Attachment 1 - Consulate Bathrooms Renovation Basement.pdf

Embassy of the United States of America

Rome, Italy

CONSULATE BASAMENT BATHROOMS RENOVATION

Facility Engineering

SENSITIVE BUT UNCLASSIFIED

1 INDEX

1 FOREWORDS

2 GENERAL

3 SAFETY STANDARDS

4 DESCRIPTION OF WORK

4.1 BATHROOMS

5 SPECIFICATIONS

5.1 SITE DEMOLITION

5.1.1 REFERENCES

5.1.2 SUBMITTALS

5.1.3 EXECUTION

5.2 SCREED

5.2.1 REFERENCES

5.2.2 SUBMITTALS

5.2.3 PRODUCTS

5.2.4 EXECUTION

5.3 GYPSUM BOARD

5.3.1 REFERENCES

5.3.2 SUBMITTALS

5.3.3 PRODUCTS

5.3.4 EXECUTION

5.4 CERAMIC TILING

5.4.1 REFERENCES

5.4.2 SUBMITTALS

5.4.3 PRODUCTS

5.4.4 EXECUTION

5.5 PAINTS AND COATINGS

5.5.1 REFERENCES

5.5.2 SUBMITTALS

5.5.3 PRODUCTS

5.5.4 EXECUTION

5.6 DOMESTIC HOT AND COLD WATER PIPING

5.6.1 REFERENCES

5.6.2 SUBMITTALS

5.6.3 PRODUCTS

5.6.4 EXECUTION

5.7 BASIC ELECTRICAL MATERIALS AND METHODS

5.7.1 REFERENCES

5.7.2 SUBMITTALS

5.7.3 PRODUCTS

5.8 SWITCHBOARDS

5.8.1 REFERENCES

5.8.2 SUBMITTALS

5.8.3 PRODUCTS

5.8.4 EXECUTION

5.8.5 INTERIOR DISTRIBUTION SYSTEMS

5.8.6 PRODUCTS

5.8.7 EXECUTION

14 MATERIAL SHEETS

1 FOREWORDS

The United States Tri-Mission in Rome needs to award a contract for the refurbishment of three (3) bathrooms located in the basement of the Consular Building, Rome.

2 GENERAL

• The contractor shall supply all the installation materials and equipment, skilled and unskilled labor, technical supervision, as well as logistic and administrative support. The contractor shall also supply all accessory services such as:

transportation, moving furniture, provide equipment and tools, disposal of debris, daily cleaning the work area and nearby premises, and anything else necessary to complete the project in compliance with the present specifications

• Maximum attention is required to ensure the safety of personnel working on-site.

Workers must operate in compliance with both local and U.S. safety codes. Since the work site is located within a residential complex, temporary safety protection measures for both third parties and workers must be installed with care, attention, and in full compliance with safety standards. Construction sites and staging areas must be secured and made inaccessible to unauthorized personnel, especially during non-working hours when the site is closed.

• The Contractor shall be responsible for submitting samples of materials and supplies to be used for approval by the COR.

• The Contractor shall verify all quantities and dimensions before placing orders for furniture and materials.

• Work execution special care:

o Provide protection for existing materials adjacent to the work area or along travel paths to prevent damage to materials, surfaces, and finishes. Such protection shall be freestanding whenever possible and of sufficient size and thickness to withstand impacts from falling debris, rolling objects (e.g., equipment, machinery, handcarts), material movement, and sparks from flame cutting. Provide all necessary devices, lifts, scaffolding, and anchors required for the proper installation of protective measures.

o Provide protection to shield objects from dust and construction activities.

Elevators must be adequately protected using rigid materials to prevent surface abrasion and impact damage, supplemented by soft cushioning to prevent surface wear.

o Protection shall prevent damage to all existing building elements and finishes, including but not limited to walls, floors, ceilings, moldings, decorative reliefs, stairs, handrails, and other architectural features and equipment.

o Maintain all protective devices in sound condition until the completion of the work. Repair or replace protective devices as necessary to ensure their effectiveness.

3 SAFETY STANDARDS

The Contractor shall comply with all the applicable health and safety obligations provided by Legislative Decree No. 81/2008 (Consolidated Law on Occupational Health and Safety).

The main objective is to eliminate or, where not possible, to reduce to the minimum any exposure of workers to risks arising from work-related activities.

To this end, the Contractor is required, when applicable, to submit the Risk Assessment Document (Documento di Valutazione dei Rischi – DVR) or the Operational Safety Plan (Piano Operativo di Sicurezza – POS), to provide adequate and documented training to workers, to supply appropriate individual and collective protective equipment (PPE and CPE), and to fully comply with all the other obligations set forth under Legislative Decree 81/2008.

Submission of the Operational Safety Plan (POS).

Within 10 calendar days after receiving the Notice to Proceed, the awarded Contractor must submit a detailed Operational Safety Plan (POS).

The POS must clearly identify the following key professional figures:

• Site Technical Director (Direttore Tecnico di Cantiere): The individual responsible for managing the construction site on behalf of the Contractor. This role may be fulfilled by either an internal employee or an external professional formally appointed by the company. This figure is not to be confused with the Construction Supervisor (Direttore dei Lavori), who is appointed by the Client and is responsible for verifying that the works are carried out in compliance with the design and technical specifications.

• Supervisor (Preposto): An individual who, by the nature of their duties, supervises the work of others (e.g., site manager, workshop head, department chief). The Supervisor must be adequately trained to fulfill the responsibilities assigned under Art. 19, paragraph 1, letter g) and in accordance with the objectives of Art. 37 of Legislative Decree 81/2008.

The Supervisor shall ensure, continuously and effectively, that:

1. Workers comply with safety instructions and the provisions of the safety plan;

2. Personal protective equipment (PPE) is used as required;

3. Any deficiencies in procedures, tools, PPE, or persistent non-compliance are promptly reported to the employer or manager.

• The contractor has to send the list of personnel who will work on site. The workers have to be regularly registered and if there is a subcontractor this has to present the documents requested too. All workers have to understand and speak Italian.

4 DESCRIPTION OF WORK

The work is the renovation of the entire bathroom block in the basement using the same materials but with slightly different quantities, supplies, and layout.

Site Preparation

Set up the construction site area, including a dedicated temporary electrical panel, equipment, protections, and all tools necessary to ensure safe execution of the work.

Demolition and disposal

Floor Tiles: Remove and dispose existing floor tiles, including the screed up to a depth of 10 cm. It is included to remove the skiting board where necessary.

Wall Tiles: Remove and dispose wall tiles along with the underlying plaster in all areas specified in the project drawings.

False ceiling: Remove and dispose false ceiling including the structure.

Fixtures: Remove and dispose all bathroom fixtures.

Doors: Remove and dispose all doors, including frames, gaskets, locks, hinges, and handles.

Electrical System: Remove and dispose the existing lighting system, light fixtures, sockets and electrical panel.

Plumbing: Remove and dispose all existing plumbing piping, including feeding and drainage lines, along with pipes, drains, and fittings.

Remove radiators.

Remove the exhaust air flow system including ducts, vent pipes, grilles.

Remove the existing water heaters (one of 100 liters above the false ceiling and one inside the ADA bathroom)

Demolish specific portions of walls as indicated in the project drawings.

Debris Management

Perform loading and unloading at any height or floor, either manually or using mechanical devices.

Dispose of all debris and waste material at an authorized dump, ensuring disposal certificates are obtained.

Floor Base Screed

Create the base screed for the floor using cement mortar with a dosage of 300 kg/m³ and a thickness of 8–10 cm including the reinforcing mesh.

Wall Preparation

Smooth existing plaster surfaces, to ensure the walls are perfectly prepared for painting.

Precisely square and prepare the bases of internal wall surfaces to accommodate the complexity of cladding installation and anchoring between walls.

Electrical System Modification

Supply and replace the existing outlets breaker with a magneto- thermic and GFCI breaker (2 poles, 16A, In: 16A, Ith: 16A, Idn: 0.01 (AC type), Im: 160A, Icu/Icn: 25kA).

Supply and replace the existing outlets breaker with a magneto-thermic and GFCI breaker (2 poles, 10A, In: 10A, Ith: 10A, Idn: 0.03 (AC type), Im: 100A, Icu/Icn: 25kA).

Supply and replace the existing water heater breaker with a magneto-thermic and GFCI breaker (2 poles, 16A, In: 16A, Ith: 16A, Idn: 0.01 (AC type), Im: 160A, Icu/Icn: 25kA).

Supply and replace the existing exhaust fan breaker with a magneto-thermic and GFCI breaker (2 poles, 10A, In: 10A, Ith: 10A, Idn: 0.03 (AC type), Im: 100A, Icu/Icn: 25kA). It is included a timer.

Install pull boxes at each location, from which the new electrical system will be derived.

Use FG16OM16 0.6/1 kV, Cca-s1,d1,a1, 3G2.5 cables to connect outlets.

Supply and install a new lighting system, connecting new light fixtures and outlets as per drawings.

Install all outlets no less than 20 cm above the floor.

Plumbing System

Supply and install a new plumbing system using multilayer pipes (DN 16'') to serve the flushing mechanism, faucets.

Supply and install a new wastewater system using grey PVC piping, with diameters not less than 40 mm for faucets and not less than 90 mm for water closets. The system must connect to the existing vertical stack, including replacement of its final section. All new drains must maintain a slope steeper than 1%. A siphon box shall be included in the installation for each bathroom.

In the ADA bathroom install a water tap.

Install a dedicated pre-assembled water distribution manifold, housed in recessed boxes and equipped with individual shut-off valves. The system must be certified under the Water Regulations Approval Scheme. A concealed push-to-open door with a panel-ready frame shall be included.

Mechanical system

Modify the existing heating system as required to accommodate the installation of new radiators. This includes tracing new supply and return lines, performing all necessary masonry work for pipe routing, preparing connections, and installing radiators complete with thermostatic and lockshield valves. The work scope also includes hydraulic connection to the existing network, pressure testing, filling, bleeding, commissioning, and final system start-up.

All heating system checks must be planned in advance and, where feasible, completed in a single day. Should any air bleeding or malfunctions occur after the work is completed, any return intervention by the plumbing team shall be the sole responsibility of the Contractor and must be scheduled in coordination with the Contracting Officer Representative (COR).

Install new built in wall centrifugal fans with IP X4, sound pressure level 30 dB, max airflow 285m3/h, create a new ducted system for air exhaust, with all the aluminum vent pipes necessary for ducting, the intake grilles recessed in the false ceiling panels and connect this to the existing air outlet grille, and provide to connect it to the electrical system and air exhaust system, including timer.

All materials and components used must be of high quality, certified, and compliant with current regulations. All work must follow best construction practices and ensure full compatibility with existing structures.

Doors

Supply and install new doors, complete with frames, counter-frames, gaskets, locks, hinges, door stops, handles, and all accessories required to complete the work to a workmanlike standard. The Contractor shall be responsible for modifying existing door openings as necessary to ensure proper fit and installation of the new doors.

4.1 BATHROOMS

Bathroom Furniture and Fixtures:

• Floor Tiles:

o Ceramic stoneware concrete-effect rectified format 60x60cm, Grip R11, tiles glued to the screed using Mapei Keracoll o Apply Mapei colored grout matching the floor and wall tiles.

• Wall Tiles:

o Ceramic stoneware: wc and sinks side in mixed betulla and camelia color size 7.5x60cm, other walls in white color size 60x60cm. tiles glued to the screed using Mapei Keracoll o Install up to 300 cm or 10 cm below the suspended ceiling.

• Drywall False Ceiling:

o Include metal support structure and plaster molding.

o Prepare surfaces with grouting of joints, corners, and anchors.

o Include a stucco frame on the perimeter.

o Double-check window height before installing the false ceiling.

• WC:

o White monoblock floor-standing toilet with cover.

• Faucets:

o steel finish, including sink faucet, shower column, bathtub water set, overhead shower, side shower with flexible hose, and handheld shower adjacent to the WC.

• Mirror:

o Rectangular anti fog mirror with light.

• Accessories:

o Toilet roll holder, brush, 2 robe hooks, and towel holder in brushed nickel.

o All bathroom furniture for person with reduced mobility, as per ADA standards: sink 86.36 cm above the floor, faucet with lever, tilted mirror, soap dispenser, towels holder, toilet, toilet brush, toilet paper holder, hooks for bags and coats.

Install grab bars: around the toilet (one fix on the right side and one-fold up and down) along the perimeter by the sink.

• Radiator:

o Wall-mounted radiator. Include pressure-independent thermostatic valves and lockshield valves.

• Water heater:

o an ultra slim water heater of 30 liters for space-saving installations

• Painting:

o Refinish and paint the ceiling, false ceiling, un-tiled wall portions, and all uncovered surfaces with a silane- and siloxane-based water emulsion primer, followed by three coats of siloxane paint. Submit color to C.O.R. for approval.

Doors

• #1 door size 90x210 cm, cubo frame.

• #4 door size 65x210 cm, cubo frame.

Material Guideline

All materials specified below are intended as guidelines. "Or-Equal" items proposed by the Contractor that are believed to be equal to or better than those named in the specifications listed below shall be approved by the Government. All samples shall be submitted to the C.O.R.

● TILES, COVERING AND SKITING BOARD

MARCA CORONA

www.marcacorona.it Floor tiles: mod. Logos 60x60cm - Grey Wall Tiles: mod: Longarine Brio7.5x 60 – Betulla and Camelia mod: Logos 60x60cm – White.

Skirting board: Longarine Brio7.5x 60

● FALSE CEILING

KNAUF

www.knauf.com mod. Hygena Aquatec

● PAINT

SIKKENS

www.sikkens.com

● SANITARIES

Bathroom

GLOBO

www.ceramicaglobo.com mod. Stockholm LA001 Floor-standing Close coupled

Bathroom ADA

GLOBO

www.ceramicaglobo.com mod. Genesis Argento Floor-standing Close coupled

GLOBO

www.ceramicaglobo.com mod. I classici

SENSITIVE BUT UNCLASSIFIED

http://www.marcacorona.it/ http://www.knauf.com/ http://www.ceramicaglobo.com/ http://www.ceramicaglobo.com/ http://www.ceramicaglobo.com/

NOBILI

www.nobili.it/ mod. Up

● DOORS

MESSERE PORTE

www.messereporte.it model SETA- Cubo frame – Laminated finishes – White

● MANIFOLD

CALEFFI

www.caleffi.com Code 360054 Manifold pre-assembled in boxes with individual shut-off valves. Water Regulations Approval Scheme certified. Recessed door with push-to-open panelable frame included.

● RADIATORS

CORDIVARI

www.cordivari.it mod. Rosy vertical

● SOCKETS AND PLATES

BTICINO

www.bticino.com mod. MatixGo

● LIGHTS

SYLVANIA

https://www.sylvania-group.com/ mod. START FLAT PANEL 0047645

● VENTILATION

VORTICE

www.vortice.com mod. SUPER I T HCS – code 12067

SENSITIVE BUT UNCLASSIFIED

http://www.nobili.it/ http://www.cordivari.it/

● PLUMBING ELEMENTS

GEBERIT

www.geberit.com Mod. Silent-dB20 and Sigma 8 flush-mounted cistern, free position flush button type 01 with double chrome button.

http://www.geberit./

5 SPECIFICATIONS

5.1 SITE DEMOLITION

5.1.1 REFERENCES

The Contractor shall comply with all applicable laws, codes, and regulations, whether local or those of the United States, as may be applicable to the scope of work, with the more stringent requirements prevailing in the event of any conflict. Compliance with the standards and regulations listed herein shall be considered the minimum requirement.

ITALIAN REGULATIONS

Demolition and Site Safety

Law Decree 14 August 1996 – Construction Site Regulations (Cantieri Temporanei o Mobili)

Legislative Decree 14 August 1996, No. 494 – Implementation of EU Directive 92/57/EEC on minimum safety and health requirements on temporary or mobile construction sites

Legislative Decree 10 September 1994, No. 626 – Implementation of EU Directive on workplace health and safety

Waste Management

Law Decree 15 November 1993 – General Provisions on Waste Management

Legislative Decree 5 February 1997, No. 22 (Ronchi Decree) – Implementation of EU Directives on waste and packaging waste

Legislative Decree 8 November 1997, No. 389 – Waste Management Amendments

Ministerial Decree 1 April 1998, No. 145 – Implementation measures for waste collection and disposal

Ministerial Decree 28 April 1998, No. 406 – Environmental Management Procedures

Ministerial Decree 24 June 1998, No. 261 – Extended Producer Responsibility (EPR)

Ministerial Circular 4 August 1998 No. GAB/DEC/812/98 – Clarifications on waste regulations

Ministerial Decree 13 March 2003 – Landfill waste admissibility criteria

Ministerial Decree 28 June 2024, No. 127 – End-of-Waste Criteria for Construction and Demolition Waste Aggregates

Asbestos Removal and Remediation

Law 27 March 1992, No. 257 – Ban on Asbestos Use in Italy

Ministerial Decree 6 September 1994 – Technical Methods for Asbestos Removal (pursuant to Law 257/1992)

Legislative Decree 17 March 1995, No. 114 – Implementation of Directive 87/217/EEC on reducing environmental pollution from asbestos

Ministerial Circular 12 April 1995, No. 7 – Explanatory Circular on MD 6/09/1994

Ministerial Decree 14 May 1996 – Technical Guidelines for Asbestos Site Reclamation

Ministerial Decree 12 February 1997 – Criteria for Asbestos Substitute Product Approval

Ministerial Decree 26 March 1998 – Approved Products and Companies for Asbestos Substitution

Decree 20 August 1999 – Enhancement of Reclamation Technical Guidelines

Ministerial Decree 25 July 2001 – Correction of MD 20 August 1999

Interministerial Decree 10 December 2002, No. 308 – Mesothelioma Registry Requirements

Albo Nazionale Gestori Ambientali Deliberation 14 March 2001 – Registration Criteria for Category 10 – Asbestos Reclamation

U.S. REGULATIONS

Demolition and Worker Safety – OSHA

29 CFR 1926 Subpart T – Safety Standards for Demolition Activities

§1926.850 – Preparatory Operations

§1926.852–§1926.860 – Equipment, Structural Demolition, Explosives, etc.

29 CFR 1926.1101 – Asbestos in Construction Standard (Classes I–IV Work)

29 CFR 1926 PPE Rule (2025 Update) – Personal Protective Equipment Fit and Use – effective Jan 13, 2025

Asbestos – EPA & Clean Air Act

40 CFR 61 Subpart M (NESHAP) – National Emission Standards for Hazardous Air Pollutants – Asbestos

Requires: Pre-demolition asbestos survey, notification to EPA 10 days in advance, controlled removal and disposal

TSCA Section 6 – Chrysotile Asbestos Ban (Final Rule, March 2024) – Nationwide ban on white asbestos

EPA Risk Evaluation – Asbestos Part 2 (2024) – Final risk assessment covering legacy uses and disposal

Waste Management – EPA

Resource Conservation and Recovery Act (RCRA)

Subtitle C – Hazardous Waste (Cradle-to-Grave)

Subtitle D – Non-Hazardous Solid Waste (incl. C&D debris)

Solid Waste Disposal Act (SWDA, 1965) – General Waste Management Framework

Pollution Prevention Act (1990) – Source Reduction and Waste Minimization

5.1.2 SUBMITTALS

Statements: A demolition plan giving the procedures proposed for the accomplishment of salvage, demolition and removal work shall be submitted to the Contracting Officer’s Representative and approved before work is started. The procedures shall provide for careful removal and disposition of materials specified to be salvaged and coordination with other work in progress. The procedures shall include a detailed description of the methods and equipment to be used for each operation, the sequence of operations and in case of demolition of adherence built constructions or in case of partial demolitions they shall also include the calculation of provisional structures which are to bear possible walling and, if the size of the work requires it, also a geotechnical report about the adjoining buildings.

5.1.2.1 GENERAL REQUIREMENTS

The work includes the demolition and/or the removal of all construction indicated or specified. All materials resulting from demolition work, except as indicated or specified otherwise, shall become the property of the Contractor and shall be removed from the limits of Government property. Trash and debris shall be removed from the station daily, unless otherwise directed, and shall not be allowed to accumulate on the site. Such materials which, in the opinion of the Contracting Officer’s Technical Representative, cannot practically be removed daily shall be neatly stored on the site where directed by the Contracting Officer.

5.1.2.2 DUST AND DEBRIS CONTROL

Dust resulting from salvage, demolition and removal work shall be controlled to prevent the spread of dust and avoid creation of a nuisance in the surrounding area. Use of water will not be permitted when it may result in, or create, hazardous or objectionable conditions such as ice, flooding and pollution.

5.1.2.3 PROTECTION

● Protection of Existing Work from Damage:

Protect existing work which is to remain in place, to be reused, or to remain on the property of the Government by temporary covers, shoring, bracing and supports.

Repair such items which are damaged during performance of the work or replace with new. Do not overload structural elements. Provide new supports or reinforcement for existing construction which is weakened by demolition or removal work.

● Weather Protection

The interior of the building and all materials and equipment shall be protected from the weather at all times. Where removal of existing roofing is necessary to accomplish work, materials and workmen necessary to provide adequate and approved temporary covering of exposed areas shall be kept in readiness at all times. Temporary coverings shall be attended as necessary to ensure their effectiveness and prevent displacement.

● Protection of the Trees and Shrubs

Protect trees and shrubs within the project site that might be damaged during demolition, and that are indicated to be left in place. Restore trees scarred or damaged by Contractor equipment or operations to a satisfactory condition or replace them as determined by the Contracting Officer’s Representative.

● Facilities

Protect all electrical and mechanical services and utilities. Where removal of existing utilities and pavement is specified or indicated, provide approved barricades, temporary covering of exposed areas and temporary services or connections for electrical and mechanical utilities.

● Protection of Personnel

Where pedestrians’ and drivers’ safety is endangered in the area of work removal, barricades for traffic shall be used and advance notice shall be given to the Contracting Officer prior to beginning any such work.

5.1.2.4 USE OF EXPLOSIVES

Use of explosives will not be permitted.

5.1.2.5 BURNING

Burning will not be permitted.

5.1.2.6 RELOCATIONS

Perform the removal and reinstallation of relocated items as indicated with workmen skilled in the trades involved. Repair items to be relocated which are damaged or replace damaged items with new undamaged items as approved by the Contracting Officer’s Representative.

5.1.2.7 MATERIAL DISPOSAL

● Title to Materials

Title to all materials and equipment to be removed, except as specified otherwise, is vested in the Contractor upon receipt of notice to proceed. The Government will not be responsible for the condition, loss or damage to such property after notice to proceed.

● Material to be salvaged

Salvaged material shall be stored as directed by the Contracting Officer.

● Reuse of materials and equipment

Carefully remove and store materials indicated to be reused or relocated to prevent damage and reinstall as the work progresses.

5.1.2.8 CLEAN-UP

● Debris and Rubbish Control

Debris and rubbish shall be removed each day and transported in a manner that will prevent spillage on streets or adjacent areas. Clean up spillage from streets and adjacent areas.

● Regulations

National, Provincial, and local regulations regarding hauling and disposal shall be complied with.

5.1.3 EXECUTION

5.1.3.1 DEMOLITIONS AND REMOVALS

The demolition of masonry, concrete, both partial and complete, must be carried out in order and with the necessary precautions, so as not to damage the residual walls, to prevent any injury to workers and to avoid inconvenience or disturbance.

It is therefore forbidden to throw away the materials in general, which instead must be transported or guided down, and to raise dust, so both the walls and the resulting materials must be properly wet. In demolitions and removals, the Contractor must also provide for any necessary shoring to support the parts that must remain and arrange so as not to deteriorate the resulting materials, which must still be able to be used within the limits agreed with the management of the works, under penalty of recourse for damage in favor of the contracting authority. Demolitions should be limited to the prescribed parts and dimensions. When, also due to lack of shoring or other precautions, other parts are demolished or the limits set are exceeded, the parts unduly demolished will also be rebuilt and restored at the expense of the Contractor, without any compensation. All reusable materials, at the sole discretion of the management of the works, must be properly cleaned, guarded, transported and ordered in the places of storage that will be indicated by the management itself, using precautions not to damage them both in cleaning, both in transport, and in their settling and to avoid dispersion. These materials all remain the property of the contracting authority, which may order the Contractor to use them in whole or in part in the contracted works, pursuant to art. 40 of the current General Specifications, with the prices indicated in the list of these Specifications.

● Demolition

Demolition is the process of wrecking or taking out any load-supporting structural member of a facility together with any related handling and disposal operations.

● Deconstruction

Deconstruction is the process of taking apart a facility with the primary goal of preserving the value of all useful building materials.

● Demolition Plan

Demolition Plan is the planned steps and processes for managing demolition activities and identifying the required sequencing activities and disposal mechanisms.

● Deconstruction Plan

Deconstruction Plan is the planned steps and processes for dismantling all or portions of a structure or assembly, to include managing sequencing activities, storage, re-installation activities, salvage, and disposal mechanisms.

● Demolition/Deconstruction Plan

Prepare a Demolition Plan and Deconstruction Plan and submit proposed demolition, deconstruction, and removal procedures for approval before work is started. Include in the plan procedures for careful removal and disposition of materials specified to be salvaged, coordination with other work in progress, a disconnection schedule of utility services, a detailed description of methods and equipment to be used for each operation and of the sequence of operations. Coordinate with Waste Management Plan. Include statements affirming Contractor inspection of the existing roof deck and its suitability to perform as a safe working platform or if inspection reveals a safety hazard to workers, state provisions for securing the safety of the workers throughout the performance of the work.

Provide procedures for safe conduct of the work in accordance with PSC Plan shall be approved by Contracting Officer prior to work beginning.

● General Requirements

Do not begin demolition or deconstruction until authorization is received from the Contracting Officer Representative. Remove rubbish and debris from the daily, do not allow accumulations inside or outside the buildings. The work includes demolition, deconstruction, salvage of identified items and materials, and removal of resulting rubbish and debris. Remove rubbish and debris from the property daily, unless otherwise directed. Store materials that cannot be removed daily in areas specified by the C.O.R.

● Items to remain in place

Take necessary precautions to avoid damage to existing items to remain in place, to be reused, or to remain the property of the Government. Repair or replace damaged items as approved by the Contracting Officer Representative. Coordinate the work of this section with all other work indicated. Construct and maintain shoring, bracing, and supports as required. Ensure that structural elements are not overloaded. Increase structural supports or add new supports as may be required as a result of any cutting, removal, deconstruction, or demolition work performed under this contract. Do not overload structural elements pavements to remain. Provide new supports and reinforcement for existing construction weakened by demolition, deconstruction, or removal work. Repairs, reinforcement, or structural replacement require approval by the Contracting Officer prior to performing such work.

5.2 SCREED

5.2.1 REFERENCES

The Contractor shall comply with all applicable laws, codes, and regulations, whether local or those of the United States, as may be applicable to the scope of work, with the more stringent requirements prevailing in the event of any conflict. Compliance with the standards and regulations listed herein shall be considered the minimum requirement.

ITALIAN STANDARDS

UNI EN 13813: Screed Materials and Floor Screeds — Properties and Requirements

UNI 11493: Cement-Based Screeds

Legislative Decree 81/2008 on health and safety in construction sites

INTERNATIONAL STANDARDS

ASTM C472 / C472M: Standard Test Methods for Physical Testing of Gypsum, Gypsum Plasters and Gypsum Concrete

ASTM C109 / C109M: Compressive Strength of Hydraulic Cement Mortars

EN 12620: Aggregates for Concrete

5.2.2 SUBMITTALS

SD – Product Data Technical Data Sheets: For all materials used, including cement, aggregates, lightweight aggregates, additives, and admixtures.

Mix Design: Detailed mix proportions indicating quantities of cement, aggregates, water, additives, expected workability, compressive strength, and drying times.

SD – Samples Samples: Physical samples of screed mix for approval.

SD – Certificates Test Reports: Laboratory test results confirming compliance with strength, shrinkage, density, and durability specifications.

SD – Execution Plan Execution Plan: A method statement describing surface preparation, mixing, placement, curing, finishing, and protection procedures.

SD – Moisture Tests Moisture Tests: Proposed procedures and equipment to test moisture content of substrate and screed before floor finishes installation.

5.2.3 PRODUCTS

Cement: Use Ordinary Portland Cement (CEM I) complying with EN 197-1 or equivalent hydraulic binders. Cement must be fresh, free from lumps, and stored properly.

Aggregates: Clean, well-graded sand or fine aggregates free from organic matter, clay, or deleterious substances. For traditional screeds, use natural or crushed sand complying with EN 12620.

Water: Clean potable water free from oils, acids, or salts harmful to cement hydration or screed durability.

Additives and Admixtures: Plasticizers to improve workability, retarders or accelerators to adjust setting time, and shrinkage reducers where applicable. Only admixtures approved for use in screeds shall be used.

5.2.3.1 Traditional Cementitious Screed

• Mix Proportions: Typically 1:3 to 1:5 cement to sand by volume, or as specified by structural requirements.

• Compressive Strength: Minimum 25 MPa at 28 days unless otherwise specified.

• Thickness: Usually from 30 mm to 50 mm for standard applications, increased if structural requirements dictate.

• Surface Finish: Smooth and flat to tolerances of ±3 mm over 2 meters length.

• Curing: Moist curing or application of curing compounds immediately after finishing. Protect from premature drying and freezing conditions.

• Application: Suitable for normal traffic loads and floor coverings installation.

5.2.3.2 Lightweight Screeds

• Composition: Hydraulic binder mixed with lightweight aggregates such as expanded clay (LECA), perlite, or vermiculite, designed to reduce weight and improve insulation.

• Density: Target dry density typically between 1000 kg/m³ and 1600 kg/m³ depending on application and mix design.

• Thermal and Acoustic Properties: Improved thermal insulation and sound absorption compared to traditional screeds, making them ideal for multi-story buildings and retrofit works.

• Strength: Minimum compressive strength between 10 MPa and 15 MPa or as required by the project.

• Application Areas: Suitable for floating screeds over insulation layers, or where structural load minimization is required.

• Mixing and Placing: Requires careful control of water content and uniform mixing to avoid segregation of lightweight aggregates.

• Curing: Similar to traditional screeds but may require longer curing due to different hydration and drying characteristics of lightweight materials.

5.2.3.3 Diatonite Screeds

• Aggregate: Incorporate diatomaceous earth (diatonite), a highly porous volcanic sedimentary material, as partial or total replacement for conventional sand in the screed mix.

• Properties: Lightweight, high porosity, excellent thermal insulation, moisture regulation, and fire resistance.

• Density: Typically between 1200 kg/m³ and 1500 kg/m³.

• Binders: Use hydraulic binders compatible with diatonite, including cement or lime-based binders depending on performance requirements.

• Mechanical Strength: Compressive strength generally in the range of 10 MPa to 20 MPa; exact values confirmed by testing.

• Application: Ideal for environments requiring improved thermal comfort, moisture buffering, and fire performance. Often used in residential and commercial flooring systems with enhanced performance requirements.

• Workability: Diatonite’s porous nature affects water demand and workability;

mixes must be adjusted accordingly to avoid shrinkage and cracking.

• Curing: Extended curing times may be necessary due to the absorbent nature of diatonite aggregates. Protection from rapid drying is critical.

• Sustainability: Diatonite is a natural material with low environmental impact and contributes to healthier indoor environments by regulating humidity.

5.2.4 EXECUTION

5.2.4.1 Surface Preparation:

o Inspect substrate for cleanliness, soundness, and dryness. Remove dust, grease, oil, laitance, loose particles, and contaminants.

o Repair substrate defects prior to screed application.

o Apply suitable primer or bonding agent to ensure adhesion of screed to substrate, especially over non-absorbent surfaces.

o Check moisture content of substrate to prevent moisture entrapment and possible screed failures.

5.2.4.2 Mixing:

o Mix materials in mechanical mixers to achieve homogeneous and consistent mix without segregation.

o Do not add excess water; water-cement ratio must be controlled for strength and durability.

o For lightweight and diatonite screeds, adjust mixing time and water content to achieve optimum workability.

5.2.4.3 Placing:

o Transport screed promptly from mixer to placement area to avoid premature setting.

o Pour screed evenly and compact carefully to remove air pockets and voids.

o Use appropriate tools to level and smooth surface within required tolerances.

o Maintain screed thickness as specified, with minimum thickness to avoid cracking or failure.

o Use reinforcements such as mesh or fibers if specified to reduce cracking risk.

5.2.4.4 Curing:

o Protect screed from rapid evaporation, high wind, frost, or direct sunlight immediately after finishing.

o Apply curing compounds or cover screed with damp coverings or plastic sheets for minimum 7 days or longer as needed.

o Avoid premature loading or traffic until screed has reached sufficient strength.

5.2.4.5 Drying And Moisture Testing:

o Allow screed to dry to required moisture levels before installation of floor finishes.

o Test residual moisture content with appropriate instruments (e.g., calcium chloride test, hygrometer).

o Ensure compliance with manufacturer recommendations for flooring systems to avoid failures.

5.2.4.6 Protection:

o Protect screed surface from damage caused by subsequent trades, foot traffic, or environmental conditions during curing and drying phases.

o Repair any damages or defects in accordance with approved repair procedures.

5.2.4.7 Tolerances:

o Ensure flatness and levelness within ±3 mm over 2 meters or as specified.

o Surface should be free of cracks, hollows, excessive roughness, or delamination.

5.2.4.8 Repairs:

o Any cracks, voids, or surface irregularities must be repaired immediately using compatible materials and approved techniques.

o Follow up repairs with appropriate curing and protection.

5.2.4.9 Installers Qualifications

• All screed installers and applicators shall be skilled tradespeople with proven experience in screed installation, having completed at least 3 years of continuous work on similar projects.

• The Contractor shall provide documentation of the installers’ qualifications, including references to previous projects and certificates of training where applicable.

• A site supervisor experienced in screed works must be present at all times during installation to ensure compliance with specifications and best practices.

• Installers must be familiar with health and safety regulations relevant to screed works, including the use of personal protective equipment (PPE) and safe handling of materials.

5.2.4.10 Weather And Environmental Conditions

• Screed works shall be carried out only under suitable weather and environmental conditions to ensure proper curing and prevent defects.

• Temperature Range:

o Ideal ambient and substrate temperatures for screed application are between 5°C and 30°C.

o Screed installation shall be avoided if temperatures are forecast to fall below 5°C or rise above 30°C during the first 72 hours after placement.

o In cold weather (below 5°C), use approved methods to protect the screed from freezing, such as thermal blankets, heated enclosures, or accelerated curing compounds.

• Humidity:

o Relative humidity should preferably be between 40% and 70% during and after placement.

o Avoid screed installation in very high humidity conditions where drying will be significantly delayed.

• Rain and Moisture:

o Screed shall not be placed during rainfall or if substrate is wet or contains standing water.

o Surfaces must be dry and free from frost or ice before application.

o If unexpected rain occurs immediately after placement, provide adequate protection such as tarps or temporary shelters.

• Wind:

o Strong winds that could cause rapid evaporation and surface drying shall be mitigated by windbreaks or protective coverings.

• Sun Exposure:

o Direct sunlight exposure should be controlled to prevent rapid drying and cracking; use shading if necessary.

o The Contractor is responsible for monitoring weather forecasts and adjusting the schedule or providing protective measures as needed to comply with these conditions.

5.3 GYPSUM BOARD

5.3.1 REFERENCES

The Contractor shall comply with all applicable laws, codes, and regulations, whether local or those of the United States, as may be applicable to the scope of work, with the more stringent requirements prevailing in the event of any conflict. Compliance with the standards and regulations listed herein shall be considered the minimum requirement.

EUROPEAN STANDARDS & EUROPEAN COMMITTEE FOR STANDARDIZATION

UNI 11424:2015 – Gypsum plasterboards – Non-loadbearing plasterboard systems on metal frames – Installation

UNI EN 13501‑1:2019 – Fire classification of construction products and building elements – Part 1: Classification using data from reaction to fire tests

UNI EN 13964:2014 – Suspended ceilings – Requirements and test methods

UNI EN 1364‑1/2:2018 – Fire resistance tests for non-loadbearing building elements (walls/partitions & ceilings)

UNI EN 14246:2006 – Gypsum elements for suspended ceilings – Definitions, requirements and test methods

DIN EN 520:2009-12 – Gypsum plasterboards – Definitions, requirements and test methods

EN 13815:2006 – Fibrous gypsum boards – Definitions, requirements and test methods

EN 13963:2014 – Jointing compounds and paper tapes for gypsum boards – Definitions, requirements and test methods

EN 13238:2010 – Reaction to fire – Conditioning procedures and general rules for sample preparation (clarifies Euroclass testing protocols)

CPR & Euroclass per applicazione cartongesso: Euroclass A2‑s1,d0 per cartongesso standard

INTERNATIONAL STANDARDS (ISO)

BS EN ISO 140‑1:1998 – Acoustics: Measurement of sound insulation in buildings – Part 1: Requirements for laboratories

BS EN ISO 140‑3:1995 – Acoustics: Measurement of airborne sound insulation – Laboratory measurements of building elements

AMERICAN STANDARD

ASTM E 90 – Standard Test Method for Laboratory Measurement of Airborne Sound Transmission Loss of Building Partitions and Elements

Gypsum plasterboard systems (including boards, support systems, jointing compounds and tapes) shall comply with all applicable European harmonised and national standards, including EN 520 (or DIN EN 520), EN 13964, EN 1364-1/2, EN 13815, EN 13963, EN 13238 and EN 13501-1 for fire reaction (minimum Euroclass A2-s1,d0). Installation shall follow UNI 11424. Acoustic performance must meet laboratory-tested sound insulation per ASTM E90 or BS EN ISO 140-3, with laboratory accreditation per ISO 140-1

5.3.1.1 SUMMARY

Section Includes:

1. Interior gypsum board.

2. Exterior gypsum board for ceilings and soffits.

3. Sound-rated construction.

4. Tile backing panels.

5. Gypsum board finishing.

6. Trim and accessories

5.3.2 SUBMITTALS

A. Product Data: For each type of product.

B. Samples: For the following products:

1. Trim Accessories: Full-size Sample in 12-inch (300-mm) long length for each trim accessory indicated.

C. Shop Drawings: Submit Shop Drawings of interior wall elevations indicating control joint locations.

5.3.2.1 QUALITY ASSURANCE

A. Fire-Test-Response Characteristics: For gypsum board assemblies with fire-resistance ratings, provide materials and construction identical to those tested in assembly indicated by an independent testing and inspecting agency acceptable to authorities having jurisdiction, and according to one of the following standards:

1. ASTM E 119 "Test Methods for Fire Tests of Building and Construction Materials."

2. ISO 834, Parts 1, 3-9 “Fire Resistance Tests-Elements of Building Construction."

3. Fire-Resistance-Rated Assemblies: Indicated by design designations from UL's "Fire Resistance Directory.

B. Sound Transmission Characteristics: For gypsum board assemblies with STC ratings, provide materials and construction identical to those tested in assembly indicated according to one of the following standards:

1. ASTM E 90 "Standard Test Method for Laboratory Measurement of Airborne Sound Transmission Loss of Building Partitions and Elements."

2. BS EN ISO 140-1:1998 Acoustics: Measurement of Sound Insulation in Buildings and Building Elements Part 1: Requirements for Laboratories.

3. BS EN ISO 140-3: 1995 Acoustics: Measurement of Sound Insulation in Buildings and Building Elements Part 3: Laboratory Measurements of Airborne Sound Insulation of Building Elements.”

4. STC-Rated Assemblies: Indicated by design designations from Gypsum Association's GA-600, "Fire Resistance Design Manual."

C. Mockups: Before finishing gypsum board assemblies, build mockups of at least 9

sq. m (100 sq. ft.) in surface area to demonstrate aesthetic effects and to set quality standards for materials and execution.

1. Build mockups for the following:

a. Each level of gypsum board finish indicated for use in exposed locations.

b. Each texture finish indicated.

2. Apply or install final decoration indicated, including painting and wallcoverings, on exposed surfaces for review of mockups.

3. Simulate finished lighting conditions for review of mockups.

4. Approved mockups may become part of the completed Work if undisturbed at time of Substantial Completion.

5.3.2.2 DELIVERY, STORAGE AND HANDLING

A. Deliver materials in original packages, containers, or bundles bearing brand name and identification of manufacturer or supplier. Comply with Gypsum Association publication GA-238-03 "Guidelines for Prevention of Mold Growth on Gypsum Board" for transportation, storage and handling requirements.

B. Store materials inside under cover and keep them dry and protected against weather, condensation, direct sunlight, construction traffic, and other potential causes of damage. Stack panels flat and supported on risers on a flat platform to prevent sagging.

5.3.2.3 FIELD CONDITIONS

A. Environmental Limitations: Comply with UNI 11424:2015 requirements or gypsum board manufacturer's written instructions, whichever are more stringent.

B. Do not install paper-faced gypsum panels until installation areas are enclosed and conditioned.

C. Do not install panels that are wet, moisture damaged, and mold damaged.

1. Indications that panels are wet, or moisture damaged include, but are not limited to, discoloration, sagging, or irregular shape.

2. Indications that panels are mold damaged include, but are not limited to, fuzzy or splotchy surface contamination and discoloration.

5.3.3 PRODUCTS

Include data for material descriptions, recommendations for product shelf life, and precautions for flammability and toxicity.

5.3.3.1 PERFORMANCE REQUIREMENTS

A. Fire-Resistance-Rated Assemblies: For fire-resistance-rated assemblies, provide materials and construction identical to those tested in assembly indicated according to UNI EN 1364-1/2:2018 or ASTM E119 by an independent testing agency.

5.3.3.2 INTERIOR GYPSUM BOARD

A. Gypsum Wallboard

B. Gypsum Board

C. Flexible Gypsum Board: Manufactured to bend to fit radii and to be more flexible than standard regular-type gypsum board of same thickness.

D. Gypsum Ceiling Board

E. Foil-Backed Gypsum Board

F. Abuse-Resistant Gypsum Board

G. Impact-Resistant Gypsum Board https://www.certifico.com/normazione/358-news-normazione/6259-uni-en-1364-1-2-2018

H. Mold Resistant Gypsum Board

5.3.3.3 TRIM ACCESSORIES

Interior Trim: UNI 11424:2015

1. Material: Galvanized or aluminum-coated steel sheet or rolled zinc.

2. Shapes:

a. Cornerbead.

b. Bullnose bead.

c. LC-Bead: J-shaped; exposed long flange receives joint compound.

d. L-Bead: L-shaped; exposed long flange receives joint compound.

e. U-Bead: J-shaped; exposed short flange does not receive joint compound.

f. Expansion (control) joint.

g. Curved-Edge Cornerbead: With notched or flexible flanges.

h. Base-of-Wall Galvanized Moisture Barrier Trim: Galvanized-steel sheet, 2 inches (50 mm) high.

5.3.3.4 JOINT TREATMENT MATERIALS

Joint Tape: - Interior Gypsum Board: Paper

Joint Compound for Interior Gypsum Board: For each coat, use formulation that is compatible with other compounds applied on previous or for successive coats.

1. Prefilling: At open joints (rounded or beveled panel edges) and damaged surface areas, use setting-type taping compound.

2. Embedding and First Coat: For embedding tape and first coat on joints, fasteners, and trim flanges, use [setting-type taping] [drying-type, all-purpose] compound.

a) Use setting-type compound for installing paper-faced metal trim accessories.

3. Fill Coat: For second coat, use [setting-type, sandable topping] [drying-type, all-purpose] compound.

2. Finish Coat: For third coat, use [setting-type, sandable topping] [drying-type, all-purpose] compound.

3. Skim Coat: For final coat of Level 5 finish, use [setting-type, sandable topping compound] [drying-type, all-purpose compound] [high-build interior coating product designed for application by airless sprayer and to be used instead of skim coat to produce Level 5 finish].

5.3.3.5 AUXILIARY MATERIALS

a. Provide auxiliary materials that comply with referenced installation standards and manufacturer's written instructions.

b. Laminating Adhesive: Adhesive or joint compound recommended for directly adhering gypsum panels to continuous substrate.

c. Steel Drill Screws: unless otherwise indicated.

1. Use screws complying with ASTM C954 for fastening panels to steel members from 0.84 to 2.84 mm (0.033 to 0.112 inch) thick.

2. For fastening cementitious backer units, use screws of type and size recommended by panel manufacturer.

d. Sound-Attenuation Blankets: Type I (blankets without membrane facing) produced by combining thermosetting resins with mineral fibers manufactured from glass, slag wool, or rock wool.

1. Fire-Resistance-Rated Assemblies: Comply with mineral-fiber requirements of assembly.

e. Thermal Insulation: As specified in Section

f. Vapor Retarder: As specified in Division

5.3.3.6 CERTIFICATES

Remove products from the work site which do not conform and replace with new products that conform to the referenced specification. Test replacement products that failed initial testing at no cost to the Government.

Regulatory Requirements In addition to requirements specified elsewhere for environmental protection, provide coating materials that conform to the restrictions of the local Air Pollution Control District and regional jurisdiction. Notify Contracting Officer Representative of any paint specified herein which fails to conform.

5.3.4 EXECUTION

5.3.4.1 EXAMINATION

A. Examine areas and substrates including welded hollow-metal frames and support framing, with Installer present, for compliance with requirements and other conditions affecting performance of the Work.

B. Examine panels before installation. Reject panels that are wet, moisture damaged, and mold damaged.

C. Proceed with installation only after unsatisfactory conditions have been corrected.

5.3.4.2 INSTALLATION AND FINISHING OF PANELS, GENERAL

A. Install in accordance with reference standards and manufacturer's instructions, and as required to comply with seismic requirements.

B. Gypsum Board Application and Finishing Standards: Comply with one…