Nguard_____Dorchester____Specs.pdf

Roof Replacement Project Mass. Army National Guard

Dorchester, MA RBA Project No. 201057.00

02050 - 1 DEMOLITION

SECTION 02050

DEMOLITION

PART 1 – GENERAL

1.01 GENERAL REQUIREMENTS

A. The General Conditions of the Contract for Construction and the General Requirements are hereby made part of this specification.

1.02 SECTION INCLUDES

A. The work of this section consists of the demolition and legal disposal of materials to be removed at specified locations.

B. Demolition work shall include, but is not limited to, the following:

1. The removal and legal disposal of the existing roofing systems as required to accomplish the work as specified and detailed. The Contractor shall use extreme caution during the roof removal and replacement operations. The Contractor is responsible for maintaining the roofs in a watertight condition during the roof removal and replacement process. The Contractor is responsible for preventing any construction related material from entering the building and the roof drainage system(s) during the roof removal and replacement process.

2. The project consists of a “tear-off” application; therefore the demolition work shall consist of complete removal and legal disposal of the existing roofing system and associated components down to the roof deck level.

3. The complete removal and legal disposal of any deteriorated structural roof decking that may be required. The Contractor is to exercise extreme caution when removing the existing roofing systems to ensure the integrity of the existing roof decking. Any damage to the roof decking as a result of the roof removal process shall be properly repaired by the Contractor at no additional cost (quantities will not be included in the bid repair quantities).

Any deteriorated roof deck as a result of previous moisture penetration, shall be properly repaired or replaced by the Contractor and only these quantities shall apply to the bid quantities.

C. The existing roofing system composition information as illustrated on Drawing

T-2 has been compiled from a variety of sources. Plans and dimensions under which the Work is to be performed are derived from a variety of sources. The existing conditions are provided for information only. Actual conditions may vary.

Contractor is required to verify existing roofing system composition, conditions, and dimensions prior to submitting his bid. No additional compensation or time extension will be made for dimensional errors or discoverable inaccuracies related to existing conditions in the contract documents.

02050 - 2 DEMOLITION

D. The Contractor shall use extreme caution during roof removal and replacement operations. Mechanical and electrical equipment such as lighting, electrical conduits, junction boxes, ductwork, suspended ceilings, etc. may exist in the vicinity of or on the underside of the decking. Contractor shall take all necessary precautions so as not to cause any damages to such equipment. Any damages that interrupt service and/or require repairs shall be the responsibility of the Contractor at no additional cost to the Owner. Repairs shall be completed promptly.

E. The drawings indicate and show limits of construction for this project. The specifications specify material and work requirements for this project. Both are complementary to each other and both shall be followed to complete the work.

1.03 RELATED WORK

A. Section 06100 - Rough Carpentry B. Section 07220 - Roof Insulation C. Section 07530 - PVC Roofing and Flashing D. Section 15100 - Temporary Mechanical Disconnects E. Section 16100 - Temporary Electrical Disconnects

1.04 PROJECT COORDINATION

A. The Project Coordination Administrator shall be the Engineer as employed and directed by the Owner. The Contractor shall cooperate fully with the Administrator in all aspects of the demolition, including but not limited to, the following: allocation of demolition areas, demolition equipment, dumpsters, dump trucks, chutes, protection; hours of operation, and traffic flow.

B. It is the responsibility of the Contractor to coordinate the work of this Section with all other work on the project.

C. The Contractor shall make all necessary arrangements to limit travel on the existing roof systems. Where it is necessary to travel on the existing roofing system the contractor shall provide all necessary temporary protection needed to protect the existing roofing system so as to ensure no leaks into the facility. Any damage to the existing roofing system caused by work of this contract shall be repaired at no cost to the owner. The contractor shall maintain the building in a watertight condition through the duration of the contract.

D. Contractor shall coordinate completion and clean up of work on a daily basis, including maintaining water-tightness for project duration.

02050 - 3 DEMOLITION

1.05 PROJECT PROGRESS SCHEDULES

A. Contractor shall prepare and provide his Project Progress Schedule, prior to the preconstruction meeting, to the Engineer for review. The schedule shall show the complete sequence of construction by activity, with dates for beginning and completion of each element of construction. Identify each item by specification Section number. Provide sub-schedules to define critical portions of the entire schedule. Coordinate content with Schedule of Values.

B. The Project Progress Schedule will be reviewed at the preconstruction meeting and will be updated at each construction meeting, or more often as needed.

Contractor shall update the schedule after each meeting, identifying changes since previous version, and submit to all parties in advance of the next scheduled construction meeting, or as directed by the Engineer.

1.06 SUBMITTALS

A. The Contractor shall submit for approval the complete sequence of operations for demolition and show how it is coordinated with all other aspects of the job. Work shall not begin until such a schedule has been approved by the Engineer and the Owner.

B. The Contractor shall submit a description of all procedures and equipment to be utilized to perform the demolition work, debris control and disposal. No heavy mobile equipment shall be permitted on the roof deck structures.

C. Contractor shall submit to the Engineer, for approval, proposed methods used to contain dust and fumes in the work area.

D. Submit copies of proposed rodent and pest control program that Contractor will utilize (if it becomes necessary) including products to be used, manufacturer’s instructions, areas to be treated, and pollution preventive measures.

E. The Contractor shall provide a list of damaged or deteriorated elements of the building and adjacent areas to the Owner prior to the demolition process and shall be responsible for repair or replacement of damaged or deteriorated items not on that list when the operations of the Contractor are complete.

1.07 HAZARDOUS MATERIALS

A. If any hazardous waste materials, or materials suspected to contain hazardous waste including asbestos or lead, are encountered during construction, demolition, or cutting and patching. The Contractor shall contact the appropriate Massachusetts State Agency and the appropriate Federal Agency concerning all questions and the latest procedures for the safe removal, disposal, or encapsulation of these materials and shall adhere to all procedures. The Contractor shall provide the Owner these procedures prior to any demolition.

The Contractor shall also provide the Owner all information related to the safe

02050 - 4 DEMOLITION

disposal of such upon project completion (i.e. dumping slips, manifestation reports, etc.).

B. If the Contractor or Subcontractor disturbs, removes, disposes, or encapsulates these materials without written authorization and instructions from the Owner or Engineer; or disturbs, removes, disposes, or encapsulates these materials in a manner not in accordance with the authorizations and instructions, the Contractor and Subcontractor shall indemnify, defend, and hold harmless the Owner and Engineer against any loss, damage, or liability arising or resulting from such unauthorized improper acts of the Contractor and Subcontractor; and further, the Owner and Engineer shall not be responsible for any such loss, damage, or liability arising or resulting from the Contractor’s or Subcontractor’s acts.

1.08 CONTRACTOR’S USE OF PREMISES

A. Contractor shall limit its use of the site for work and for storage to allow for:

1. Owner occupancy and use of the building during construction.

2. Public use of walks, parking lots, and driveways.

B. Do not block exits at any time. Provide protected entranceways at each entrance when working in these areas.

C. Coordinate work on the roof, use of the site, storage areas, and staging areas with the Owner. Limit use of the site and working hours to dates, times, and locations approved by the Owner.

D. Cooperate with the Owner’s scheduling requirements for working at an occupied building. Work under this Section shall not interfere with the operation of the building or building occupants at any time.

E. The Contractor is responsible for protecting all materials and equipment stored on the site.

F. Smoking is not permitted on the grounds.

G. Dispose of all trash and debris in a legal manner off-site. Do not throw debris from access equipment or staging. Conduct debris to approved containers on the ground. Locate debris containers only in locations approved by the Owner in advance.

PART 2 - PRODUCTS

2.01 MATERIALS

A. Provide adequate number and size of dumpsters; refuse containers, trucks, chutes, etc. for proper execution of demolition work. All demolition removal containers shall be properly protected and maintained on a daily basis. Owner must approve locations of dumpsters/refuse containers. Contractor shall submit

02050 - 5 DEMOLITION

to the Engineer, for approval, proposed methods used to conduct demolition operations and debris control.

PART 3 – EXECUTION

3.01 DUST AND FUME CONTROL

A. Contractor shall take all necessary precautions to (1) keep dust confined in the present work area and (2) prevent hazardous accumulations of dust, fumes, mists, vapors, or gases in areas occupied during construction.

B. Contractor shall submit to the Engineer, for approval, proposed methods used to contain dust and fumes in the work area. At a minimum, Contractor shall provide adequate protection at air intake units so as to prevent dust, fumes, vapors or gases from entering the facility. Contractor shall employ an industrial hygienist to monitor air quality during application of hazardous or volatile materials, if required.

3.02 DEBRIS CONTROL

A. Contractor shall remove all debris from the project site and shall legally dispose of all debris generated by the project. Debris shall be properly protected (and totally covered at the end of each work day) while on site and shall be properly secured and totally covered before it is transported. Debris shall be removed from the project site on a weekly basis or more often as required to maintain a neat clean site. Project site shall be broom swept on a daily basis.

B. Contractor shall be responsible for any damages to the building; it’s contents, and any vehicles as a result of his negligence during the demolition and/or construction process.

3.03 RODENT AND PEST CONTROL

A. Contractor is responsible to provide rodent and pest control as necessary or as required preventing infestation of construction, the building, and temporary project offices and enclosures. Employ methods and use materials that will not adversely affect conditions at the Project site or on adjacent properties.

3.04 NOISE CONTROL

A. All demolition and construction work that creates excessive noise shall be reviewed with the Owner as to the types of equipment that is intended for use during normal business hours and obtain Owner’s approval for such use. Noise limits shall conform to the requirements of the local governing body.

02050 - 6 DEMOLITION

3.05 BARRICADES

A. The Contractor shall provide and maintain suitable barriers as required to prevent public entry, and to protect the work, existing facilities, trees and plants from public construction operations; remove when no longer needed or at completion of Work. Barriers shall conform to city and state laws, ordinances and permit requirements.

B. All work areas shall be protected and well marked with fences or barriers and as required by public officials. Provide such barricades, safety and traffic control equipment, and police officer as shall be necessary to restrict traffic from work areas and protect all pedestrians, Owners, tenants, and visitors during construction. Contractor shall provide and maintain all necessary temporary barricades for safe conduct of his work, or as required by federal, state or local laws or ordinances and in accordance with OSHA requirements and other requirements of this specification.

3.06 PROTECTION OF LANDSCAPING AND PAVEMENT

A. Contractor shall protect existing landscaping and pavement areas as necessary or as required. Do not stockpile/store construction materials or debris materials in such a manner that it will permanently harm the landscaping or the pavement.

Provide temporary protection to protect landscaping and pavement.

B. Contractor shall bring back to its original conditions (repair or replace in a manner acceptable to the Engineer and Owner) any portion of the landscaping (including lawns, trees, bushes and plantings), parking areas and pavements or equipment that is damaged by the Contractor or his Subcontractors' operations.

3.07 PROTECTION OF WORK

A. Contractor shall protect the project site including the building, its contents, all streets, walls, underground and overhead utilities. All areas shall be left in a watertight condition in their entirety at all times. Contractor shall provide protective measures and materials to assure that each element will be without damage or deterioration throughout the entire construction period up to the date of final completion. Any defective elements shall be removed and replaced at the Contractor’s expense and to the satisfaction of the Engineer and Owner.

Remove protective coverings and materials at the appropriate time, but no later than final cleaning operations.

B. No work shall take place during inclement weather. No work shall take place when moisture is present on the work area or in any of the materials. The Engineer may order the work stopped when, in his opinion, the weather conditions warrants him to do so. Contractor shall take such measures as necessary to dry out work surfaces so that the work can continue with minimum delay.

02050 - 7 DEMOLITION

C. Contractor shall cover and protect all walls, windows, projections, soffits, etc.

where material is to be hoisted or removed from the roof deck. Contractor shall be responsible for all scrapes, stains, and damage to the walls and shall repair or replace any walls, windows, siding, etc., which are damaged by his operations, to the satisfaction of the Engineer and Owner. Any areas damaged shall be restored or cleaned, to the satisfaction of the Owner by the Contractor at no cost to the Owner.

D. Whenever the possibility exists that debris or materials may fall causing a hazard to persons inside or outside the building, the Contractor shall post one or more of his employees to temporarily close these hazardous areas. The person in charge of the facility shall be notified prior to the commencement of work that may pose this type of hazard. Proper barricades shall be provided to prevent normal access to or around these areas.

E. Contractor shall properly protect all areas where falling debris or dust is expected due to his operations. Contractor shall be responsible for providing adequate personnel to clean and protect these areas. Contractor shall include these costs in the bids.

F. Protect the building interior, contents, Owner's employees and customers from all hazards associated with the Contractor's operations.

G. Any damage to the interior of the building or its contents due to the Contractor's operations or to leaks during the Contractor's operations shall be corrected at the Contractor's expense to the satisfaction of the Owner and the Engineer.

H. Any damage to the exterior of the building or any roof top equipment due to the

Contractor's operations shall be corrected at the Contractor's expense or to the satisfaction of the Owner and the Engineer.

I. No member of the roof shall be overstressed due to construction loads and demolition operations. The Owner assumes no responsibility for the actual condition of the structure.

3.08 REPAIR OF DAMAGES

A. Damage to any portion of the building which results in disruption of or inconvenience to the Owner or his employees shall be immediately repaired or replaced by the Contractor. If such restitution is not promptly made, the Owner shall have the necessary work performed by an outside agency at the Contractor’s expense.

3.09 CLEANING

A. The building and adjacent areas shall be left in a broom-clean condition at the end of each day. On completion of the work of this section and after removal of all debris, the site shall be left in a clean condition satisfactory to the Owner and to the Engineer.

02050 - 8 DEMOLITION

B. At the completion of the Project, the Contractor shall restore or replace all property damaged by his Work and shall remove all spots, paint, smears, soil, concrete, mortar, sealant, adhesives, asphalt, writing, droppings, or other foreign materials, from all Work. Remove all temporary protection from all the Work.

Final cleaning shall include as a minimum:

1. Clean site; sweep paved areas, rake clean landscaped surfaces.

2. Remove waste and surplus materials, rubbish, and construction facilities from the site.

3. The Contractor shall clean all walls, windows or other building and grounds elements that have been affected by his work.

4. Repair, patch and touch-up marred surfaces to specified finish to match adjacent surfaces.

5. The Contractor shall clean the surface of the new PVC roof membrane to the satisfaction of the Engineer, manufacturer, and Owner.

END OF SECTION

06100 - 1 ROUGH CARPENTRY

SECTION 06100

ROUGH CARPENTRY

PART 1- GENERAL

A. The work of this Section consists of furnishing and installing all rough carpentry and related items as indicated on the Drawings and specified herein, required to complete the work, including but not limited to the following:

1. New wood blocking shall be installed as required to accomplish the work as specified and detailed.

2. New plywood shall be installed at vertical walls as an acceptable substrate for flashing materials, required to accomplish the work as specified and detailed.

B. All materials shall be verified by Contractor to be proper for each intended use, and the entire work of this Section shall be done in such a manner that each installation will perform its intended purpose as applicable, in the finished work.

C. The drawings indicate and show limits of construction for this project. The

D. Plans and dimensions under which the Work is to be performed are derived from a variety of sources. The existing conditions are provided for information only.

Actual conditions may vary. Contractor is required to verify existing roofing system composition, conditions, and dimensions prior to submitting his bid. No additional compensation or time extension will be made for dimensional errors or discoverable inaccuracies related to existing conditions in the contract documents.

A. Section 02050 - Demolition B. Section 07220 - Roof Insulation C. Section 07530 - PVC Roofing and Flashing

06100 - 2 ROUGH CARPENTRY

1.04 SUBMITTALS

A. Submit the following under the provisions of Section 01300:

1. Manufacturer's or applicator's specification for wood preservative treatment and treatment procedure to be sure that a satisfactory treatment will be obtained.

2. Manufacturer's specification data sheets for all fasteners to be used, clearly identifying such as their intended use.

1.05 CODES AND STANDARDS

A. Except as modified by the requirements of other governing codes and by this specification, plywood sheathing and wood blocking and its installation shall conform to the provisions and recommendations of the following codes and standards:

1. Factory Mutual Loss Prevention Data Bulletin 1-49.

2. APA: American Plywood Association.

3. American Softwood Lumber Standard P.S. 20-70

4. AWPA: (American Wood Preservers Association) C1-A11 Timber

Products Preservation Treatment by Pressure Process.

5. Conform to applicable local building code requirements.

6. Wood Blocking shall not be less than 2”x6” nominal (1 ½”x5 ½”).

1.06 CONTRACTOR’S USE OF PREMISES

2. Public use of walks, parking lots, and driveways.

B. Do not block exits at any time. Provide protected entranceways at each entrance when working in these areas.

C. Coordinate work on the roof, use of the site, storage areas, and staging areas building or building occupants at any time.

06100 - 3 ROUGH CARPENTRY

E. The Contractor is responsible for protecting all materials and equipment stored on the site.

F. Smoking is not permitted on the grounds.

G. Dispose of all trash and debris in a legal manner off-site. Do not throw debris from access equipment or staging. Conduct debris to approved containers on

2.01 DIMENSIONAL LUMBER

A. Blocking materials shall be of sound stock, new, straight, of consistent size, free of stains and mildew.

B. Blocking materials shall be kiln dried to a moisture content of not more than 19%.

Pressure treated lumber shall be kiln dried a second time after treatment.

C. Blocking materials shall be surfaced four sides and shall bear the grade and trademark of the association under whose rules it is produced, and a mark of mill identification. Materials shall be construction grade Douglas Fir, Hem-Fir, West Coat Hemlock, West Coast Fir, or Southern Yellow Pine.

D. Blocking shall be furnished in the longest practicable lengths with respect to each intended use - at least twelve feet unless shorter lengths are required and/or are specified. Single length pieces shall be used whenever possible. Wood blocking shall not be less than 2”x6” nominal.

E. All new wood blocking and nailers shall be pressure-treated with waterborne salt preservatives that will have no deleterious effect on the roofing materials.

Treatment shall be 0.40 lbs. per cubic foot of retention. Treatment shall leave a noticeable tint to wood so that treated wood can be visually differentiated from untreated wood. No oil-based pentachlorophenol or creosote treatments shall be permitted.

2.02 PLYWOOD

A. Plywood shall be 1/2” thick at wall areas to be flashed. All plywood shall be exterior grade of Group 1 or 2 species, Type CDX or better. All plywood shall have an APA stamp on it and shall meet the requirements of Product Standard PS 1-95 for Construction and Industrial Plywood.

B. All Plywood shall have a maximum moisture content of 15% by weight on a dry basis. Unless kiln dried after treatment, wolmanized plywood is not acceptable due to moisture content requirements herein.

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C. Nailers 10" wide and narrower that are indicated as plywood may be a single piece of dimensional lumber as specified in Paragraph 2.01 of this section.

Those over 10" in width shall be plywood.

2.04 FASTENERS

A. Fasteners for attaching wood blocking to wood framing members or to wood blocking shall be #10 flat head hot-dip galvanized wood screws and of sufficient length to penetrate the wood framing members and the plywood decking by 1".

Powder-actuated fasteners may not be used to fasten wood blocking or flashing.

B. Fasteners for attaching plywood decking to wood framing members shall be hot-dipped galvanized full head ring shank nails, minimum 10d size. Pneumatic fasteners may be used to fasten plywood to existing wood framing members.

C. Fasteners for attaching wood blocking or plywood to concrete shall be zinc-plated and shall have a three legged sleeve and tapered expander. The anchors shall be 3/8 in. in diameter and of sufficient length to penetrate the substrate a minimum of 1-1/2 in. Galvanized washers shall be under bolt heads to prevent excessive compression of wood.

D. Fasteners for attaching wood blocking or plywood to masonry walls or concrete walls shall be Ruffnex concrete masonry tapping screws (Phillips head flat), manufactured by Olympic Manufacturing or other approved equal and of sufficient length to penetrate the substrate a minimum of 1-1/2”.

E. If required, any existing fastener for wood blocking and plywood that are found to be deteriorated shall be replaced with new fasteners of equal or better quality and capacity.

F Fasteners for attaching wood plank roof decking to existing wood framing members shall be hot-dipped galvanized full head ring shank nails, minimum 16d size, and of sufficient length to penetrate the wood plank roof decking and wood framing members by 1 –1/4". Pneumatic fasteners may be used to fasten wood plank roof decking to existing wood framing members.

G. Nails: Galvanized steel. Sizes as required by Massachusetts State Building

Code, Appendix C, for the intended use, unless otherwise noted in the drawings or these specifications.

H. Screws: No. 10 flat head galvanized wood screws, length sufficient to penetrate substrate (stud, joist or blocking) by at least 1”, unless greater penetration required as indicated on the drawings.

06100 - 5 ROUGH CARPENTRY

PART 3 - EXECUTION

3.01 GENERAL

A. Construct all rough carpentry work called for on the drawings plumb, level, and true with tight, close fitting joints. Carpentry shall be securely attached and braced to surrounding construction, and executed in a first-class workmanship manner.

B. Blocking shall be built to the same thickness as the insulation to the maximum extent possible, within 1/16” plus or minus. Blocking shall extend at least 2” beyond edge of metal flashing.

C. At continuous blocking runs longer than two (2) feet, the minimum length of blocking shall be two (2) feet.

3.02 EXAMINATION

A. The Contractor is to exercise extreme caution when removing the existing roofing system to ensure the integrity.

B. Examine surfaces scheduled to receive repair material for unevenness, irregularities, and dampness that would affect quality and execution of work. Do not proceed with work until unsatisfactory conditions have been corrected.

C. Contractor is responsible for verification of all dimensions and existing conditions.

Contractor shall provide adequate amounts of rough carpentry products on site daily so as to ensure that the repairs are completed in a timely fashion. Delays and/or temporary roofing due to inadequate amounts of repair product will not be allowed.

D. Any damage to the interior of the building or its contents due to the Contractor's operations or to leaks during the Contractor's operations shall be corrected at the Contractor's expense to the satisfaction of the Owner and the Architect.

3.03 FASTENING

A. All blocking and plywood shall be fastened to meet or exceed Factory Mutual’s requirements and/or recommendations.

B. Fasteners for wood blocking shall be staggered and spaced 12" o.c. when secured to wood blocking or structural decking. The staggered fastening pattern shall be increased within 12 feet from outside corners to 6” on center. Smaller pieces of blocking, such as penetrations, shall have a minimum of four fasteners per piece. A fastener shall be located no more than four inches from the end of each piece of blocking. Two fasteners are required at the ends of all blocking.

Fasteners to penetrate the substrate a minimum of 1-1/4” attaching to wood blocking or 1-1/2” when attaching to steel, concrete, or masonry.

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C. Counterbore at all bolt heads, nuts, and washers as may be required to provide a flush surface for installation of roofing membrane materials.

D. Plywood used at wall flashing areas shall be securely fastened to the substrate at the top, middle and bottom with the approved fastener at 6” on center. When used in layers, each layer of plywood shall be secured equally, with fastener spacing as specified herein.

07220 - 1 ROOF INSULATION

SECTION 07220

ROOF INSULATION

A. The work of this Section consists of furnishing and installing all roofing insulation and related items as indicated on the Drawing and specified herein, required to complete the work. The roofing replacement insulation shall be as follows:

Polyisocyanurate Insulation (two layers of 2.0”), compressive strength shall be 20 psi. Insulation to be mechanically fastened to the steel roof decking and cementitious wood fiber roof decking in accordance with a FM 1-75 fastening rate and pattern; .060” mil PVC membrane adhered.

Actual conditions may vary. Contractor is required to verify existing roofing system composition, conditions, and dimensions prior to submitting his bid. No additional compensation or time extension will be made for dimensional errors or

1.03 QUALITY ASSURANCE

A. All materials used as a component of the roofing system shall be supplied or approved in writing by the roofing system manufacturer. All materials shall be installed to serve their intended function.

B. All work shall be applied in strict accordance with the provisions of the technical specification and details. No deviations shall be permitted without written consent from the Engineer. Should a conflict between this specification (and the associated details) and the manufacturer's requirements arise, the most

07220 - 2 ROOF INSULATION

restrictive provision, as determined by the Engineer, shall govern.

C. The insulation manufacturer's technical representative (not a salesperson) shall visit the site at the initial application of his product and as often as required by the Contractor and Engineer to ensure the specifications, details, requirements and recommendations are followed. Upon completion of the installation, an inspection shall be made by the technical representative to ascertain that the roofing insulation has been installed according to the specifications and details and will be accepted by the manufacturer and that the manufacturer will issue the specified warranty.

1.04 RELATED WORK UNDER OTHER SECTIONS

B. Section 06100 - Rough Carpentry C. Section 07530 - PVC Roofing and Flashing

1.05 SUBMITTALS

A. Submit the following under the provisions of Section 01300.

1. A letter from the insulation manufacturer and adhesive manufacturer, stating that the insulation and adhesive, specified for this project are acceptable (accepting the technical specification and details); stating that the specified guarantee will be issued; and stating that a technical representative will be on site as often as required by the Contractor and Engineer

2. Manufacturer's data sheet for each type of insulation.

3. Manufacturer's Material Safety Data Sheets for all products specified in this Section.

4. Manufacturer’s data sheet for the cold process insulation adhesive.

5. Manufacturer shop drawing; insulation fastening pattern shall be submitted for review and approval. The drawing shall indicate complete layout and fastening pattern for all roof areas, including the field, perimeters, and corners.

1.06 GUARANTEE

A. Polyisocyanurate insulation and fasteners shall be included in the roof membrane manufacturer's 20-year full system warranty. During this period, manufacturer shall make good at his own expense any faults or imperfections that may arise due to defects in the materials as well as from defects in the workmanship

07220 - 3 ROOF INSULATION

involved in their installation. Such repairs shall be made as promptly after observation as weather and site conditions permit.

1.07 CODES AND STANDARDS

specification, insulation and its installation shall conform to the provisions and recommendations of the following codes and standards:

1. Insulation shall have Factory Mutual Class I approval (FM 4470 Approval

Standard).

2. Mechanical attachment of insulation shall meet or exceed Factory Mutual's latest wind uplift FM 1-75 fastening pattern for PVC roofing applications over steel decking.

3. Insulation shall have Factory Mutual approval for the system specified.

4. Insulation shall carry Underwriters Laboratory rating for fire resistance.

5. Roofing and Waterproofing Manual (5th edition) published by the National Roofing Contractors Association (NRCA), 10255 W. Higgins Road, Suite 600, Rosemont, Ill. 60018-5607.

6. Local and applicable building codes.

7. ASTM C 1289 – Standard specification for faced rigid cellular polyisocyanurate insulation board.

8. LTTR – Long Term Thermal Resistance, using techniques from CAN/ULC S770 based on ASTM C1303.

1.08 TRANSPORTATION AND HANDLING

A. Transport and handle products in accordance with manufacturer's instructions.

B. Promptly inspect shipments to assure that products comply with requirements, quantities are correct, and products are undamaged.

C. Provide equipment and personnel to handle products by methods to prevent soiling, disfigurement, or damage.

1.09 STORAGE AND PROTECTION

A. Contractor shall follow the recommended storage procedures of the manufacturer of the materials being used. No storage on or within the building will be allowed without written permission from the Owner. Any materials brought to the roof for daily operations or storage shall be evenly distributed on the roof to prevent concentrated loads and shall not overload the structure.

07220 - 4 ROOF INSULATION

B. All moisture sensitive materials shall be stored in weatherproof trailers or temporary protective shelters and shall be stored at least 4 inches above the ground on stable pallets or skids and shall at all times be completely covered and secured. Tarpaulins or a similar "breathable" material shall be used to cover materials. Rubber or plastic materials shall not be acceptable. Factory applied "shrink packs" or plastic wrappings shall not be acceptable.

C. Materials stored on the ground shall be thoroughly secured against moisture and wind. Materials and their coverings shall be tied and/or weighted to prevent uncovering or blowing of material by the wind. Contractor shall be responsible for damages caused by blowing and improperly stored material and equipment.

D. Materials shall be handled with care and shall not be installed if they have been damaged in any way due to handling, storage or manufacturing defects.

Contractor shall promptly mark and remove from the site any damaged or improperly stored materials when so requested by the Engineer.

E. All materials are to be stored at the recommended temperature range as specified by the manufacturer. Contractor shall provide manufacturer’s information to the Engineer concerning storage and handling of flammable or volatiles materials. The “shelf life” materials shall be provided with the date of manufacturer of all perishables. Materials that become congealed, thick, non-uniform or otherwise unsuitable for proper application shall be removed from the project site and replaced with new properly stored and tested materials.

F. Provisions for placement of the Contractor's equipment must be planned by the

Contractor and submitted to the Owner and the Engineer for approval.

G. Provide off-site storage and protection when site does not permit on-site storage or protection.

1.10 WEATHER AND TEMPERATURE REQUIREMENTS

A. Work shall not commence or proceed, with the exception of the completion of necessary temporary measures to make the building weathertight, when the ambient air temperature is below 32°F unless otherwise specified.

B. Work shall not commence or proceed, with the exception of the completion of necessary temporary measures to make the building weathertight, when precipitation of any kind, or winds in excess of 20 miles per hour are present or imminent or when, in the sole judgment of the Engineer or his authorized representatives, conditions are unfavorable or detrimental to the proper installation of the systems.

C. Work shall not commence or proceed, with the exception of the completion of necessary temporary measure to make the building weathertight, when water, ice or frost is present on or within the materials or surfaces to which materials are to be applied.

07220 - 5 ROOF INSULATION

D. Work shall not commence or proceed with the exception of the completion of necessary temporary measures to make the building weathertight when the temperature is too hot to allow proper installation, or when existing or previously installed work is being damaged by the application, or when temperature conditions present a health or safety hazard to the workers on the site.

1.11 COORDINATION

A. Coordinate all work of this section with other trades. Perform all insulation work in a timely manner as not to delay other trades. The Contractor shall coordinate all work with the roofing and waterproofing trades, to prevent exposure of the building to inclement weather and leaks, at all times.

1.12 CONTRACTOR’S USE OF PREMISES

2. Public use of walks, parking lots, and driveways.

B. Do not block exits at any time. Provide protected entranceways at each entrance when working in these areas.

C. Coordinate work on the roof, use of the site, storage areas, and staging areas locations approved by the Owner on the site.

F. Smoking is not permitted on the grounds.

G. Dispose of all trash and debris in a legal manner off-site. Do not throw debris from access equipment or staging. Conduct debris to approved containers on

PART 2 – PRODUCTS

07220 - 6 ROOF INSULATION

2.01 INSULATION

A. Approved polyisocyanurate insulation boards, as supplied by the roofing membrane manufacturer, shall be rigid, closed-cell HCFC FREE polyisocyanurate foam core insulation, integrally bonded to heavy non-asphaltic fiber-reinforced felt facers (top and bottom surface) in the foaming process.

Insulation shall meet: FM Standard 4450/4470 Approval; UL Standard 790 (ASTM E 108) Classification; UL Standard 263 Fire Resistance Classification (ASTM E 119). Insulation shall adhere to the following typical physical properties:

PROPERTY TEST METHOD VALUE

*Thermal Performance ASTM C1289 Min. Average CAN/ULC S770 R-value

Water Absorption % Volume ASTM C 209 <1% <3.5%

ASTM D 2842

Dimensional Stability ASTM D 2126 Less than 2%

(Length & Width)

Compressive Strength ASTM D 1621 20-psi min.

Foam Core Density ASTM D 1622 2.0 pcf nominal

Moisture Vapor Transmission ASTM E 96 <1.5 perm

Flame Spread ASTM E-84 25 – 50

* The thermal performance shall be the Long Term Thermal Resistance (LTTR) value, determined in accordance with CAN/ULC S 770 test method.

2.02 INSULATION ADHESIVE

A. Insulation adhesive shall be two-component polyurethane roof insulation adhesive designed to attach rigid board polyisocyanurate roof insulation boards to each other and to concrete roof decking. Contractor shall arrange for the insulation manufacturer to perform a proper amount of insulation adhesive uplift resistance tests for the proposed insulation adhesive product (minimum of 2 tests are required); submittal of the results is required for approval prior to installation.

B. Insulation adhesive shall be supplied by the roof membrane manufacturer or as required by the roof membrane manufacturer so as to obtain the specified wind uplift requirements and roof membrane manufacturer’s 20-year full systems warranty. Acceptable product and manufacturer is as follows: OlyBond 500 Adhesive Fastener manufactured by OMG Roofing Products, Agawam, MA, or approved equal.

2.03 INSULATION ATTACHMENT

07220 - 7 ROOF INSULATION

A. Insulation fasteners and distribution plates shall be used for the securement of insulation to the steel roof decking. Contractor shall arrange for the insulation manufacturer to perform a proper amount of fastener pullouts for each proposed fastener; submittal of the results is required for approval prior to installation.

Insulation fasteners and distribution plates shall be supplied by the roof membrane manufacturer or as required by the roof membrane manufacturer so as to obtain the specified roof membrane manufacturer’s full system 20-year (at go-over areas) full system warranty shall adhere to the following:

• All fasteners shall meet all published requirements of corrosion resistance by roofing materials manufacturers. The fastener must be Factory Mutual approved and made in America. The fastener shall be coated with CR-10 corrosion resistant coating. When subjected to 30 Kesternich cycles (DIN 50018), the fastener must show less than 15% red dust and surpass Factory Mutual Research Approval Standard #4470.

• Fasteners for use over steel roof decks shall be Heavy Duty Roofing

Fastener type with a shank diameter of .190, a minimum diameter thread of .245, Head Diameter of .435, and a #3 Phillips Truss Head Style. The fastener must have 10 threads per inch and have a 30° spade point. The fastener shall be of sufficient length to penetrate the top flute of the steel roof decking by 1”.

• Fasteners shall include a corrosion resistant Factory Mutual approved low profile pressure plate, steel hot-dipped galvanized (AZ –55) plate fabricated of SAE 1010 steel (3 inch diameter).

3.01 PREPARATION

A. Surface on which the system is to be applied shall be clean, smooth, dry, and free of fins, sharp edges, loose/foreign materials, oil and grease. Before beginning work, a technical representative of the insulation manufacturer shall examine the surfaces in order to ensure that the substrate is acceptable. Prior to starting the work, the Contractor shall notify the Engineer that the substrate is ready for insulation attachment. Thoroughly clean the surface of all debris, loose material, and other deleterious materials prior to installation of insulation.

B. Material with imperfections such as pinholes, cracks, handling damage, incorrect thickness (less than specified), etc. shall be rejected and removed immediately from job site.

C. No work shall take place when moisture is present on the roof or in any of the materials. The Engineer may order the work to stop when, in his opinion, the

07220 - 8 ROOF INSULATION

weather conditions warrant him to do so. Contractor shall take such measures as the work can continue with minimum delay so the exposure of building and its contents is minimum.

D. After the existing roof systems are removed, the existing roof deck shall be dried out before installation of new roofing materials. After materials have been removed, the substrate shall be scraped clean of all remaining insulation, lumps of asphalt, concrete/grout, or other surface imperfections. After all scraping and cleaning is complete and after substrate is dry, Contractor shall inspect the surface to determine that it is smooth and uniform to receive the new insulation.

Repair any damaged and/or deteriorated decking as required.

E. Verify that roof drains, roof curbs, nailers, equipment supports, vents, and other roof accessories are secured properly and installed in conformance with the specifications and drawings.

3.02 INSTALLATION ATTACHMENT (ADHESIVE)

A. Insulation board shall be attached to the cementitious wood fiber roof decking using approved insulation adhesive. Insulation board shall be attached to insulation board using approved insulation adhesive. Application rate and pattern shall be done in accordance with the approved shop drawing.

B. Apply insulation adhesive directly to approved insulation using continuous ribbons of adhesive beads. Place insulation boards into position after allowing adhesive to rise 3/4” to 1”. Insulation boards shall be stepped in and/or weighted for a proper timeframe to ensure the adhesive has adequately secured the components (roof insulation to roof deck and roof insulation to roof insulation).

C. The Contractor shall provide for technical representation by the insulation adhesive manufacturer at all times when the adhesive is being applied for the first three days of use and once every three days thereafter to ensure that proper adhesion is obtained. Simulated uplift resistance field-tests (in accordance with ANSI/SPRI IA-1, 2005 Standard) shall be performed by the insulation adhesive manufacturer representative on completed work areas to ensure that the insulation adhesive is being installed as specified. Field-tests shall be done in various locations as recommended by the manufacturer (a minimum of 6 tests is required). The Contractor shall provide to the Owner and Engineer a report documenting the results of the tests.

D. The Contractor is required to correct all roof areas that fail the uplift resistance test. Correction may include removal and replacement of the area or may simply include augmentation with mechanical fasteners where practical.

3.03 INSTALLATION (MECHANICAL ATTACHMENT)

A. Install specified products using approved mechanical fasteners in accordance with the specifications, details, manufacturer’s latest written requirements, and as

07220 - 9 ROOF INSULATION

required by governing codes and standards.

B. Insulation board shall be mechanically attached to the steel roof decking using approved fasteners and insulation plates. Fastening rate and pattern shall be done in accordance with the approved shop drawing.

E. Use fastener tools with a depth locator as recommended or supplied by the fastener manufacturer to ensure proper installation. Install the fastener using manufacturer-approved screwshooter. Drive the fastener until a slight depression is seen around the plate. Proper length fasteners are critical and excessive lengths will not be allowed. The fasteners shall be of sufficient length to penetrate the top flute of the steel roof decking by 1”.

F. Care must be taken not to overdrive the fastener and fracture the skin of the insulation board. Fastener must be tight enough so that the plate does not turn.

Any overdriven fasteners and/or damaged insulation board shall be the responsibility of the Contractor and shall be replaced immediately at no additional cost to the Owner.

07530 - 1 PVC ROOFING AND FLASHING

SECTION 07530

PVC ROOFING AND FLASHING

A. The work of this Section consists of furnishing and installing all PVC roofing membrane system components as indicated on the Drawing and specified herein, required to complete the work.

1. An adhered reinforced PVC roof membrane system is specified and detailed complete with a manufacturer’s 20-year full system warranty. The overall polymer thickness of the PVC roof membrane field sheet shall be a minimum of 60-mils.

Actual conditions may vary. Contractor is required to verify existing roofing system composition, conditions, and dimensions prior to submitting his bid. No additional compensation or time extension will be made for dimensional errors or

B. Section 06100 - Rough Carpentry C. Section 07220 - Roof Insulation

07530 - 2 PVC ROOFING AND FLASHING

1.04 QUALITY ASSURANCE

A. All materials used as a component of the roofing system shall be supplied or installed to serve their intended function. All materials used in the reinforced PVC roof membrane system shall be manufactured and supplied by one system manufacturer.

B. A licensed contractor approved and certified by the PVC roof membrane system manufacturer and employing personnel experienced and skilled in the application of the manufacturer’s roofing system shall install the complete roofing and flashing system. The Roofing Contractor shall be experienced in the installation of warranted, PVC roof membrane systems. Minimum required experience involves at least 5-years experience installing PVC roof membrane systems and the successful installation of at least five (5) projects of similar scope, size and complexity, located in Massachusetts, where the Roofing Contractor has installed a PVC roof membrane system. All such references must be provided with the Contractor’s Bid and shall include the following:

(1) Name and address of project indicating size and roofing membrane system type and manufacturer, for each of the five (5) referenced projects.

(2) Name and phone number of contact person (Owner and/or Designer), for each of the five (5) referenced projects.

(3) Written letter of “Certification” or “Approval” from the Roofing System Manufacturer showing that the Roofing Contractor has been “Certified” or “Approved” by the Roofing System Manufacturer for a minimum of five (5) years.

C. All work shall be applied in strict accordance with the provisions of the technical specification and details. No deviations shall be permitted without written consent from the Engineer. Should a conflict between this specification (and the associated details) and the manufacturer's requirements arise, the most restrictive provision, as determined by the Engineer, shall govern.

D. At least one week prior to commencement of the construction work, a conference

(preconstruction meeting) shall be held and attended by the Engineer, Contractor, Owner, Owner’s Project Manager, and a technical representative of the PVC roof membrane system manufacturer. The purpose of this conference is to review the specifications, details, application requirements, and schedule before construction operations begin.

E. All materials used as a component of the roofing system shall be supplied or installed to serve their intended function.

F. No member of the roof shall be overstressed due to construction loads.

07530 - 3 PVC ROOFING AND FLASHING

G. Contractor is to provide any necessary protection to the installed work prior to acceptance by the Owner and Engineer. The Contractor at no additional cost to the Owner shall correct any damage incurred during this period.

H. Contractor is to provide any and all necessary protection to the entire roof area to maintain watertightness during the project duration, including existing roof areas not yet roofed. Any interior damages that occur as a result of the Contractor's negligence shall become the Contractor's responsibility and he shall promptly repair and/or replace the damaged items.

I. The roof membrane manufacturer's technical representative (not a salesperson) shall visit the site during the bidding period and certify in writing the materials specified are proper for their particular application.