07_27_00_45_10.pdf

BEC - PHASE III JUNE 20, 2013

NEW YORK DISTRICT USACOE - PICATINNY AMENDMENT

SECTION 07 27 00.45 10

BUILDING AIR BARRIER SYSTEM

05/12

PART 1 GENERAL

1.1 CONTRACTOR RESPONSIBILITY

The Contractor is responsible for the construction of an air barrier system that is contiguous and connected across the six surfaces of the building envelope meeting the performance requirements as outlined in this specification.

Perform a building thermography test to demonstrate that the building envelope is properly sealed and insulated. The testing shall be performed in accordance with the procedures outlined in this specification

1.2 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

ASTM INTERNATIONAL (ASTM)

ASTM C1060 (2011a) Standard Practice for Thermographic Inspection of Insulation Installations in Envelope Cavities of Frame Buildings

ASTM D4541 (2009e1) Pull-Off Strength of Coatings Using Portable Adhesion Testers

INTERNATIONAL ORGANIZATION FOR STANDARDIZATION (ISO)

ISO 6781 (1983) Thermal Insulation - Qualitative Detection of Thermal Irregularities in Building Envelopes - Infrared Method

1.3 SUBMITTALS

Government approval is required for submittals with a "G" designation;

submittals not having a "G" designation are for information only. When used, a designation following the "G" designation identifies the office that will review the submittal for the Government. Submit the following in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:

SD-03 Product Data

Air Barrier System ; C, CP Thermography Test Procedures; C, CP

SD-06 Test Reports

Test Report ; C, CP Thermography Test Report; C, CP

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SD-07 Certificates

Air Barrier Inspector ; G, RO

1.4 ADMINISTRATIVE AND PROCEDURAL REQUIREMENTS

This section includes administrative and procedural requirements for accomplishing an airtight building enclosure that controls infiltration or exfiltration of air.

a. Coordinate between the trades, the proper scheduling and sequencing of the work, preconstruction meetings, inspections, tests, and related actions including inspection and test reports.

b. Ensure that all penetrations through the air barrier system, and all paths of air infiltration or exfiltration, are sealed airtight.

1.4.1 Air Barrier System

A breathable liquid-applied air barrier applied to the CMU walls shall be part of the air barrier system. The airtight components of the building enclosure and the joints, junctures and transitions between materials, products, and assemblies forming the airtightness of the building enclosure are called the air barrier system.

1.4.2 Air Barrier System Characteristics

Ensure that the intent of constructing the building enclosure with a continuous air and moisture barrier system to control air leakage into or out of the conditioned space is achieved. The air barrier system shall have the following characteristics:

a. Continuous with all joints sealed.

b. Structurally supported to withstand positive and negative air pressures applied to the building enclosure.

c. Connection shall be made between:

(1) Foundation and walls

(3) Walls and doors

(4) Different wall systems

(5) Walls and roof

(6) Walls and roof over unconditioned space

(7) Walls, floors, and roofs across construction, control, and expansion joints.

(8) Walls, floors, and roofs to utility, pipe and duct penetrations.

1.4.3 Inspection and Testing Services

Inspection services are required to verify compliance with requirements specified or indicated. The inspection agency shall submit a certified written test report, in duplicate, of each inspection, test, or similar service to the Contractor with duplicate copies to the Contracting Officer not later than 10 days after each test.

Written reports of each inspection or similar service shall include the following information:

a. Date of Issue

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b. Project title and number

c. Name, address, and telephone number of testing agency

d. Dates and locations of samples or inspections

e. Names of individuals making the inspection

f. Designation of the Work method

g. Identification of product and Specification Section

h. Complete inspection data

i. Comments or professional opinion on whether inspected or tested Work complies with Contract Document requirements

j. Name and signature of laboratory inspector

1.5 QUALITY CONTROL

Engage the services of an experienced air barrier inspector to oversee the sequencing and installation of the air barrier component materials and assemblies, to oversee the proper joining and sealing of the materials and assemblies, to oversee the sealing of penetrations of the air barrier materials and assemblies, and to instruct the subcontractors on the above.

1.5.1 Qualifications

The inspector shall have 2 years experience in the installation of air barrier materials and assemblies including the experience in joining and sealing various components, and sealing of penetrations of air barriers.

The inspector shall have experience coordinating and instructing subcontractors involved in the installation joining an sealing of air barrier materials and components.

1.5.2 Documentation and Reporting

Installers shall document the entire installation process on daily job site reports. These reports include information on the Installer, substrates, substrate preparation, products used, photos, ambient and substrate temperature, the location of the air barrier installation,and results of the quality control procedures.

1.6 CONTRACTOR RESPONSIBILITIES

1.6.1 Coordination of Sub-Contractor(s)

Provide coordination between the Sub-Contractors involved in the construction of the air barrier system, coordinate the sequence of construction to ensure continuity of the air barrier system joints, junctures, penetrations, and transitions between materials and assemblies of materials and products from substructure to walls to roof. Provide quality assurance procedures, and verification as specified. Facilitate inspections, and other quality control services specified elsewhere in the Contract Documents and required by the Contracting Officer.

1.6.2 Pre-Construction Conferences

Organize pre-construction conferences between the sub-contractors involved in the construction of or penetration of the air barrier system and the air barrier inspector to discuss where each sub-contractor begins and ends, the sequence of installation, and each sub-contractor's responsibility to ensure airtight joints, junctures, penetrations and transitions between materials, products, and assemblies of products specified in the different sections to be installed by the different sub-contractors.

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1.6.3 Construction Mock-Up

Build a construction mock-up of every joint, juncture, and transition between materials, products, and assemblies of products specified in the different sections to be installed. Work will not begin until the mock-up is satisfactory to the Contracting Officer.

PART 2 PRODUCTS

2.1 FLUID APPLIED VAPOR PERMEABLE AIR BARRIER

Fluid Applied Vapor Permeable Air Barrier membrane is a one-component solvent based, polymer modified bitumen, liquid membrane designed to resist air leakage when applied to surfaces while remaining permeable to passage of water vapor. Fluid applied with trowel; excellent adhesion to masonry, concrete, stone, wood, gypsum board, rigid insulation, and metal. Seals around projections such as brick ties. Cures to a flexible film with minimal shrinkage after curing and provides crack filling as well as bridging capabilities.

a. Solids by Weights: 68 percent.

b. Maximum VOC: Less than 250 g/L.

c. Water Vapor Permeance: At 1/8-inch film - 7 perms per ASTM E 96/E 96M.

d. Air Permeability per ASTM E 283:

Pressure (lbs/sq.ft.) Air Leakage Rate (CFM/sq.ft.)

1.6 0.01080 0.0014

5.2 0.0240 0.0036

10.5 0.0358 0.0052

2.2 FLUID APPLIED AIR/VAPOR BARRIER MEMBRANE

Fluid Applied Air/Vapor Barrier membrane shall be a one-component liquid applied, elastomeric membrane designed to provide an air and vapor barrier when applied to construction surfaces. Cures to a tough monolithic rubber-like membrane, which resists air leakage.

Fluid applied vapor permeable air barrier, when applied, shall be a seamless, elastomeric membrane that will bridge cracks and retains flexibility over a wide temperature range. Product may be spray applied and will not affect polystyrene insulation. Product may be allied to masonry, concrete or gypsum board.

Provide Fluid Applied Vapor Permeable Air Barrier membrane with following properties:

a. Water Vapor Permeance: ASTM E 96/E 96M; 0.08 perms. Comparison of treated and untreated specimens.

b. Air Permeability: Shall meet New Jersey Energy Code

1) Air permeability shall meet the following results on product applied to concrete wall:

Pressure (lbs/sq. ft.) Air Leakage (CFM/sq. ft.)

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1.6 0.00012

5.2 0.00014

10.4 0.00020

c. Chemical Resistance: Resists salt solutions, mild acids and alkalis.

Non-resistant to oils or solvents.

d. Tensile Strength: 120 psi, ASTM D 412.

e. Elongation: 800 percent, ASTM D 412.

f. Peel Strength (Concrete): 25 lbs per inch width, ASTM C 836.

g. VOC: Maximum 100 grams/liter.

2.3 ACCESSORIES

Provide manufacturer's approved accessories, primers, and patching materials necessary for complete installation.

PART 3 EXECUTION

3.1 REPAIR AND PROTECTION

Upon completion of inspection or sample taking and similar services, repair damaged construction and restore substrates and finishes, protect construction exposed by or for quality control service activities, and protect repaired construction.

3.2 TESTING AND INSPECTION

The following qualitative and quantitative tests and inspections shall be conducted in the presence of the Contracting Officer during installation of the air barrier system.

a. Qualitative Testing and Inspection:

(1) Provide a Daily Report of Observations with a copy to the Contracting Officer.

(2) Ensure continuity of the air barrier system throughout the building enclosure and that all gaps are covered, the covering is structurally sound, and all penetrations are sealed allowing for no infiltration or exfiltration through the air barrier system.

(3) Ensure structural support of the air barrier system to withstand design air pressures.

(4) Ensure masonry and concrete surfaces are smooth, clean, and free of cavities, protrusions and mortar droppings, with mortar joints struck flush or as required by the manufacturer of the air barrier material.

(5) Ensure site conditions for application temperature, and dryness of substrates are within guidelines.

(6) Ensure substrate surfaces are properly primed.

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(7) Ensure laps in materials are at least a 2-inch minimum, shingled in the correct direction or mastic applied on exposed edges with no fishmouths.

(8) Ensure that mastic is applied on cut edges.

(9) Ensure that a roller has been used to enhance adhesion.

(10) Measure application thickness of liquid applied materials to manufacturer's specifications for the specific substrate.

(11) Ensure that the correct materials are installed for compatibility.

(12) Ensure proper transitions for change in direction and structural support at gaps.

(13) Ensure proper connection between assemblies (membrane and sealants) for cleaning, preparation and priming of surfaces, structural support, integrity and continuity of seal.

b. Quantitative Tests:

(1) Provide written test reports of all tests performed with a copy to the Contracting Officer.

(2) Determine the bond strength of coatings to substrate in accordance with ASTM D4541.

3.3 THERMOGRAPHY TEST

Test the building envelope using Infrared Thermography technology. The thermography testing shall be completed in accordance with the requirements of ASTM C1060 and ISO 6781. The Contracting Officer will witness the testing.

3.3.1 Thermography Test Procedures

Submit detailed test procedures indicating the test apparatus, the test methods and procedures, and the analysis methods to be employed not later than 60 days after Notice to Proceed.

3.3.2 Thermography Test Report

Provide a report. The report shall include thermographs in color and a color temperature scale to define the temperature indicated by the various colors. The report shall identify the high temperature reading, the outdoor air temperature, the building indoor air temperature, and the wind speed and direction. The report shall note any areas of compromise in the building envelope, and shall note all actions required and taken to correct those areas.

3.3.3 Final Test

Final thermography test report shall demonstrate the problem areas have been corrected. Submit the complete test and analysis for review and approval.

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