072727 Fluid-Applied Membrane Air Barrier- Vapor amendment 1.pdf

08/13/2021 100% Final Construction Documents Complete Unfinished Specialty Clinic Project Number 589A4-20-155

VA 08-01-12

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SECTION 07 27 27

FLUID-APPLIED MEMBRANE AIR BARRIERS, VAPOR RETARDING

Issued Amendment 1, dated 08/13/2021

PART 1 - GENERAL

1.1 DESCRIPTION:

This section specifies fluid-applied vapor-retarding membrane air barrier material and accessories used for exterior above grade wall assembly air barriers and their extension and connection to adjacent air barrier components in roof and opening construction to provide a durable, continuous, air- and moisture- impermeable full-building system.

1.2 RELATED WORK

A. General sustainable design documentation requirements: Section 01 81 11 SUSTAINABLE

DESIGN REQUIREMENTS.

B. Flashing components of factory finished roofing and wall systems to which membrane air barriers will transition: Division 07 roofing and wall system sections.

C. Other flashing components to which membrane air barriers will transition: Section 07 60 00

FLASHING AND SHEET METAL.

D. Joint Sealants: Section 07 92 00, JOINT SEALANTS.

E. Wall sheathings serving as substrate for membrane air barriers: Section 09 29 00 GYPSUM

BOARD.

1.3 APPLICABLE PUBLICATIONS

A. Publications listed below form a part of this specification to the extent referenced. Publications are referenced in the text by the basic designation only. Editions of applicable publications current on date of issue of bidding documents apply unless otherwise indicated.

1. 1. Air Barrier Association of America (ABAA): Quality Assurance Program

2. American Society of Testing and Materials (ASTM):

C920-10 ...................................... Standard Specification for Elastomeric Joint Sealants

C1193-09 .................................... Standard Guide for Use of Joint Sealants

D412-06 ...................................... Standard Test Methods for Vulcanized Rubber and

Thermoplastic Elastomers—Tension

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D2369-10 .................................... Standard Test Method for Volatile Content of Coatings

E96/E96M-05 ............................. Standard Test Methods for Water Vapor Transmission of

Materials

E162-09 ...................................... Standard Test Method for Surface Flammability of Materials

Using a Radiant Heat Energy Source

E783-02 ...................................... Standard Test Method for Field Measurement of Air Leakage

Through Installed Exterior Windows and Doors

E1186-03(2009) .......................... Standard Practices for Air Leakage Site Detection in Building

Envelopes and Air Barrier Systems

E2178-03 .................................... Standard Test Method for Air Permeance of Building Materials

E2357-05 .................................... Standard Test Method for Determining Air Leakage of Air

Barrier Assemblies

3. U.S. Environmental Protection Agency (EPA):

40 CFR 59, Subpart D ................. National Volatile Organic Compound Emission Standards for

Consumer and Commercial Products

4. SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT (SCAQMD):

1168-89(2003) ............................ Adhesive and Sealant Applications

1.4 PERFORMANCE REQUIREMENTS

A. General: Membrane air barrier shall be capable of performing as a continuous vapor-impermeable air barrier and as a moisture drainage plane transitioned to adjacent flashings and discharging water to the building exterior. Membrane air barriers shall accommodate substrate movement and seal expansion and control joints, construction material transitions, opening transitions, penetrations, and perimeter conditions without moisture deterioration and air leakage exceeding performance requirements.

B. Air-Barrier Assembly Air Leakage: Maximum 0.2 L/s x sq. m of surface area at 75 Pa (0.04 cfm/sq. ft. of surface area at 1.57 lbf/sq. ft.)per ASTM E 2357.

C. Material Compatibility: Provide membrane air barrier materials that are compatible with one another and with adjacent materials under conditions of service and application required, as demonstrated by membrane air barrier manufacturer based on testing and field experience.

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1.5 QUALIFICATIONS:

A. Approvals: Approval by Contracting Officer is required of products and services of proposed manufacturers, and installers, and will be based upon submission by Contractor that:

B. Manufacturer Qualifications: Manufacturer regularly and presently manufactures fluid-applied membrane air barrier material meeting section requirements as one of its principal products.

1. Manufacturer's product submitted has been in satisfactory and efficient operation on five similar installations for at least five years.

a. Submit list of installations, include name and location of project and name of owner.

2. Accreditation: Manufacturer is accredited by the Air Barrier Association of America.

C. Installer Qualifications: Installer has technical qualifications, experience, certifications, trained personnel, membrane air barrier manufacturer's approval, and facilities to install specified items.

1. Accreditation: Installer shall be accredited by the Air Barrier Association of America (ABAA) and whose installers are certified in accordance with the site Quality Assurance Program used by ABAA.2. Installer's applicators shall be trained and certified by manufacturer of air barrier system.

3. Installer's full time on-site field supervisor shall have completed three projects of similar scope within last year, be able to communicate verbally with Contractor, Architect, testing agency, and employees.

a. Certification: Installer's supervisor shall hold Sealant, Waterproofing, and Restoration

Institute (SWRI) Wall Coating Validation Program Certificate, or similar qualification acceptable to Resident Engineer.

b. Accreditation: Installer's supervisor shall be a Level 3 Accredited Installer by the

ABAA.

D. Testing Agency Qualifications: Testing laboratory accredited by International Accreditation

Service, Inc. or American Association for Laboratory Accreditation.

1. Testing agencies personnel shall be experienced in the installation of specified air barrier system and qualified to perform observation and inspection specified in Field Quality

Control Article to determine Installer’s compliance with the requirements of this Project.

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2. Accreditation: Contractor's testing agency performing Field Quality Control testing and inspection shall also be certified by ABAA to perform ABAA Quality Assurance Program installer audits.

1.6 SUBMITTALS:

A. Submit in accordance with Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA, AND SAMPLES.

B. Manufacturer's Literature and Data:

1. Fluid-applied membrane air barrier.

2. Primer.

3. Mastic.

4. Counterflashing strip.

5. Modified bituminous strip.

6. Sprayed polyurethane foam sealant.

7. Opening transition assembly.

8. Joint sealant.

9. Printed installation instructions for conditions specified.

C. Certificates:

1. Indicating membrane air barrier manufacturer's qualifications as specified.

2. Indicating approval of installer by membrane air barrier manufacturer.

3. Indicating qualifications of installer and installer's personnel.

4. Indicating air barrier manufacturer's determination that proposed materials are chemically and adhesively compatible with adjacent materials.

5. Indicating products meet project limitations on VOC content.

D. Inspection Reports: Daily reports of testing agency and reports of testing and inspection agency.

Include weather conditions, description of work performed, tests performed, defective work observed, and corrective actions taken to correct defective work.

1.7 COORDINATION:

A. Coordinate installation of work of this Section with adjacent and related work to ensure provision of continuous, unbroken, durable air barrier system.

B. Installation Audit: Incorporate audit requirements of ABAA QAP. Coordinate and cooperate with ABAA auditors. Ensure air barrier assembly remains exposed to facilitate inspection, testing, and correction activities.

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1.8 PRODUCT DELIVERY, STORAGE AND HANDLING:

A. Deliver materials to job in manufacturer's original unopened containers.

B. Do not store material in areas where temperature is lower than 10 degrees C (50 degrees F,) or where prolonged temperature is above 32 degrees C (90 degrees F).

1.9 ENVIRONMENTAL REQUIREMENTS:

Ambient Surface and Material Conditions: Not less than 4 degrees C (40 degrees F), during application of waterproofing, visibly dry, and complying with manufacturer's written instructions.

1.10 WARRANTY:

Warrant membrane air barrier installation against air and moisture leaks subject to terms of

"Warranty of Construction", FAR clause 52.246-21, except that warranty period is two years.

PART 2 - PRODUCTS

2.1 MATERIALS

A. Source Limitations: Obtain membrane air barrier materials and accessories from single manufacturer.

B. VOC Content: Maximum 250 g/L per 40 CFR 59, Subpart D (EPA Method 24).

2.2 MEMBRANE AIR BARRIER:

A. Fluid-Applied, Vapor-Retarding Membrane Air Barrier: Elastomeric, modified bituminous or synthetic polymer membrane, meeting the following:

1. Air Permeance, ASTM E 2178: 0.02 L/s x sq. m of surface area at 75-Pa (0.004 cfm/sq. ft of surface area at 1.57-lbf/sq. ft.)pressure difference.

2. Vapor Permeance, ASTM E 96/E96M: Maximum 5.8 ng/Pa x s x sq. m (0.1 perm).

3. Elongation, Ultimate, ASTM D 412, Die C: 500 percent, minimum.

4. Combustion Characteristics: Flame spread, not greater than 25; smoke developed, not greater than 450, ASTM E 84.

5. Thickness of Membrane Air Barrier: Not less than 1.0 mm (40 mils)dry film thickness, applied in single continuous coat.

2.3 ACCESSORY MATERIALS:

A. Primer: Liquid waterborne primer meeting VOC requirements, recommended for substrate by membrane air barrier manufacturer.

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B. Counterflashing Sheet: Modified bituminous, minimum 1.0-mm- (40-mil- thick self-adhering composite sheet consisting of minimum 0.8 mm (32 mils) of rubberized asphalt laminated to polyethylene film.

C. Substrate Patching Material: Manufacturer's standard trowel-grade filler material.

D. Sprayed Polyurethane Foam Sealant: Foamed-in-place, 24- to 32-kg.cu. m (1.5- to 2.0-lb/cu. ft) density, with flame-spread index of 25 or less per ASTM E 162.

E. Flexible Opening Transition: Cured low-modulus silicone extrusion with reinforcing ribs, sized to fit opening widths, designed for adhesion to or insertion into aluminum framing extrusions, and compatible with air barrier system materials and accessories.

F. Joint Sealant: ASTM C 920, single-component, neutral-curing silicone; Class 100/50 (low modulus), Grade NS, Use NT related to exposure, approved by membrane air barrier manufacturer for adhesion and compatibility with membrane air barrier and accessories.

PART 3 - EXECUTION

3.1 EXAMINATION:

A. Surface Condition: Before applying membrane air barrier materials, ensure substrates are fully cured, smooth, clean, dry, and free from high spots, depressions, loose and foreign particles and other deterrents to adhesion.

B. Verify concrete surfaces have cured for time period recommended by membrane air barrier manufacturer, free from release agents, concrete curing agents, and other contaminates.

3.2 INTERFACE WITH OTHER WORK

A. Commencement of Work: Commence work once membrane air barrier substrates are adequately protected from weather and will remain protected during remainder of construction.

B. Sequencing of Work: Coordinate sequencing of work with work of other sections that form portions of building envelope air barrier to ensure that flashings and transition materials can be properly installed.

C. Subsequent Work: Coordinate work with work of other sections installed subsequent to membrane air barrier to ensure complete inspection of installed membrane air barrier and sealing of membrane air barrier penetrations necessitated by subsequent work.

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3.3 AIR BARRIER INSTALLATION

A. General: Prepare substrates and install and apply air barrier components in accordance with air barrier manufacturer's written instructions consistent with manufacturer's qualifying tested assemblies.

1. Compliance: Prepare substrates and install and apply air barrier components in accordance with requirements of ABAA QAP.

3.4 PREPARATION

A. Prepare and treat substrate in accordance with membrane air barrier manufacturer's written instructions.

B. Mask adjacent finished surfaces.

C. Remove contaminants and film-forming coatings from concrete.

D. Remove projections and excess materials and fill voids with substrate patching material.

E. Prepare and treat joints and cracks in substrate per ASTM C 1193 and membrane air barrier manufacturer's written instructions.

F. Apply primer to substrates.

3.5 APPLICATION OF TRANSITION STRIPS

A. Install transition strips and accessory materials according to membrane air barrier manufacturer's written instructions.

B. Connect and seal membrane air barrier material to adjacent components of building air barrier system, including, but not limited to, roofing system air barrier, exterior glazing and window systems, curtain wall systems, door framing, and other openings.

C. Flexible Opening Transition: Prime concealed perimeter frame surfaces of windows, storefronts, curtain walls, louvers, and doors. Apply flexible opening transition and attach or adhere in accordance with air barrier manufacturer's written instructions.

1. Fill gaps at perimeter of openings with foam sealant.

D. Penetrations: Fill gaps at perimeter of penetrations with foam sealant. Seal transition strips around penetrating objects with termination mastic.

E. Flashings: Seal top of through-wall flashings to membrane air barrier with continuous transitions strip of type recommended by membrane air barrier manufacturer for type of flashing.

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3.6 FLUID AIR-BARRIER MEMBRANE INSTALLATION

A. Apply fluid membrane air barrier material in full contact with substrate to produce a continuous seal with transition strips according to membrane air barrier manufacturers written instructions.

1. Apply fluid membrane in thickness recommended by manufacturer, but not less than thickness specified in this section.

B. Leave membrane air barrier exposed until tested and inspected by Owner's testing agency and approved by Resident Engineer.

C. Correct deficient applications not passing tests and inspections, make necessary repairs, and retest as required to demonstrate compliance with requirements.

3.7 TESTING:

A. Testing Agency: Contractor shall engage a qualified testing agency to perform tests and inspections, including documenting of membrane air barrier prior to concealment.

1. Inspections: Air-barrier materials, accessories, and installation are subject to inspection for compliance with requirements, including the following:

2. Continuity of air-barrier system has been achieved throughout the building envelope with no gaps or holes.

3. Continuous structural support of air-barrier system has been provided.

4. Concrete surfaces are smooth, clean, and free of cavities, protrusions, and mortar droppings.

5. Site conditions for application temperature and dryness of substrates have been maintained.

6. Maximum exposure time of materials to UV deterioration has not been exceeded.

7. Surfaces have been primed, if applicable.

8. Laps in strips and transition strips have complied with minimum requirements and have been shingled in the correct direction (or mastic has been applied on exposed edges), with no fishmouths.

9. Termination mastic has been applied on cut edges.

10. Strips and transition strips have been firmly adhered to substrate.

11. Compatible materials have been used.

12. Transitions at changes in direction and structural support at gaps have been provided.

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13. Connections between assemblies (air-barrier and sealants) have complied with requirements for cleanliness, surface preparation and priming, structural support, integrity, and continuity of seal.

14. All penetrations have been sealed.

15. Inspections and testing shall be carried out at the following rate:

a. Up to 10,000 square feet (930 square meters) – one inspection

b. 10,001 – 35,000 square feet (931 – 3,250 square meters) – two inspections

c. 35,001 – 75,000 square feet (3,251 – 6,970 square meters) – three inspections

d. 75,001 - 125,000 square feet (6,971 – 11,610 square meters) – four inspections

e. 125,001 – 200,000 square feet (11,611 – 18,580 square meters) – five inspections

f. Over 200,00 square feet (18,580 square meters) – six inspections.

16. Forward written inspection reports to the Resident Engineer within 5 working days of the inspection and test being performed.

17. If the inspections reveal any defects, promptly remove and replace defective work at no additional cost to the Owner.

B. Inspections shall include:

1. Compatibility of materials within membrane air barrier system and with adjacent materials.

2. Suitability of substrate and support for membrane air barrier materials.

3. Suitability of conditions under which membrane air barrier will be applied.

4. Adequacy of substrate priming.

5. Proper application and joint and edge treatment of transition strips, flexible opening transitions, and accessory materials.

6. Continuity and gap-free installation of membrane air barrier, transition strips, and accessory materials.

C. Testing shall include:

1. Qualitative air-leakage testing per ASTM E 1186.

D. Audit: Provide installer audit by ABAA. Coordinate scheduling of work and associated audit inspections. Cooperate with ABAA’s testing agency. Allow access to work areas and staging.

Notify ABAA in writing of schedule for Work of this Section to allow sufficient time for testing and inspection. Do not cover Work of this Section until testing and inspection is accepted.

Arrange and pay for site inspections by ABAA to verify conformance with the manufacturer’s

07 27 27 - 10 instructions, the site Quality Assurance Program used by ABAA, and this section of the project specification.

3.7 CLEANING AND PROTECTION

A. Clean spills, stains, and overspray resulting application utilizing cleaning agents recommended by manufacturers of affected construction. Remove masking materials.

B. Protect membrane air barrier from damage from subsequent work. Protect membrane materials from exposure to UV light in excess of that acceptable to membrane air barrier manufacturer; replace overexposed materials and retest.

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1.2 RELATED WORK