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FLUID-APPLIED MEMBRANE AIR BARRIERS
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SECTION 07 2726
FLUID-APPLIED MEMBRANE AIR BARRIERS
(Part of Filed Sub-Bid Section 07 0001 - Waterproofing, Dampproofing, And Caulking)
PART 1 - GENERAL
1.1 RELATED DOCUMENTS
A. Drawings and general provisions of the Contract, including General and Supplementary
Conditions and Division 01 Specification Sections, apply to this Section.
1.2 SUMMARY
A. Work Included: Provide labor, materials and equipment necessary to complete the work of this
Section, including but not limited to the following:
1. Vapor-retarding, fluid-applied air barriers applied over CMU.
2. Accessories, including but not limted to primers, preformed silicone extrusions, transition
strips, and penetration and termination sealants.
3. Other items indicated on Drawings as Work of this Section.
B. Related Requirements:
1. Section 01 3113.23 “Air Barrier System Coordination” for administrative and procedural
requirements for coordination between the trades, and for the proper scheduling and
sequencing of the work to produce an airtight building enclosure.
2. Section 01 8113.14 “Sustainable Design Requirements” for general requirements and
procedures for compliance with certain USGBC LEED prerequisites and credits.
3. Section 01 9113 “General Commissioning Requirements."
4. Section 01 9119 “Facility Shell Commissioning" for commissioning process requirements
for the building envelope.
5. Section 04 2000 “Unit Masonry" for CMU substrate for fluid-applied membrane air
barriers.
6. Section 06 7100 “Composite Framing Support (CFS) Systems” for composite framing
support (CFS) system with in-fill insulation installed over air barrier.
7. Section 07 2715 "Non-Bituminous Self-Adhering Sheet Air Barriers" for self-adhering,
non-bituminous sheet air barriers over sheathing.
1.3 DEFINITIONS
A. Air-Barrier Material: A primary element that provides a continuous barrier to the movement of
air.
B. Air-Barrier Accessory: A transitional component of the air barrier that provides continuity.
C. Air-Barrier Assembly: The collection of air-barrier materials and accessories applied to an
opaque wall, including joints and junctions to abutting construction, to control air movement
through the wall.
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1.4 PREINSTALLATION MEETINGS
A. Preinstallation Conference: Conduct conference at Project site after Shop Drawing review but
before construction of mockups.
1. Review air-barrier requirements and installation, special details, mockups, air-leakage
and bond testing, air-barrier protection, and work scheduling that covers air barriers.
1.5 ACTION SUBMITTALS
A. Make Submittals in accordance with Section 01 3300 “Submittal Procedures.”
B. Product Data: For each type of product.
1. Include manufacturer's written instructions for evaluating, preparing, and treating each
substrate; technical data; dry film thickness; and tested physical and performance
properties of products.
C. Sustainable Design Submittals:
1. Adhesives And Sealants: Provide manufacturers' or third-party certification of testing to
and compliance with the California Department of Public Health (CDPH) Standard
method v1.2-2017, that includes the following information:
a. The exposure scenario used to determine compliance.
b. The range of total VOCs after 14 days, measured as specified in the CDPH
Standard Method v1.2:
1) 0.5 mg/m^3 or less;
2) Between 0.5 and 5.0 mg/m^3; or
3) 5.0 mg/m^3 or more.
c. Laboratory accreditation under ISO/IEC 17025.
d. Claims of compliance for wet-applied products must state the amount applied in
mass per surface area.
e. Provide MSDS or other manufacturer documentation with disclosure of VOC
content for all wet-applied products.
f. Complete "LEED Materials Documentation Sheet" with IEQc2 information for
adhesives/sealants installed within the waterproofing membrane.
2. Paints And Coatings: Provide manufacturers' or third-party certification of testing to and
compliance with the California Department of Public Health (CDPH) Standard method
v1.2-2017 that includes the following information:
a. The exposure scenario used to determine compliance.
b. The range of total VOCs after 14 days, measured as specified in the CDPH
Standard Method v1.2:
1) 0.5 mg/m^3 or less;
2) Between 0.5 and 5.0 mg/m^3; or
3) 5.0 mg/m^3 or more.
c. Laboratory accreditation under ISO/IEC 17025.
d. Claims of compliance for wet-applied products must state the amount applied in
mass per surface area.
e. Provide MSDS or other manufacturer documentation with disclosure of VOC
content for all wet-applied products.
f. Complete "LEED Materials Documentation Sheet" with IEQc2 information for
paints/coatings installed within the waterproofing membrane.
D. Shop Drawings: For air-barrier assemblies.
1. Show locations and extent of air-barrier materials, accessories, and assemblies specific
to Project conditions.
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2. Include details for substrate joints and cracks, counterflashing strips, penetrations, inside
and outside corners, terminations, and tie-ins with adjoining construction.
3. Include details of interfaces with other materials that form part of air barrier.
1.6 INFORMATIONAL SUBMITTALS
A. Qualification Data: For Installer.
B. Product Certificates: From air-barrier manufacturer, certifying compatibility of air barriers and
accessory materials with Project materials that connect to or that come in contact with the
barrier.
C. Product Test Reports: For each air-barrier assembly, for tests performed by a qualified testing
agency.
1. From testing agency, certifying air barriers and accessory materials are approved for use
in NFPA 285 assemblies.
D. Field Quality-Control Reports: Submit field observation reports signed by manufacturer’s
technical representative.
1.7 QUALITY ASSURANCE
A. Installer Qualifications: An entity that employs installers and supervisors who are trained and
approved by manufacturer.
B. Mockups: Build mockups to set quality standards for materials and execution and for
preconstruction testing.
1. Provide fluid-applied air barriers and accessories as part of the Exterior Wall Mockups
specified in Section 01 4339 “Mockups” to demonstrate surface preparation, crack and
joint treatment, application of air barriers, and sealing of gaps, terminations, and
penetrations of air-barrier assembly.
a. Coordinate construction of mockups to permit inspection and testing of air barrier
before external insulation and cladding are installed.
b. Include junction with roofing membrane, building corner condition, and foundation
wall intersection.
c. If Architect determines mockups do not comply with requirements, reconstruct
mockups and apply air barrier until mockups are approved.
2. Approval of mockups does not constitute approval of deviations from the Contract
Documents contained in mockups unless Architect specifically approves such deviations
in writing.
1.8 PRECONSTRUCTION TESTING
A. Preconstruction Testing Service: Owner will engage a qualified testing agency to perform
preconstruction testing on field mockups.
B. Mockup Testing: Air-barrier assemblies shall comply with performance requirements indicated,
as evidenced by reports based on mockup testing by a qualified testing agency.
1. Air-Leakage-Location Testing: Mockups will be tested for evidence of air leakage
according to ASTM E 1186, chamber pressurization or depressurization with smoke
tracers or ASTM E 1186, chamber depressurization with detection liquids.
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FLUID-APPLIED MEMBRANE AIR BARRIERS
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2. Air-Leakage-Volume Testing: Mockups will be tested for air-leakage rate according to
ASTM E 783.
3. Adhesion Testing: Mockups will be tested for required air-barrier adhesion to substrate
according to ASTM D 4541.
4. Notify Architect seven days in advance of the dates and times when mockups will be
tested.
1.9 DELIVERY, STORAGE, AND HANDLING
A. Remove and replace liquid materials that cannot be applied within their stated shelf life.
B. Protect stored materials from direct sunlight.
1.10 FIELD CONDITIONS
A. Environmental Limitations: Apply air barrier within the range of ambient and substrate
temperatures recommended in writing by air-barrier manufacturer.
1. Protect substrates from environmental conditions that affect air-barrier performance.
2. Do not apply air barrier to a damp or wet substrate or during snow, rain, fog, or mist.
3. If ambient and substrate temperatures are below the range recommended in writing by
air-barrier manufacturer for manufacturer’s standard air barrier products, provide
manufacturer’s low temperature air barrier products. Apply low temperature air barriers
within the range of ambient and substrate temperatures recommended in writing by air-
barrier manufacturer.
PART 2 - PRODUCTS
2.1 LEED REQUIREMENTS
A. Adhesives And Sealants: For field applications that are inside the weatherproofing membrane:
Adhesives/sealants must be tested and determined compliant in accordance with California
Department of Public Health (CDPH) Standard Method v1.2-2017, using the applicable
exposure scenario. The default scenario is the private office scenario.
1. All adhesives/sealants wet-applied on site must meet the applicable chemical content
requirements of SCAQMD Rule 1168, October 6, 2017, Adhesive and Sealant
Applications, as analyzed by the methods specified in Rule 1168. The provisions of
SCAQMD Rule 1168 do not apply to adhesives and sealants subject to state or federal
consumer product VOC regulations.
B. Paints And Coatings: For field applications that are inside the weatherproofing membrane:
Paints and Coatings must be tested and determined compliant in accordance with California
Department of Public Health (CDPH) Standard Method v1.2-2017, using the applicable
exposure scenario. The default scenario if the private office scenario.
1. All paints and coatings wet-applied on site must meet the applicable VOC limits of the
California Air Resources Board (CARB) 2007, Suggested Control Measure (SCM) for
Architectural Coatings, or the South Coast Air Quality Management District (SCAQMD)
Rule 1113, effective February 5, 2016.
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FLUID-APPLIED MEMBRANE AIR BARRIERS
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2.2 PERFORMANCE REQUIREMENTS
A. Air-Barrier Performance: Air-barrier assembly and seals with adjacent construction shall be
capable of performing as a continuous air barrier and as a liquid-water drainage plane flashed
to discharge to the exterior incidental condensation or water penetration. Air-barrier assemblies
shall be capable of accommodating substrate movement and of sealing substrate expansion
and control joints, construction material changes, penetrations, tie-ins to installed waterproofing,
and transitions at perimeter conditions without deterioration and air leakage exceeding specified
limits.
B. Air-Barrier Assembly Air Leakage: Maximum 0.04 cfm/sq. ft. of surface area at 1.57 lbf/sq. ft.,
when tested according to ASTM E 2357.
2.3 HIGH-BUILD AIR BARRIERS, VAPOR RETARDING
A. High-Build, Vapor-Retarding Air Barrier: Synthetic polymer membrane with an installed dry film
thickness, according to manufacturer's written instructions, of 35 mils or thicker over smooth,
void-free substrates.
1. Products: Subject to compliance with requirements, products that may be incorporated
into the Work include, but are not limited to the following or equal:
a. Carlisle Coatings & Waterproofing Inc.; Fire Resist Barritech NP.
b. Henry Company; Air-Bloc 16MR or Air-Bloc 32MR.
c. Tremco Incorporated, an RPM company; ExoAir 130.
2. Physical and Performance Properties:
a. Air Permeance: Maximum 0.004 cfm/sq. ft. of surface area at 1.57-lbf/sq. ft.
pressure difference; ASTM E 2178.
b. Vapor Permeance: Maximum 0.1 perm; ASTM E 96/E 96M, Desiccant Method.
c. Ultimate Elongation: Minimum 500 percent; ASTM D 412, Die C.
d. Adhesion to Substrate: Minimum 16 lbf/sq. in. when tested according to
ASTM D 4541.
e. Fire Propagation Characteristics: Passes NFPA 285 testing as part of an
approved assembly.
2.4 ACCESSORY MATERIALS
A. Requirement: Provide primers, transition strips, termination strips, joint reinforcing fabric and
strips, joint sealants, counterflashing strips, flashing sheets and metal termination bars,
termination mastic, substrate patching materials, adhesives, tapes, foam sealants, lap sealants,
and other accessory materials that are recommended in writing by air-barrier manufacturer to
produce a complete air-barrier assembly and that are compatible with primary air-barrier
material and adjacent construction to which they may seal.
B. Primer: Liquid waterborne primer recommended for substrate by air-barrier material
manufacturer.
C. Stainless-Steel Sheet: ASTM A 240/A 240M, Type 304, 0.0250 inch thick, and Series 300
stainless-steel fasteners.
D. Sprayed Polyurethane Foam Sealant: One- or two-component, foamed-in-place,
low-expansion, low-pressure polyurethane foam sealant, 1.5- to 2.0-lb/cu. ft density; flame-
spread index of 25 or less according to ASTM E 162; with primer and noncorrosive substrate
cleaner recommended by foam sealant manufacturer.
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FLUID-APPLIED MEMBRANE AIR BARRIERS
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E. Preformed Silicone Extrusion: Manufacturer's standard system consisting of cured low-modulus
silicone extrusion, sized to fit opening widths, with a single-component, neutral-curing,
Class 100/50 (low-modulus) silicone sealant for bonding extrusions to substrates.
1. Manufacturers: Subject to compliance with requirements, provide products by one of the
following or equal:
a. Dow Corning Corporation.
b. GE Construction Sealants; Momentive Performance Materials Inc.
c. Pecora Corporation.
d. Tremco Incorporated.
F. Joint Sealant: ASTM C 920, single-component, neutral-curing silicone; Class 100/50 (low
modulus), Grade NS, Use NT related to exposure, and, as applicable to joint substrates
indicated, Use O. Comply with Section 07 9200 "Joint Sealants."
G. Termination Mastic: Air-barrier manufacturer's standard cold fluid-applied elastomeric liquid;
trowel grade.
PART 3 - EXECUTION
3.1 EXAMINATION
A. Examine substrates, areas, and conditions, with Installer present, for compliance with
requirements and other conditions affecting performance of the Work.
1. Verify that substrates are sound and free of oil, grease, dirt, excess mortar, or other
contaminants.
2. Verify that substrates have cured and aged for minimum time recommended in writing by
air-barrier manufacturer.
3. Verify that substrates are visibly dry and free of moisture. Test concrete substrates for
capillary moisture by plastic sheet method according to ASTM D 4263.
4. Verify that masonry joints are flush and completely filled with mortar.
B. Proceed with installation only after unsatisfactory conditions have been corrected.
3.2 SURFACE PREPARATION
A. Clean, prepare, treat, fill, and seal substrate and joints and cracks in substrate according to
manufacturer's written instructions and details. Provide clean, dust-free, and dry substrate for
air-barrier application.
B. Mask off adjoining surfaces not covered by air barrier to prevent spillage and overspray
affecting other construction.
C. Remove grease, oil, bitumen, form-release agents, paints, curing compounds, and other
penetrating contaminants or film-forming coatings from concrete.
D. Remove fins, ridges, mortar, and other projections and fill honeycomb, aggregate pockets,
holes, and other voids in concrete with substrate-patching material.
E. Remove excess mortar from masonry ties, shelf angles, and other obstructions.
F. At changes in substrate plane, apply sealant or termination mastic beads at sharp corners and
edges to form a smooth transition from one plane to another.
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FLUID-APPLIED MEMBRANE AIR BARRIERS
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G. Cover gaps in substrate plane and form a smooth transition from one substrate plane to another
with stainless-steel sheet mechanically fastened to structural framing to provide continuous
support for air barrier.
H. Bridge isolation joints, expansion joints, and discontinuous wall-to-wall, deck-to-wall, and deck-
to-deck joints with air-barrier accessory material that accommodates joint movement according
to manufacturer's written instructions and details.
3.3 ACCESSORIES INSTALLATION
A. Install accessory materials according to air-barrier manufacturer's written instructions and
details to form a seal with adjacent construction and ensure continuity of air and water barrier.
1. Coordinate the installation of air barrier with installation of roofing membrane and base
flashing to ensure continuity of air barrier with roofing membrane.
2. Install transition strip on roofing membrane or base flashing so that a minimum of 3
inches of coverage is achieved over each substrate.
3. Unless manufacturer recommends in writing against priming, apply primer to substrates
at required rate and allow it to dry.
4. Apply primer to substrates at required rate and allow it to dry. Limit priming to areas that
will be covered by air-barrier material on same day. Reprime areas exposed for more
than 24 hours.
B. Connect and seal exterior wall air-barrier material continuously to roofing-membrane air barrier,
concrete below-grade structures, floor-to-floor construction, exterior glazing and window
systems, glazed curtain-wall systems, storefront systems, exterior louvers, exterior door
framing, and other construction used in exterior wall openings, using accessory materials.
C. At end of each working day, seal top edge of strips and transition strips to substrate with
termination mastic.
D. Apply joint sealants forming part of air-barrier assembly within manufacturer's recommended
application temperature ranges. Consult manufacturer when sealant cannot be applied within
these temperature ranges.
E. Wall Openings: Prime concealed, perimeter frame surfaces of windows, curtain walls,
storefronts, and doors. Apply preformed silicone extrusion so that a minimum of 3 inches of
coverage is achieved over each substrate. Maintain 3 inches of full contact over firm bearing to
perimeter frames, with not less than 1 inch of full contact.
1. Preformed Silicone Extrusion: Set in full bed of silicone sealant applied to walls, frame,
and air-barrier material.
F. Fill gaps in perimeter frame surfaces of windows, curtain walls, storefronts, and doors, and
miscellaneous penetrations of air-barrier material with foam sealant.
G. Seal top of through-wall flashings to air barrier with an additional 6-inch- wide, transition strip.
H. Seal exposed edges of strips at seams, cuts, penetrations, and terminations not concealed by
metal counterflashings or ending in reglets with termination mastic.
I. Repair punctures, voids, and deficient lapped seams in strips and transition strips. Slit and
flatten fishmouths and blisters. Patch with transition strips extending 6 inches beyond repaired
areas in strip direction.
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3.4 PRIMARY AIR-BARRIER MATERIAL INSTALLATION
A. Start installation of fluid-applied membrane air barrier in presence of manufacturer's technical
representative.
B. Apply air-barrier material to form a seal with strips and transition strips and to achieve a
continuous air barrier according to air-barrier manufacturer's written instructions and details.
Apply air-barrier material within manufacturer's recommended application temperature ranges.
1. Unless manufacturer recommends in writing against priming, apply primer to substrates
at required rate and allow it to dry.
2. Limit priming to areas that will be covered by air-barrier material on same day. Reprime
areas exposed for more than 24 hours.
3. Where multiple prime coats are needed to achieve required bond, allow adequate drying
time between coats.
C. High-Build Air Barriers: Apply continuous unbroken air-barrier material to substrates according
to the following thickness. Apply air-barrier material in full contact around protrusions such as
masonry ties.
1. Vapor-Retarding, High-Build Air Barrier: Total dry film thickness as recommended in
writing by manufacturer to comply with performance requirements, but not less than 35
mils, applied in one or more equal coats.
D. Do not cover air barrier until it has been tested and inspected by testing agency.
E. Correct deficiencies in or remove air barrier that does not comply with requirements; repair
substrates and reapply air-barrier components.
3.5 FIELD QUALITY CONTROL
A. Manufacturer's Field Service: Engage a full-time site representative qualified by the
fluid-applied, air barrier manufacturer to inspect substrate conditions, surface preparation,
membrane application, flashings, protection, and other components and to furnish daily reports
to Architect.
B. Testing Agency: Owner will engage a qualified testing agency to perform tests and inspections.
C. Inspections: Air-barrier materials, accessories, and installation are subject to inspection for
compliance with requirements.
D. Tests: As determined by testing agency from among the following tests:
1. Air-Leakage-Location Testing: Air-barrier assemblies will be tested for evidence of air
leakage according to ASTM E 1186, chamber pressurization or depressurization with
smoke tracers or ASTM E 1186, chamber depressurization using detection liquids.
2. Air-Leakage-Volume Testing: Air-barrier assemblies will be tested for air-leakage rate
according to ASTM E 783.
3. Adhesion Testing: Air-barrier assemblies will be tested for required adhesion to substrate
according to ASTM D 4541 for each 600 sq. ft. of installed air barrier or part thereof.
E. Air barriers will be considered defective if they do not pass tests and inspections.
1. Apply additional air-barrier material, according to manufacturer's written instructions,
where inspection results indicate insufficient thickness.
2. Remove and replace deficient air-barrier components for retesting as specified above.
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FLUID-APPLIED MEMBRANE AIR BARRIERS
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F. Repair damage to air barriers caused by testing; follow manufacturer's written instructions.
G. Prepare test and inspection reports.
3.6 COMMISSIONING
A. Facility Shell Commissioning: The building enclosure will be inspected and tested by Owner’s
testing agency and witnessed by the Owner’s Commissioning Agent during construction.
Comply with commissioning process requirements.
1. Commissioning Agent: During construction the Owner’s commissioning agent will
perform site visits to observe that the construction is in general conformance with the
Contract Documents. Observations by the Commissioning Agent will be on a “spot
check” basis.
2. Commissioning requirements shall not reduce nor diminish the responsibility of
Contractor, subcontractors, and material suppliers in performing the Work as required by
Contract Documents. Requirements specified in commissioning requirements are in
addition to requirements specified in related specification Sections.
3. Repair or replace materials, products, and components damaged by testing at no
additional cost to Owner. Replace materials, products, and components that fail
inspections and tests at no additional cost to Owner.
3.7 CLEANING AND PROTECTION
A. Protect air-barrier system from damage during application and remainder of construction period,
according to manufacturer's written instructions.
1. Protect air barrier from exposure to UV light and harmful weather exposure as
recommended in writing by manufacturer. If exposed to these conditions for longer than
recommended, remove and replace air barrier or install additional, full-thickness, air-
barrier application after repairing and preparing the overexposed materials according to
air-barrier manufacturer's written instructions.
2. Protect air barrier from contact with incompatible materials and sealants not approved by
air-barrier manufacturer.
B. Clean spills, stains, and soiling from construction that would be exposed in the completed work
using cleaning agents and procedures recommended in writing by manufacturer of affected
construction.
C. Remove masking materials after installation.
END OF SECTION
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