AD15EE_1_0002.PDF

ISSUED FOR ADDENDUM A - 6/10/2022

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FLUID-APPLIED MEMBRANE AIR BARRIERS

SECTION 07 27 26 - FLUID-APPLIED MEMBRANE AIR BARRIERS (DAMPPROOFING)

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. Section includes fluid-applied, vapor-permeable membrane air barriers referred to as

“DAMPPROOFING” on drawings.

B. Related Requirements:

1. Section 042000 "Unit Masonry".

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 accessory materials applied to an opaque wall, including joints and junctions to abutting construction, to control air movement through the wall.

1.4 PREINSTALLATION MEETINGS

A. Preinstallation Conference: Conduct conference at Project site.

1. Include installers of other construction connecting to air barrier, including roofing, masonry, AND sealants.

2. Review air barrier requirements including surface preparation, substrate condition and pretreatment, minimum substrate curing period, forecasted weather conditions, special details and sheet flashings, mockups, installation procedures, sequence of installation, testing and inspecting procedures, materials approved for use, compatibility of materials, coordination with installation of adjacent and covering materials, and protection and repairs.

1.5 ACTION SUBMITTALS

A. Product Data: For each type of product. Include manufacturer's written instructions for evaluating, preparing, and treating substrate; technical data; and tested physical and performance properties of air barrier.

1. Include manufacturer's written instructions for evaluating, preparing, and treating substrate; technical data; and tested physical and performance properties of products.

2. Submit letter from primary materials manufacturer indicating approval of products not manufactured by primary manufacturer.

3. Include statement that materials are compatible with adjacent materials proposed for use.

4. Submit reports indicating that field peel-adhesion test on all materials to which sealants are adhered have been performed and the changes made, if required, to other approved materials, in order to achieve successful adhesion.

B. Shop Drawings: For air-barrier assemblies.

1. Show locations and extent of air barrier. Include project specific details for substrate joints and cracks, counterflashing strips, penetrations, inside and outside corners, terminations, and tie-ins with adjoining construction.

2. Include project specific details of interfaces with other materials that form part of air barrier.

3. Include letter from manufacturer indicating that the project specific details and shop

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drawings have been reviewed and are approved for use.

C. Samples: Submit clearly labeled samples, 3 by 4 inch (75 mm by 100 mm) minimum size of each material specified.

D. Field Test Results: Submit mockup and in-situ test results of air leakage test and water leakage test with specified standards, including retesting if initial results are not satisfactory.

1.6 INFORMATIONAL SUBMITTALS

A. Qualification Data: For Installer. Include list of manufacturer-certified installers and supervisors employed by the Installer, who work on Project.

1. Provide evidence from the manufacturer that the firm is approved, authorized, or licensed to install the specified products and is eligible to receive manufacturer's special warranty.

2. Provide evidence that the installing firm is experienced in applying air barrier materials similar in material, design, and extent to those indicated for this Project, whose work has resulted in applications with a record of successful in-service performance.

3. Provide a manual that describes Installers and Manufacturers Quality Assurance / Quality Control program and procedures.

4. Sample of Installers Daily Work Sheet.

B. Product Certificates: From air-barrier manufacturer, certifying permanent chemical and adhesive compatibility of air barriers and accessory materials with Project materials that connect to or that come in contact with the barrier, and certifying that cleaning materials used during installation are chemically compatible with each of the adjacent materials proposed for use.

C. Product Test Reports: For each air-barrier assembly, for tests performed by a qualified testing agency.

D. Sample Warranty: Manufacturer and Installer sample warranty.

1.7 QUALITY ASSURANCE

A. Installer Qualifications:

1. A qualified firm that is approved, authorized, or licensed by the manufacturer to install manufacturer's product, that is eligible to receive manufacturer's special warranty, and is experienced in applying air barrier materials similar in material, design, and extent to those indicated for this Project, whose work has resulted in applications with a record of successful in-service performance.

B. Manufacturer Qualifications: A qualified manufacturer regularly engaged in manufacturing air barrier membranes.

C. Quality Assurance / Quality Control Program:

1. Daily Inspection:

a. Visual inspection of the substrate prior to the application of membrane to confirm the substrate is in accordance with the manufacturer’s instructions.

b. Visual inspection on the completed air barrier for that day and fix any deficiencies.

c. Verification of manufactures specific Wet film thickness of installed work.

d. Adhesion Test as indicated in Field Quality Control.

2. Daily Work Sheet: At a minimum include the following:

a. Listing of installers

b. Project name

c. Type of air barrier installed

d. Air barrier product name and lot/batch number

e. Primer product name and lot/batch number

f. Substrate type

g. Substrate preparation required

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h. Installation locations (gridlines, elevations, etc)

i. Results of visual inspection

j. Results of verification of wet film thickness, include photo documentation

k. Results of verification of adhesion testing, include photo documentation

3. Testing, Inspection, and Reporting as indicated in the Field Quality control.

D. Mockups: Before beginning installation of air barrier, build mockups to set quality standards for materials and execution and for preconstruction testing.

1. Build mockups of exterior wall assembly 150 sq. ft. (14 sq. m)], incorporating backup wall construction, ties and other penetrations, and flashing 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 by Owner's testing agency of air barrier before external insulation and cladding are installed.

b. 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.

3. Subject to compliance with requirements, approved mockups may become part of the completed Work if undisturbed at time of Substantial Completion.

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. Adhesion Testing: Mockups will be tested for minimum air-barrier adhesion of 16 lbf/sq. in. (207 kPa) or to manufacturer's minimum adhesion level per substrates, whichever is greater, according to ASTM D 4541.

a. Test Locations: Perform 3 tests per substrate type.

2. Notify Architect 14 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 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.

1.11 WARRANTY

A. Manufacturer's Warranty: Provide manufacturer’s standard product warranty, for a minimum

10 years from date of Substantial Completion.

B. Special Installer's Warranty: Provide air barrier installer's 2 year warranty from date of

Substantial Completion, including all components of the air barrier assembly, against failures including loss of air tight seal, loss of watertight seal, loss of adhesion, loss of cohesion, failure to cure properly.

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PART 2 - PRODUCTS

2.1 MATERIALS, GENERAL

A. Source Limitations: Obtain primary ABAA evaluated materials and air-barrier accessories from single source ABAA evaluated manufacturer. Additional accessory products are acceptable for use provided they are approved by the primary air barrier manufacturer.

B. Fire Propagation Characteristics: Passes NFPA 285 testing as part of an approved assembly.

2.2 PERFORMANCE REQUIREMENTS

A. General: Air barrier shall be capable of performing as a continuous vapor-permeable air barrier and as a liquid-water drainage plane flashed to discharge to the exterior incidental condensation or water penetration. Air-barrier shall assemblies be capable of accommodating substrate 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.

(0.2 L/s x sq. m of surface area at 75 Pa), when tested according to ASTM E 2357.

C. Provide an air barrier assembly that withstands combined positive and negative design wind, fan and stack pressures on the envelope without damage or displacement, that transfers the load to the structure, and that does not displace adjacent materials under full load. Join air barrier system materials in an airtight and flexible manner to adjacent assemblies, allowing for the relative movement of assemblies due to thermal and moisture variations and creep, and anticipated seismic movement.

2.3 VAPOR-PERMEABLE MEMBRANE AIR-BARRIER

A. Fluid-Applied, Vapor-Permeable Membrane Air Barrier:

1. Products: Subject to compliance with requirements, provide one of the following:

a. Dow Corning Corp.; Defend Air 200.

b. Momentive Performance Materials; Elemax 2600 AWB.

c. PROSOCO; Cat 5

d. GCP Applied Technologies Inc.; Perm-A-Barrier VPL.

2. Physical and Performance Properties:

a. Air Permeance: Maximum 0.004 cfm/sq. ft. of surface area at 1.57-lbf/sq. ft.

(0.02 L/s x sq. m of surface area at 75-Pa) pressure difference; ASTM E 2178.

b. Vapor Permeance: Minimum 10 perms (580 ng/Pa x s x sq. m); ASTM E 96/E

96M.

c. Ultimate Elongation: Minimum 200 percent; ASTM D 412, Die C.

2.4 ACCESSORY MATERIALS

A. General: Accessory materials recommended by air-barrier manufacturer to produce a complete air-barrier assembly and compatible with primary air-barrier material.

B. Transition Membrane: Between Air Barrier Membrane and Other Adjacent Materials: Comply with both air barrier manufacturer’s recommendations and adjacent material manufacturer’s recommendations.

1. Liquid Flashing: Manufacturer's standard trowel grade liquid flashing.

a. Joint Reinforcing Strip: Air-barrier manufacturer's glass-fiber-mesh tape.

2. Butyl Strip: 30 to 40 mils (0.76 to 1.0 mm) thick, self-adhering;

polyethylene-film-reinforced top surface laminated to layer of butyl adhesive with release liner backing.

3. High Temperature Modified Bituminous Strip: 40 mils (1.0 mm) thick, smooth surfaced, self-adhering; consisting of 36 mils (0.9 mm) of rubberized asphalt laminated to

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a 4-mil- (0.1-mm-) thick polyethylene film with release liner backing.

a. For use under metal copings and flashings directly exposed to the exterior.

4. Foil Faced Modified Bituminous Strip: 40 mils (1.0 mm) thick, smooth surfaced, self-adhering; consisting of 36 mils (0.9 mm) of rubberized asphalt laminated to a 4-mil- (0.1-mm-) thick polyethylene film with release liner backing.

5. Modified Bituminous Strip: 40 mils (1.0 mm) thick, smooth surfaced, self-adhering;

consisting of 36 mils (0.9 mm) of rubberized asphalt laminated to a 4-mil- (0.1-mm-) thick polyethylene film with release liner backing.

6. Adhesive-Coated Transition Strip: Vapor-permeable, 17-mil- (0.43-mm-) thick, self-adhering strip consisting of an adhesive coating over a permeable laminate with a permeance value of 37 perms (2145 ng/Pa x s x sq. m).

7. Elastomeric Flashing Sheet: ASTM D 2000, 2BC415 to 3BC620, minimum 50- to 65-mil- (1.3- to 1.6-mm-) thick, cured sheet neoprene with manufacturer-recommended contact adhesives and lap sealant with stainless-steel termination bars and fasteners.

8. Preformed Silicone-Sealant 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.

a. Dow Corning Corporation; Silicone Transition Strip System.

b. Momentive Performance Materials Inc.; US11000 UltraSpan.

c. Tremco Incorporated; Proglaze ETA Connections.

C. Primer: Liquid primer recommended for substrate by air-barrier material manufacturer.

D. Substrate-Patching Membrane: Manufacturer's standard trowel-grade substrate filler.

E. Adhesive and Tape: Air-barrier manufacturer's standard adhesive and pressure-sensitive adhesive tape.

F. Stainless-Steel Sheet: ASTM A 240/A 240M, Type 304, 0.0187 inch (0.5 mm) thick, and

Series 300 stainless-steel fasteners.

G. Sprayed Polyurethane Foam Sealant: One- or two-component, foamed-in-place, polyurethane foam sealant, 1.5- to 2.0-lb/cu. ft (24- to 32-kg/cu. m) density; flame-spread index of 25 or less according to ASTM E 162; with primer and noncorrosive substrate cleaner recommended by foam sealant manufacturer.

H. 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 079200 "Joint Sealants."

I. 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 concrete has cured and aged for minimum time period recommended by air-barrier manufacturer.

3. Verify that concrete is visibly dry and free of moisture. Test for capillary moisture by plastic sheet method according to ASTM D 4263.

4. Verify that the minimum concrete drying period recommended by air barrier system manufacturer has passed. Perform moisture content testing as required by the air barrier

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system manufacturer to verify concrete is acceptable for installation of air barrier.

5. Verify that masonry joints are flush and completely filled with mortar.

6. Verify sealants used in sheathing are compatible with membrane proposed for use.

Perform field peel-adhesion test on materials to which sealants are adhered.

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

3.2 SURFACE PREPARATION

A. Clean, prepare, treat, and seal substrate according to manufacturer's written instructions.

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 membrane.

1. Parge CMU and cast-in-place concrete surfaces as specified in Section 042000 "Unit

Masonry" or use other methods required by air barrier manufacturer to provide suitable substrate for air barrier application.

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.

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.

3.3 JOINT TREATMENT

A. Concrete and Masonry: Prepare, treat, rout, and fill joints and cracks in substrate according to

ASTM C 1193 and air-barrier manufacturer's written instructions. Remove dust and dirt from joints and cracks complying with ASTM D 4258 before coating surfaces.

1. Prime substrate and apply a single thickness of air-barrier manufacturer's recommended preparation coat extending a minimum of 3 inches (75 mm) along each side of joints and cracks. Apply a double thickness of fluid air-barrier material and embed a joint reinforcing strip in preparation coat.

3.4 TRANSITION MEMBRANE INSTALLATION

A. General: Install transition membrane and accessory materials according to air-barrier manufacturer's written instructions to form a seal with adjacent construction and maintain a continuous air barrier.

1. Coordinate the installation of air barrier with installation of roofing membrane, below grade waterproofing, and base flashing to ensure continuity of air barrier with roofing membrane.

2. Install manufacturer's recommended transition strip on roofing membrane or base flashing so that a minimum of 3 inches (75 mm) of coverage is achieved over each substrate.

B. Apply primer to substrates at required rate and allow it to dry. Limit priming to areas that will be covered by fluid air-barrier material on same day. Reprime areas exposed for more than 24 hours.

C. 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

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framing, and other construction used in exterior wall openings, using accessory materials as recommended by manufacturer.

D. At end of each working day, seal top edge of transition membrane to substrate with termination mastic.

E. 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.

F. Wall Openings: Prime concealed, perimeter frame surfaces of windows, curtain walls, storefronts, and doors. Apply transition membrane so that a minimum of 3 inches (75 mm) of coverage is achieved over each substrate. Maintain 3 inches (75 mm) of full contact over firm bearing to perimeter frames with not less than 1 inch (25 mm) of full contact.

1. Modified Bituminous Transition Strip: Roll firmly to enhance adhesion.

2. Adhesive-Coated Transition Strip: Roll firmly to enhance adhesion.

3. Elastomeric Flashing Sheet: Apply adhesive to wall, frame, and flashing sheet. Install flashing sheet and termination bars, fastened at 6 inches (150 mm) o.c. Apply lap sealant over exposed edges and on cavity side of flashing sheet.

4. Preformed Silicone-Sealant Extrusion: Set in full bed of silicone sealant applied to walls, frame, and air-barrier material.

G. Fill gaps in perimeter frame surfaces of windows, curtain walls, storefronts, and doors, and miscellaneous penetrations of air-barrier material with foam sealant.

H. Seal transition membrane around masonry reinforcing or ties and penetrations with termination mastic.

I. Seal exposed edges of transition membrane at seams, cuts, penetrations, and terminations not concealed by metal counterflashings or ending in reglets with termination mastic.

J. Repair punctures, voids, and deficient lapped seams in transition membrane. Slit and flatten fishmouths and blisters. Patch with transition strips extending 6 inches (150 mm) beyond repaired areas in strip direction.

3.5 FLUID AIR-BARRIER MEMBRANE INSTALLATION

A. General: Apply fluid air-barrier material to form a seal with transition membrane and to achieve a continuous air barrier according to air-barrier manufacturer's written instructions.

Apply fluid air-barrier material within manufacturer's recommended application temperature ranges.

1. Apply primer to substrates at required rate and allow it to dry.

2. Limit priming to areas that will be covered by fluid air-barrier material on same day.

Reprime areas exposed for more than 24 hours.

B. Membrane Air Barriers: Apply a continuous unbroken air-barrier membrane to substrates according to the following thickness. Apply air-barrier membrane in full contact around protrusions such as masonry ties.

1. Apply to a total wet film thickness as required by the membrane manufacturer to meet the performance requirements indicated.

C. Apply transition membrane according to air-barrier manufacturer's written instructions.

D. Provide air barrier and accessories that are acceptable for use at horizontal surfaces without detrimental effects to material.

E. Do not cover air barrier until it has been tested and inspected by Owner's testing agency.

F. Correct deficiencies in or remove air barrier that does not comply with requirements; repair substrates and reapply air-barrier components.

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3.6 FIELD QUALITY CONTROL

A. Testing Agency: Owner will engage a qualified testing agency to perform tests and inspections.

B. Periodic Inspections: Arrange for air barrier system manufacturer's technical personnel to inspect installation weekly during periods of ongoing installation.

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

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

2. Air-barrier dry film thickness.

3. Air-barrier wet film thickness.

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

5. Masonry and concrete surfaces are smooth, clean, and free of cavities, protrusions, and mortar droppings.

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

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

8. Surfaces have been primed, if applicable.

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

10. Termination mastic has been applied on cut edges.

11. Transition membranes are firmly adhered to substrate.

12. Compatible materials have been used.

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

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

15. All penetrations have been sealed.

D. Field Tests:

1. Allow sufficient time for testing and inspection and provide a schedule in advance to the Testing Agency.

2. Whenever Work is to be done, notify Testing Agency in sufficient time to arrange inspections.

3. Provide to the Owner copies of Quality Assurance Program documentation including daily site reports completed by installers.

4. Submit test results in accordance with specified standards, including retesting if initial results are not satisfactory.

5. Membrane Adhesion Test: Test materials for adhesion in accordance with ASTM D 4541 using a Type 1 pull tester except that the disk used shall be 2-1/4-inches (55-mm) to 4-inches (100-mm) in diameter and the membrane shall be cut through to separate the material attached to the disk from the surrounding material. Perform test after curing period recommended by the manufacturer. Record mode of failure and area which failed in accordance with ASTM D 4541.

a. Test Locations: Once daily per substrate during installation and a minimum of 4 tests per major elevation per substrate.

b. Provide an inspection report that indicates whether or not the air barrier material has met the minimum adhesion level requirement.

6. Quantitative Air-Leakage-Volume Testing: Air-barrier assemblies will be tested for air-leakage rate according to ASTM E 783.

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a. Test Locations:

1) Perform one test for the first 2500 sq. ft. of installed material for each wall assembly type.

2) Perform one subsequent test for every 5000 sq. ft. of installed material for each wall assembly type.

3) Test locations to be selected by Architect.

b. Test Size: 100 sq. ft. minimum.

c. Perform tests after cladding attachments have been installed but prior to the installation of cladding/veneer material.

d. Provide an inspection report that indicates results.

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.

3. Upon failure of testing:

a. Repair and retest area.

b. Provide an addition three tests for each occurrence of a failure.

F. Repair damage to air barriers caused by testing; follow manufacturer's written instructions.

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 required by manufacturer. If exposed to these conditions for longer than allowed by manufacturer, remove and replace air barrier or install additional, full-thickness, air-barrier application after repairing and preparing the overexposed membrane 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 by manufacturer of affected construction.

C. Remove masking materials after installation.

END OF SECTION