07 27 26.pdf

VBDZ192001 Renovate Operations Building 2A 101418 STRATTON ANGB, SCOTIA, NY Amendment #1 5/12/2021

SECTION 07 27 26

FLUID-APPLIED MEMBRANE AIR BARRIER

02/12

PART 1 GENERAL

1.1 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 A240 (2012) Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications

ASTM C1193 (2013) Standard Guide for Use of Joint Sealants

ASTM C1305 (2008) Standard Test Method for Crack Bridging Ability of Liquid-Applied Waterproofing Membrane

ASTM C920 (2018) Standard Specification for Elastomeric Joint Sealants

ASTM D1970/D1970M (2015a) Self-Adhering Polymer Modified Bituminous Sheet Materials Used as Steep Roofing Underlayment for Ice Dam Protection

ASTM D2000 (2012; R 2017) Standard Classification System for Rubber Products in Automotive Applications

ASTM D412 (2016) Standard Test Methods for Vulcanized Rubber and Thermoplastic Elastomers - Tension

ASTM D4258 (2005) Standard Practice for Surface Cleaning Concrete for Coating

ASTM D4263 (1983; R 2012) Indicating Moisture in Concrete by the Plastic Sheet Method

ASTM D5590 (2000; R 2010; E 2012) Standard Test Method for Determining the Resistance of Paint Films and Related Coatings to Fungal Defacement by Accelerated Four-Week Agar Plate Assay

ASTM E1186 (2017) Standard Practices for Air Leakage Site Detection in Building Envelopes and Air Barrier Systems

SECTION 07 27 26 Page 1

ASTM E162 (2012a) Surface Flammability of Materials Using a Radiant Heat Energy Source

ASTM E2178 (2013) Standard Test Method for Air Permeance of Building Materials

ASTM E2357 (2017) Standard Test Method for Determining Air Leakage of Air Barrier Assemblies

ASTM E283 (2004; R 2012) Standard Test Method for Determining the Rate of Air Leakage Through Exterior Windows, Curtain Walls, and Doors Under Specified Pressure Differences Across the Specimen

ASTM E331 (2000; R 2016) Standard Test Method for Water Penetration of Exterior Windows, Skylights, Doors, and Curtain Walls by Uniform Static Air Pressure Difference

ASTM E783 (2002; R 2010) Standard Test Method for Field Measurement of Air Leakage Through Installed Exterior Windows and Doors

ASTM E96 (2012) Standard Test Methods for Water Vapor Transmission of Materials

U.S. ENVIRONMENTAL PROTECTION AGENCY (EPA)

EPA Method 24 (2000) Determination of Volatile Matter Content, Water Content, Density, Volume Solids, and Weight Solids of Surface Coatings

U.S. NATIONAL ARCHIVES AND RECORDS ADMINISTRATION (NARA)

40 CFR 59-Subpart D National Volatile Organic Compound Emission Standards for Architectural Coatings

1.2 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. Submittals with an "S" are for inclusion in the Sustainability Notebook, in conformance to Section 01 33 29.00 06 SUSTAINABILITY REPORTING. The following shall be submitted in accordance with Section 01 33 00.00 06 SUBMITTAL PROCEDURES:

SD-03 Product Data

Fluid-Applied Membrane; G

Primer; G

Moisture Meter; G

SECTION 07 27 26 Page 2

Bond Breaker; G

Submit material description and physical properties, application details, and recommendations regarding shelf life, application procedures, and precautions on flammability and toxicity.

SD-11 Closeout Submittals

Warranty; G

Include copies of Material Safety Data Sheets for maintenance/repair materials.

1.3 FLUID-APPLIED MEMBRANE AIR BARRIER CONFERENCE

Prior to starting application of fluid-applied membrane air barrier system, arrange and attend a prewaterproofing conference to ensure a clear understanding of Drawings and Specifications. Give the Contracting Officer 7 days advance written notice of the time and place of meeting.

Ensure that the Mechanical and Electrical Subcontractor, Flashing and Sheetmetal Subcontractor, and other trades that may perform other types of work on or over the membrane after installation, attend this conference.

1.4 DELIVERY, STORAGE, AND HANDLING

Deliver fluid-applied membrane air barrier materials in manufacturer's original, unopened containers, with labels intact and legible. Containers of materials covered by a referenced Specification number shall bear the Specification number, type, and class of the contents. Deliver materials in sufficient quantity to continue work without interruption. Store and protect materials in accordance with manufacturer's instructions, and use within their indicated shelf life. When hazardous materials are involved, adhere to special precautions of the manufacturer, unless precautions conflict with local, State, and Federal regulations. Promptly remove from the Site materials or incomplete work adversely affected by exposure to moisture or freezing. Store materials on pallets and cover from top to bottom with canvas tarpaulins.

1.5 ENVIRONMENTAL CONDITIONS

Apply materials when ambient temperature is 40 degrees F or above for a period of 24 hours prior to the application and when there is no ice, frost, surface moisture, or visible dampness on the substrate surface.

Apply materials when air temperature is expected to remain above 40 degrees F during the cure period recommended by the manufacturer.

Moisture test for substrate is specified under Paragraph entitled "Moisture Test." Work may be performed within heated enclosures, provided the surface temperature of the substrate is maintained at a minimum of 40 degrees F for 24 hours prior to the application of the waterproofing, and remains above that temperature during the cure period recommended by the manufacturer.

1.6 WARRANTY

Provide system material and workmanship warranties meeting specified requirements. Provide revisions or amendment to standard membrane manufacturer warranty to comply with the specified requirements. Minimum manufacturer warranty shall have no dollar limit, cover full system water-tightness, and shall have a minimum duration of 20 years.

SECTION 07 27 26 Page 3

1.6.1 Fluid-Applied Membrane Air Barrier Manufacturer Warranty

Furnish the fluid-applied membrane air barrier manufacturer's 20-year no dollar limit roof system materials and installation workmanship warranty, including flashing, insulation, and accessories necessary for a watertight roof system construction. Write the warranty directly to the Government commencing at time of Government's acceptance of the roof work. Provide the the following statements for such warranty:

a. If within the warranty period the roof system, as installed for its intended use in the normal climatic and environmental conditions of the facility, becomes non-watertight, shows evidence of moisture intrusion within the assembly, blisters, splits, tears, cracks, delaminates, separates at the seams, or shows evidence of excessive weathering due to defective materials or installation workmanship, the repair or replacement of the defective and damaged materials of the fluid-applied membrane air barrier system assembly and correction of defective workmanship are the responsibility of the roof membrane manufacturer. All cost associated with the repair or replacement work are the responsibility of the roof membrane manufacturer.

b. The warranty must remain in full force and effect, including emergency temporary repairs performed by others, when the manufacturer or his approved applicator fail to perform the repairs within 72 hours of notification.

1.6.2 System Installer Warranty

The system installer must warrant for a minimum period of two years that the system, as installed, is free from defects in installation workmanship, to include the roof membrane, flashing, insulation, accessories, attachments, and sheet metal installation integral to a complete watertight system assembly. Write the warranty directly to the Government. The roof system installer is responsible for correction of defective workmanship and replacement of damaged or affected materials.

The roof system installer is responsible for all costs associated with the repair or replacement work.

1.6.3 Continuance of Warranty

Approve repair or replacement work that becomes necessary within the warranty period and accomplished in a manner so as to restore the integrity of the roof system assembly and validity of the roof membrane manufacturer warranty for the remainder of the manufacturer warranty period.

1.7 DEFINITIONS

Air Barrier Assembly: The collection of air barrier materials and auxiliary materials applied to an opaque wall, including joints and junctions to abutting construction, to control air movement through the wall.

1.8 PERFORMANCE REQUIREMENTS

a. General: Air barrier shall be capable of performing as a continuous vapor-permeable air barrier. Air barrier assemblies shall be capable of accommodating substrate movement and of sealing substrate expansion

SECTION 07 27 26 Page 4 and control joints, construction material changes, and transitions at perimeter conditions without deterioration and air leakage exceeding specified limits.

b. Installed Product and Accessories constitute an air barrier assembly, which shall be air-tight, durable and continuous.

c. Installed Product and Accessories shall exhibit no visible water leakage when tested per ASTM E331 and shall perform as a liquid water drainage plane flashed to discharge to the exterior any incidental condensation or water penetration.

d. Installed Product and Accessories shall exhibit an air leakage assembly per test method E2357.

e. Product shall be solvent free, have VOC content of not more than 55 grams per liter and shall be free of noxious odors and isocyanates.

f. Product, when applied at minimum 60 mils wet, 36 mils dry, shall meet the following requirements:

REQUIREMENT RESULT TEST METHOD

Air Permeance 0.001 liters per second per square meter of area at 75 Pa pressure differential

ASTM E2178 modified, spray-applied over medium density concrete masonry unit (CMU) wall

Tensile Strength Not less than 100 psi ASTM D412

Tensile Elongation Not less than 270% ASTM D412

Low Temperature Flexibility Pass 1" @ -20 degrees F

ASTM D1970/D1970M

Low Temperature Crack Bridging

No cracking after 10 cycle @ 15 degrees F

ASTM C1305

Water Vapor Permeance Not less than 0.03 perms ASTM E96, Method A

Mold Resistance No growth ASTM D5590

1.9 ACTION SUBMITTALS

a. Submit as specified in Division 01.

b. LEED Submittals:

(1) Product Data for Credit IEQ 4.2: For air barrier products including primers, documentation including printed statement of VOC content.

(2) Product Data for Credit IEQc4.1: For joint sealants and adhesives installed inside the weatherproofing barrier of the building and installed on-site, submit documentation including manufacturers printed statement (MSDS Sheet) of VOC content of each product.

SECTION 07 27 26 Page 5

(3) Product Data for Credit MRc4: For products containing recycled content, submit documentation indicating percentages, by weight, of post-consumer and pre-consumer recycled content for each product or portion of a product having recycled content. Include statement indicating cost for each product containing recycled content material.

(4) Product Data for Credit MRcS: For products and materials complying with requirements for regional materials, submit documentation indicating location and distance from Project of material manufacturer and point of extraction, harvest, or recovery for each raw material. Include statement indicating cost for each regional material and the fraction by weight that is considered regional.

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

d. Shop Drawings: Show locations and extent of air barrier. Include details for substrate joints and cracks, counterflashing strip, penetrations, inside and outside corners, terminations, and tie-ins with adjoining construction.

(1) Include details of interfaces with other materials that form part of air barrier.

1.10 INFORMATIONAL SUBMITTALS

a. Product Certificates: For air barriers, certifying compatibility of air barrier and accessory materials with Project materials that connect to or that come in contact with the barrier; signed by product manufacturer.

b. Qualification Data: For Applicator.

c. Product Test Reports: Based on evaluation of comprehensive tests performed by a qualified testing agency, for air barriers.

1.11 QUALITY ASSURANCE

a. Applicator Qualifications: A firm 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 and that is an ABAA-licensed Contractor, employs certified and registered installers, and complies with ABAA's Quality Assurance Program.

b. Preinstallation Conference: Conduct conference at Project Site.

PART 2 PRODUCTS

2.1 FLUID-APPLIED MEMBRANE AIR BARRIER

a. Source Limitations: Obtain primary air-barrier materials and air-barrier accessories from single source from single manufacturer.

b. VOC Content: 50 g/L less when calculated according to

SECTION 07 27 26 Page 6

40 CFR 59-Subpart D ( EPA Method 24 ) and complying with VOC content limits of authorities having jurisdiction.

c. Fluid-Applied, Vapor-Permeable Membrane Air Barrier: Synthetic polymer membrane.

(1) Available Products: Subject to compliance with requirements, products that may be incorporated into the Work include, but are not limited to, the following:

(2) Products: Subject to compliance with requirements, provide one of the following or equal:

(a) Synthetic Polymer Membrane:

1. Carlisle Coatings and Water Proofing: BarriTech VP.

2. Henry: Air-Bloc 17 MR.

3. BASF Enershield - HP.

(3) Physical and Performance Properties:

(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 assemblies shall be capable of accommodating substrate movement and of sealing substrate expansion and control joints, construction material changes, penetrations, and transitions at perimeter conditions without deterioration and air leakage exceeding 0.04 cfm/sq ft of surface area at 1.57 lbf/sq ft when tested according to ASTM E283, ASTM E783, or ASTM E2357.

(b) Membrane Air Permeance: Not to exceed 0.004 cfm/ sq ft of surface area at 1.57-lbf/sq ft pressure difference; ASTM E2178.

(c) Membrane Vapor Permeance: Not less than 10 perms; ASTM E96.

2.2 AUXILIARY MATERIALS

a. General: Auxiliary materials recommended by air barrier manufacturer for intended use and compatible with air barrier membrane.

Liquid-type auxiliary materials, including primers, adhesives and foam sealants, shall not exceed VOC limits of authorities having jurisdiction and requirements as listed in Section 01 33 29.00 06 SUSTAINABILITY REPORTING for the application.

b. Primer: Liquid solvent-borne primer recommended for substrate by manufacturer of air barrier material.

c. Counterflashing Strip: Modified bituminous, 40-mil- thick, self-adhering sheet consisting of 32 mils of rubberized asphalt laminated to an 8-mil thick, cross-laminated polyethylene film with release liner backing.

d. Butyl Strip: Vapor-retarding, 30- to 40-mil thick, self-adhering;

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

SECTION 07 27 26 Page 7

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

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

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

h. Stainless-Steel Sheet: ASTM A240, Type 304, 0.0250 inch thick, and Series 300 stainless-steel fasteners.

i. Sprayed Polyurethane Foam Sealant: 1- or 2-component, foamed-in-place, polyurethane foam sealant, 1.5 to 2.0 lb/cu ft density; flame spread index of 25 or less according to ASTM E162; with primer and non-corrosive substrate cleaner recommended by foam sealant manufacturer.

j. Adhesive-Coated Transition Strip: Vapor-permeable, 17-mil thick, self-adhering strip consisting of an adhesive coating over a permeable laminate with a permeance of 37 perms.

k. Elastomeric Flashing Sheet: ASTM D2000, 2BC415 to 3BC620, minimum 50-to 65-mil thick, cured sheet neoprene with manufacturer's recommended contact adhesives and lap sealant with aluminum termination bars and stainless-steel fasteners.

l. 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.

m. Joint Sealant: ASTM C920, 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 Division 07, Section "Joint Sealants."

2.3 BOND BREAKER

As recommended by the fluid-applied membrane manufacturer. Bond breaker shall not interfere with the curing process or other performance properties of the fluid-applied membrane.

PART 3 EXECUTION

3.1 EXAMINATION

a. Examine substrates, areas, and conditions, with Installer present, for compliance with requirements and other conditions affecting performance.

(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

SECTION 07 27 26 Page 8 capillary moisture by plastic sheet method according to ASTM D4263.

(4) Verify that masonry joints are flush and completely filled with mortar.

(5) 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.

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, grout, and fill joints and cracks in substrate according to ASTM C1193 and air barrier manufacturer's written instructions. Remove dust and dirt from joints and cracks complying with ASTM D4258 before coating surfaces.

(1) Prime substrate and apply a single thickness of preparation coat strip extending a minimum of 3 inches along each side of joints and cracks. Apply a double thickness of air barrier membrane and embed a joint reinforcing strip in preparation coat.

3.4 TRANSITION STRIP INSTALLATION

a. Install strips, transition strips, and auxiliary materials according to air barrier manufacturer's written instructions to form a seal with adjacent construction and maintain a continuous air barrier.

b. Apply primer to substrates at required rate and allow to dry. Limit priming to areas that will be covered by air barrier sheet in same day. Reprime areas exposed for more than 24 hours.

SECTION 07 27 26 Page 9

c. Connect and seal exterior wall air barrier membrane 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.

d. At end of each working day, seal top edge of strips and transition strips 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 reinforced flashing sheet so that a minimum of 3 inches of coverage is achieved over both substrates. Maintain 3 inches of full contact over firm bearing to perimeter frames with not less than 1 inch of full contact.

(1) Transition Strip: Roll firmly to enhance adhesion.

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

(3) Preformed Silicone-Sealant Extrusion: Set in full bed of silicone sealant applied to walls, frame, and membrane.

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

h. Seal strips and transition strips around masonry reinforcing or ties and penetrations with termination mastic.

i. Seal top of through-wall flashings to air barrier with an additional 6-inch- wide, counterflashing strip.

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

k. 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.

3.5 AIR BARRIER MEMBRANE INSTALLATION

a. Apply air barrier membrane to form a seal with strips and transition strips and to achieve a continuous air barrier according to air barrier manufacturer's written instructions.

b. Apply air barrier membrane within manufacturer's recommended application temperature ranges.

SECTION 07 27 26 Page 10

c. Apply primer to substrates at required rate and allow to dry. Limit priming to areas that will be covered by air barrier sheet in same day. Reprime areas exposed for more than 24 hours.

(1) Prime glass-fiber-surfaced gypsum sheathing with number of prime coats needed to achieve required bond, with adequate drying time between coats.

d. Apply a continuous unbroken air barrier to substrates according to the following minimum thickness. Apply membrane in full contact around protrusions such as masonry ties.

(1) Vapor-Permeable Membrane Air Barrier: 47-mil minimum dry film thickness.

e. Apply strip and transition strip a minimum of 1 inch onto cured air membrane or strip and transition strip over cured air membrane overlapping 3 inches onto each surface according to air barrier manufacturer's written instructions.

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

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

3.6 FIELD QUALITY CONTROL

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

b. Inspections: Air barrier materials 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) Continuous structural support of air barrier system has been provided.

(3) Masonry and concrete surfaces are smooth, clean and free of cavities, protrusions, and mortar droppings.

(4) Site conditions for application temperature and dryness of substrates have been maintained.

(5) Maximum exposure time of materials to UV deterioration has not been exceeded.

(6) Surfaces have been primed, if applicable.

(7) 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.

(8) Termination mastic has been applied on cut edges.

SECTION 07 27 26 Page 11

(9) Strips and transition strips have been firmly adhered to substrate.

(10) Compatible materials have been used.

(11) Transitions at changes in direction and structural support at gaps have been provided.

(12) Connections between assemblies (membrane and sealants) have complied with requirements for cleanliness, preparation and priming of surfaces, structural support, integrity, and continuity of seal.

(13) All penetrations have been sealed.

c. Tests: Testing to be performed will be determined by Owner's testing agency from among the following tests:

(1) Qualitative Testing: Air barrier assemblies will be tested for evidence of air leakage according to ASTM E1186, smoke pencil with pressurization or depressurization.

(2) Quantitative Air Leakage Testing: Testing not to exceed the test pressure differential, positive and negative, indicated in "Performance Requirements" article for air barrier assembly air leakage according to ASTM E283.

d. Remove and replace deficient air barrier components and retest as specified above.

e. Moisture Test: Prior to application of fluid-applied waterproofing, measure moisture content of substrate with a moisture meter in the presence of the Contracting Officer. An acceptable device is the Delmhorst Moisture Meter, Model BD7/2E/CS, Type 21 E. Similar meters by other manufacturers, which are suitable for the purpose, may be used as approved by the Contracting Officer. Do not begin application until meter reading indicates "dry" range.

f. Film Thickness: Measure wet film thickness every 100 square feet during application by placing flat metal plates on the substrate or using a mil-thickness gauge especially manufactured for the purpose.

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. Remove and replace air barrier exposed for more than 30 days.

(2) Protect air barrier from contact with creosote, uncured coal-tar products, TPO, EPDM, flexible PVC membranes, 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.

SECTION 07 27 26 Page 12

c. Remove masking materials after installation.

-- End of Section --

SECTION 07 27 26 Page 13