SIGA Cover Inc.

1229 N. North Branch Street, Suite 310

Chicago, Illinois 60642

Tel. 855-733-7442

SECTION 07 27 00

SELF-ADHERING WATER-RESISTIVE AIR BARRIER MEMBRANE

SIGA MAJVEST® 500 SA

(Specifier Note: This specification includes materials and installation procedures for Majvest® 500 SA Self-Adhered, Water-Resistive, Vapor Permeable Air Barrier Sheet Membrane. Majvest® 500 SA Self-Adhered sheet membrane is used behind rain screen wall cladding assemblies such as pressure equalized cladding systems incorporating composite and metal materials, masonry and stone veneers, stucco and mechanically attached EIFS.Majvest® 500 SA can be applied without the need of a primer.

This specification, prepared in CSI three (3) part format, should be adapted to suit the requirements of the individual project and be included as a separate Section under Division 07 - Thermal and Moisture Protection.

This document is a reference for the recommended installation procedures of the products/assembly described. Although this specification section follows the recommendations of the Construction Specifications Institute (CSI), Manual of Practice including Master Format, Section Format, and Page Format, it is the discretion of the project specification author to use the information within as a whole, or in part, to set a minimum standard of performance for specified products/assembly on a project specific basis. Update “[project specific]” notes and coordinate as required.

This document includes notes to assist the architect/specification writer. A SIGA “Specifier Note” will always immediately precede the text to which it is referring. This section serves as a guideline only; modify to meet specific project requirements.

Delete “Specifier Note” Sections in the final copy of the specification).

(Specifier Note: For wall systems anticipating prefabrication and installation of air barrier as a panelized design: contact SIGA applications advisor for assistance and consult the SIGA Manual

------

PART 1 - GENERAL

1.1GENERAL REQUIREMENTS

A.The General Conditions, Supplementary Conditions, Instructions to Bidders, and Division 01- General Requirements shall be read in conjunction with and govern this Section.

B.This Specification Section should be read by all parties concerned. The Contractor is solely responsible to make clear to the installing Subcontractor the extent of their Work.

C.This section specifies the requirements for the supply and installation of the elements required for vapour permeable air barrier membrane.

1.2SECTION INCLUDES

A.This Section includes requirements for supplying labor, materials, tools, and equipment to complete the Work as shown on the Drawings Architectural Division as specified herein including, but not limited to, the following:

  1. Adhesive/Primer (SIGA Dockskin®).
  2. Self-Adhered Water Resistive Vapor Permeable Air Barrier (SIGA Majvest® 500 SA).
  3. Flexible flashing tapes (SIGA Wigluv®).
  4. Sealant.
  1. Note to Specifier: Carefully and completely edit "WORK SPECIFIED IN OTHER SECTIONS" below to coordinate with other sections being included in the project manual.

1.3RELATED SECTIONS

(Specifier Note: Carefully and completely edit " RELATED SECTIONS" below to coordinate with other sections being included in the project manual).

A.DIVISION 04 – Section 04 20 00 – Unit Masonry.

B.DIVISION 05 – Section 05 50 00 – Metal Fabrications.

C.DIVISION 06 – Section 06 16 00 – Sheathing.

(Specifier Note: Contact product manufacturers and coordinate dampproofing/waterproofing with this Section to ensure compatibility and/or single source warranty).

D.DIVISION 07 – Section 07 10 00 – Dampproofing and Waterproofing.

(Specifier Note:Inclusion of plastic thermal insulation may require NFPA 285 compliance. Contact product manufacturers to confirm passing assemblies).

E.DIVISION 07 – Section 07 21 00 – Thermal Insulation.

(Specifier Note: Climate zones 4 through 7 require a vapor retarder in accordance with the International Building Code (IBC) and the National Building Code of Canada (NBC). Coordinate and/or delete related requirement below as needed).

F.DIVISION 07 – Section 07 26 00 – Vapor Retarders.

(Specifier Note: 2012 IECC requires a continuous air barrier on building envelope systems. Contact product manufacturers and coordinate membrane roofing with this Section to ensure compatibility and/or single source warranty).

G.DIVISION 07 – Section 07 50 00 – Membrane Roofing.

H.DIVISION 07 – Section 07 65 00 – Flexible Flashing.

(Specifier Note: Confirm compatibility of sealant and air barrier assembly and/or single source warranty:

  1. Contact product manufacturers and coordinate this Section with joint sealant Section 07 92 00.
  2. Contact product manufacturers and coordinate this Section glazing sealant Section 08 40 00).

I.DIVISION 07 – Section 07 92 00 – Joint Sealants.

J.DIVISION 08 – Section 08 11 00 – Metal Doors and Frames.

K.DIVISION 08 – Section 08 44 00 – Curtain Wall and Glazed Assemblies.

L.DIVISION 08 –Section 08 50 00 – Windows.

1.4REFERENCES

A.ASTM International (ASTM):

  1. ASTM C1305 – Crack bridging.
  2. ASTM D 882 - Test Method for Tensile Properties of Thin Plastic Sheeting.
  3. ASTM D1876- Test Method for Peel Resistance of Adhesives (T-Peel Test).
  4. ASTM D1970 - Test Method for Self-Adhering Polymer Modified Bituminous Sheet Materials Used as Steep Roofing Underlayment for Ice Dam Protection.
  5. ASTM D3330 - Test Method for Peel Adhesion of Pressure-Sensitive Tape.
  6. ASTM D4073-Test Method for Tensile-Tear Strength of Bituminous Roofing Membranes.
  7. ASTM D4541 Test Method for Pull-Off Strength of Coatings Using Portable Adhesion Testers.
  8. ASTM D5034 - Test Method for Breaking Strength and Elongation of Textile Fabrics.
  9. ASTM E 84 - Test Method for Surface Burning Characteristics of Building Materials.
  10. ASTM E 96 - Test Methods for Water Vapor Transmission of Materials.
  11. ASTM E 2178 - Test Method for Air Permeance of Building Materials.
  12. ASTM E2357 - Test Method for Determining Air Leakage of Air Barrier Assemblies.
  13. ASTM E283 - Test Method for Determining the Rate of Air Leakage Through Exterior Windows, Curtain Walls and Doors Under Specified Pressure Differences Across the Specimen.
  14. ASTM E330 - Test Method for Structural Performance of Exterior Windows, Doors, Skylights, and Curtain Walls by Uniform Static Air Pressure Difference.
  15. ASTM E331 - Test Method for Water Penetration of Exterior Windows, Skylights, Doors, and Curtain Walls by Uniform Static Air Pressure Difference.

B.American Association of Textile Chemists and Colorists (AATCC): AATCC 127 - Test Method for Water Resistance: Hydrostatic Pressure Test.

C.American Architectural Manufacturers Association (AAMA).

  1. AAMA 711-13 - Specification for Self-Adhering Flashing Used for Installation of Exterior Wall Fenestration Products.
  2. AAMA 2400-02 - Standard Practice for Installation of Windows with a Mounting Flange in Stud Frame Construction.

1.5SUBMITTALS

A.Refer to Section [01 33 00 Submittal Procedures] [insert section number and title].

B.Product Data: Submit manufacturers’ current product data sheets, details and installation instructions for the water-resistive, vapor permeable, air barrier and drainage matrix membrane components and accessories.

C.Manufacturer Instructions: Submit manufacturer’s written installation instructions.

1.6QUALITY ASSURANCE

A.Qualifications.

  1. Single Source: Self-adhered water-resistive vapor permeable air barrier membrane components and accessories must be obtained as a single-source membrane system to ensure total system compatibility and integrity.
  2. Verify product compliance with federal, state, and local regulations.
  3. Installer shall have experience with installation of self-adhered sheet membranes or/and adhesive backed commercial building wraps.
  4. Installation shall be in accordance with the manufacture’s installation guidelines and recommendations.
  5. Whenever possible, installer shall undergo an onsite SIGA installation training before the installation of SIGA products begin, at no charge.

B.Compliance with Standards: Products shall meet or exceed the requirements of AATCC 127, ASTM D 882, ASTM E 84, ASTM E 96, ASTM D 1970, ASTM E 2178, ASTM E 2357, ASTM E 330, ASTM E 331, ASTM D 5034.

C.Mock-Up: Install a mock-up using approved air barrier system including membrane, flashing, joint and detailing tape and related air barrier accessories according to the manufacturer’s current printed instructions and recommendations.

  1. Construct mockup in accordance with Section 01 43 39 – Mock-ups.
  2. Provide mockup of specified water-resistive, vapor permeable, air barrier materials under provisions of Section 01 33 23 Shop Drawings, Product Data and Samples.
  3. Where directed by [engineer] [architect] [consultant], construct typical exterior wall panel, 6-foot-long by 6-foot-wide incorporating the sheathing board or substrate, window rough opening preparation or flashing method, window frame and attachment method, clips, strapping or masonry ties, or cladding attachment components, attachment of insulation and detailing of water-resistive vapor permeable air barrier membrane application and lap seams.
  4. Perform water spray test of mockup to demonstrate performance, as per ASTM Standards.
  5. Allow 48 hours for inspection of mockup by [engineer] [architect] [consultant] before proceeding with water-resistive vapor permeable air barrier work. Mockup may remain as part of the work.

D.Pre-installation Meeting.

  1. Refer to Section [01 31 19 Project Meetings] [insert section number and title].

(Specifier Note:A Pre-installation meeting is mandatory for projects where the SIGA Weatherization Products 10 Year Limited Warranty is specified and recommended for all projects using SIGA Majvest 500 SA®. Requirement may be DELETED if SIGA Warranty is not specified).

  1. Convene a pre-installation conference, a minimum of two weeks prior to start of weather barrier installation. Attendees shall include Contractor, Architect, installer, and Air Barrier manufacturer’s designated field representative.
  2. Review all related project requirements and submittals, status of substrate work and preparation, areas of potential conflict and interface, availability of air barrier system materials and components, installer’s training requirements, equipment, facilities and scaffolding. Coordinate methods, procedures and sequencing requirements for full and proper installation, integration and protection.
  3. Review requirements for sequencing of installation of air water-resistive barrier system with installation of windows, doors, louvers and metal flashings to provide a weather-tight barrier system. Schedule installation of exterior cladding within three months of weather barrier system installation.

1.7DELIVERY, STORAGE, AND HANDLING

A.Deliver materials to Project site in original packages with seals unbroken, labeled with the material Manufacturer's name, product, date of manufacture, and directions for storage.

B.Store materials in their original undamaged packages in a clean, dry, protected location and within temperature range required by material manufacturer. Protect stored materials from direct sunlight.

C.Handle materials in accordance with material manufacturer’s recommendations.

D.Packaging Waste Management:

(Specifier Note: DELETED section below if packaging waste management doesn’t need to be specified)

  1. Separate and recycle waste packaging materials in accordance with Section 017419Construction Waste Management and Disposal.
  2. Remove waste packaging materials from site and dispose of packaging materials at appropriate recycling facilities.

1.8PROJECT CONDITIONS

A.Temperature: Install self-adhered sheet air barrier within range of ambient and substrate temperature, and moisture content recommended by the material manufacturer. Do not apply air barrier to a damp or wet substrate.

B.Field Conditions: Do not install air barrier materials in snow, rain, fog, or mist. Do not install air barrier when the temperature of substrate surfaces and surrounding air temperatures are below those recommended by the material manufacturer.

C.Sequencing. Do not install air barrier material before the roof assembly has been sufficiently installed to prevent a buildup of water in the interior of the building.

D.Compatibility. Do not allow air barrier materials to come in contact with chemically incompatible materials.

E.Ultra-violet exposure. Do not expose air barrier materials to sunlight longer than as recommended by the primary material manufacturer.

1.9WARRANTY

A.Manufacturer Warranty: Submit manufacturer’s standard 10-year warranty for weather barrier against defects in materials.

PART 2 - PRODUCTS

(Specifier Note: Product Information is proprietary to SIGA Majvest 500 SA®. If additional products are required for competitive procurement, contact SIGA applications advisor for assistance)

2.1MANUFACTURER

A.Self-adhered, water-resistive, vapor permeable air barrier and auxiliary materials shall comply with the following system requirements:

  1. Obtain air barrier and auxiliary materials as a single-source from the Air Barrier Manufacturer to ensure total system compatibility and integrity.
  2. Air leakage:
  3. ASTM E2357: Pass.
  4. ASTM 2178:Pass.
  5. Water resistance:
  6. AATCC 127: Pass (No leaks).
  7. ASTM E331: Pass (No leaks@ 12.11 psf (580 Pa) on opaque and penetrated wall).
  8. Nail Sealability:
  9. ASTM D1970 Section 7.9: Pass.

B.Acceptable Manufacturers:

SIGA Cover Inc

1229 N. North Branch Street, Suite 310

Chicago, Illinois 60642

(855) 733 7442

2.2MATERIALS

A.Basis of Design:PrimarySelf-adhered water-resistive vapor permeable air barrier sheet.

  1. Self-adhered, vapor permeable, water resistive, air barrier, composed of one microporous functional layer laminated between two non-woven Polypropylene (PP) layers, with full-coverage pressure-sensitive glue layer applied to the reverse.
  1. Performance Characteristics.
  1. Color: Light blue with black logo.
  2. Thickness: 28 mils (0.7 mm).
  3. Water Vapor Permeance: 13 US perms per ASTM E96, Method A
  4. Air leakage: <0.004 CFM/ft2 @ 1.57 lbs/ft2 [<0.02L/s/m2 @ 75Pa] when tested in accordance with ASTM E2178.
  5. Tested to ASTM E2357 for Air Leakage of Air Barrier Assemblies including ASTM E 283, ASTM E330, and ASTM E331.
  6. Water Penetration Resistance: ≥22 inches(55 cm) when tested in accordance with AATCC Test Method 127.
  7. Basis Weight: 0.84 (+/-0.05) oz./ft2.
  8. Tensile Strength≥ 20 lbf/in, when tested in accordance with ASTM D882.
  9. Surface Burning Characteristics: Class A, when tested in accordance with ASTM E84:

1) Flame Spread: 20.

2)Smoke Developed: 20.

  1. Atmospheric exposure of:

1)6 months (IECC zones 3-8)

2)3 months (IECC zones 1-2)

B.Assembly Auxiliary Materials:

(Specifier Note: Product Information is proprietary to SIGA Majvest® 500 SA. If additional products are required for competitive procurement, contact SIGA applications advisor for assistance).

(Specifier Note: Product listed below is only recommended for inclusion when required, and should be EDITED for specific project. When using SIGA Wigluv®, primer will be required in concrete, masonry, plaster and soft boards applications. For the correct choice of product for the intended application, the substrate matrix, the application recommendations and product information in the SIGA manual must be considered. The currently valid SIGA manual is available at

  1. Primer.
  1. Water-based, solvent-free, acrylate-copolymer dispersion adhesive for strengthening sandy and fibrous substrates; having the following typical physical properties:
  2. Basis of design: SIGA Dockskin®.
  3. Color: white.
  4. Maximum VOC content 0.1 g/L.
  5. Drying time (initial set): approx. 60 minutes.
  6. Low Application Temperature:14 degrees F (-10 degrees C).
  1. Flexible flashing tapes.

(Specifier Note: Flashing is dependent upon construction conditions. DELETE flashing products that are unnecessary and inappropriate for specific project)

  1. Pressure sensitive, with a modified acrylic based adhesive for bonds, window openings, penetrations, base joint connections, and at transitions between different assembly materials; having the following typical physical properties:
  2. Basis of design: SIGA Wigluv® 2.4” (60mm), or wider 4” (100mm), 6” (150mm),9” (230mm).
  3. Color: White with grey prints.
  4. Thickness: 14 mils (0.35 mm).
  5. Water Vapor Permeance: > 1.72 per ASTM E96, Method A
  6. Water penetration resistance around nails (modified ASTM D1970 per AAMA 711-13): Pass.
  7. Low Application temperature: from 14 degrees F (-10 degrees C).
  8. Atmospheric exposure of 12 months.
  1. Penetration and termination sealant.

(Specifier Note: Sealants are not required with the SIGA system but they could be recommended by the window manufacturer. If it’s the case sealants which are compatible with the air barrier may be specified in this section or in Division 07 sealants section)

  1. Provide sealant for penetrations as recommended by manufacturer and as specified under Division 07 Section: Sealants.
  2. Compatible with sheet air barrier, roofing and waterproofing membranes and substrate.
  1. Through-wall flashing membrane.

(Spec Note: Masonry Flashings are typically specified in Section 04 05 30. Coordinate material selections and applications with air barrier membrane systems)

  1. Provide Through-wall flashing membrane (Self-Adhering) for Masonry Flashings as recommended by manufacturer.
  2. Coordinate material selections and applications with air barrier membrane systems
  3. Compatible with sheet air barrier, roofing and waterproofing membranes and substrate.

PART 3 - EXECUTION

3.1EXAMINATION

A.Verify substrate and surface conditions are in accordance with manufacturer recommended tolerances prior to installation of Air Barrier and accessories.

  1. Verify that surfaces and conditions are suitable prior to commencing work of this section. Do not proceed with installation until unsatisfactory conditions have been corrected.
  2. Continuous substrate:
  3. Existing substrate must be continuous and secured prior to application of air barrier.
  4. Securely fasten sheathing panels and install flush to ensure a continuous substrate in accordance with Air Barrier Manufacturer’s installation guide and as specified in this Section.
  5. Fastener penetrations must be set flush with sheathing and fastened into solid backing.
  6. Refer to Air Barrier Manufacturer’s details.
  7. Strike masonry joints flushand brush to remove excess mortar.
  8. Concrete surfaces shall be smooth and without large voids, spalled areas or sharp protrusions. Refer to Air Barrier Manufacturer’s details for substrate gap limitations.
  9. Remove concrete forms and allow new concrete to cure for a minimum of fourteen (14) days.
  10. Curing compounds or release agents used in concrete construction must be resin based without oil, wax or pigments.
  11. Do not install air barrier over substrates that are wet to touch.

B.Notify Contractor in writing of any conditions that are not acceptable.

C.The installing contractor shall examine and determine that surfaces and conditions are ready to accept the Work of this Section in accordance with the Air Barrier Manufacturer’s installation guide and as specified in this Section. Commencement of Work or any parts thereof shall mean installer’s acceptance of the substrate.

D.Do not apply air barrier until substrate and environmental conditions are in accordance with Air Barrier Manufacturer’s installation guide and as specified in this Section.

3.2PREPARATION

A.All surfaces must be sound, dry, clean, and free of oil, grease, dirt, excess mortar, frost, laitance, loose and flaking particles, or other contaminants.

B.Protect adjacent surfaces not included in scope of Work to prevent spillage.

C.Cap and protect exposed back-up walls against wet weather conditions during and after application of the air barrier assembly.