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	SECTION 07270
	WEATHER RESISTIVE BARRIERS
	** NOTE TO SPECIFIER ** Fiberweb; sheathing membrane, air barrier, header wrap. This section is based on the products of Fiberweb, which is located at: 70 Old Hickory Blvd. Old Hickory, TN 37138 Toll Free: 800-284-2780 Phone: 615-847-7000 Fax: 615-847-7068 Email: moreinfo@typar.com Web: www.typar.com
	The Typar® Weather Protection System is developed and marketed by Fiberweb, one of the world's largest international non-woven fabrics and product innovation groups. In addition to construction materials, Fiberweb produces a complete range of non-woven products used in a variety of applications including landscaping products, geo textiles, filtration, hygiene, home care, home furnishings, electrical, medical and more.
	PART 1	GENERAL
	1.1	SECTION INCLUDES
		A.	Weather resistive barriers and accessories.
	1.2	RELATED SECTIONS
	** NOTE TO SPECIFIER ** Delete sections below not required for project; add others as required.
		A.	Section 06100 - Rough Carpentry: substrate
		B.	Section 06160 - Sheathing: substrate.
	1.3	REFERENCES
	** NOTE TO SPECIFIER ** Delete references from list below not required for project.
		A.	ASTM C 920 - Standard Specification for Elastomeric Joint Sealants.
		B.	ASTM D 779 - Standard Test Method for Water Resistance of Paper, Paperboard, and Other Sheet Materials by the Dry Indicator Method.
		C.	ASTM D 903 - Standard Test Method for Peel or Stripping Strength of Adhesive Bonds.
		D.	ASTM D 1970 - Standard Specification for Self-Adhering Polymer Modified Bituminous Sheet Materials Used as Steep Roofing Underlayment for Ice Dam Protection.
		E.	ASTM D 2523 - Standard Practice for Testing Load-Strain Properties of Roofing Membranes.
		F.	ASTM D 5733 - Standard Test Method for Tearing Strength of Nonwoven Fabrics by the Trapezoid Procedure.
		G.	ASTM E 96 - Standard Test Methods for Water Vapor Transmission of Materials.
		H.	ASTM E 283 - Standard Test Method for Determining Rate of Air Leakage Through Exterior Windows, Curtain Walls, and Doors Under Specified Pressure Differences Across the Specimen.
		I.	ASTM E 1677 - Standard Specification for an Air Retarder (AR) Material or System for Low-Rise Framed Building Walls.
		J.	ASTM E 2112 - Standard Practice for Installation of Exterior Windows, Doors and Skylights.
		K.	AATCC- 27 - Hydrostatic Head Test.
	1.4	SUBMITTALS
	** NOTE TO SPECIFIER ** Delete paragraphs below not required for project.
		A.	Submit under provisions of Section 01300.
		B.	Product Data: Manufacturer's data sheets on each product to be used, including:
			1.	Preparation instructions and recommendations.
			2.	Storage and handling requirements and recommendations.
			3.	Installation and maintenance methods.
		C.	Test Results: Submit copies of test results showing performance characteristics equaling or exceeding those specified.
		D.	Verification Samples: For each finish product specified submit 12 inch (305 mm) square sample.
	1.5	QUALITY ASSURANCE
	** NOTE TO SPECIFIER ** Delete paragraphs below not required for project.
		A.	Manufacturer Qualifications: Obtain primary materials from a single manufacturer regularly engaged in manufacturing building wraps. Obtain secondary materials from a source acceptable to the primary materials manufacturer.
		B.	Installer Qualifications: All products listed in this section are to be installed by a single installer with a minimum of two years demonstrated experience in installing products of the same type and scope as specified.
	1.6	DELIVERY, STORAGE, AND HANDLING
		A.	Deliver materials and products in unopened factory labeled packages.
		B.	Store and handle in strict compliance with manufacturer's instructions and recommendations.
		C.	Prevent damage or contamination to materials by construction activities.
	PART 2	PRODUCTS
	2.1	MANUFACTURERS
		A.	Acceptable Manufacturer: Fiberweb Typar, which is located at: 70 Old Hickory Blvd. ; Old Hickory, TN 37138; Toll Free Tel: 800-321-6271; Tel: 615-847-7000; Email: request info; Web: www.typar.com
	** NOTE TO SPECIFIER ** Delete one of the following two paragraphs; coordinate with requirements of Division 1 section on product options and substitutions.
		B.	Substitutions: Not permitted.
		C.	Requests for substitutions will be considered in accordance with provisions of Section 01600.
		D.	Obtain products from a single manufacturer.
	2.2	MATERIALS
		A.	Weather Resistive Barrier: Typar HouseWrap® by Fiberweb™, a non-woven, nonperforated spunbonded polypropylene weather membrane with microporous coating with the following performance characteristics.
			1.	Gurley Hill TAPPI T-460 or sec/100cc >2500.
			2.	Water Vapor Transmission 10-20 perms as tested by ASTM E 96, Method A.
			3.	Water penetration resistance of >800 cm on hydrostatic head in accordance with AATCC 127.
			4.	Trapezoidal Test of 30/33 lbs in accordance with ASTM D 5733.
			5.	Air-Ins < .02L/S*M2 @ 75 PA.
			6.	Dry Indicator Method ASTM D 779 equal to 24 hour rating.
			7.	Maximum Exposure Limit: 180 days.
	2.3	ACCESSORIES
	** NOTE TO SPECIFIER ** Manufacturer recommends sealing tape for use over Typar substrate, against Typar logo side coating. Delete the following paragraph if not required for project.
		A.	Sealing Tape:
			1.	Product: Typar® Construction Tape by Fiberweb™.
			2.	Description: Elastomeric polymer based, butyl rubber, rubber based, meeting ASTM C 920 evaluation.
		B.	Mechanical Fasteners:
	** NOTE TO SPECIFIER ** Manufacturer recommends plastic cap mechanical fasteners for use with substrate of wood, insulated sheathing board and exterior gypsum. Delete the following two paragraphs if not required for project.
			1.	Plastic cap nails.
			2.	Plastic cap staples.
	** NOTE TO SPECIFIER ** Manufacturer recommends rust resistant mechanical fasteners with washers for use over steel frame substrate. Delete the following paragraph if not required for project.
			3.	Rust-resistant screws with washers.
	** NOTE TO SPECIFIER ** Manufacturer recommends polyurethane sealant and masonry fasteners with washers for use over masonry substrate. Delete the following paragraph if not required for project.
			4.	Sealant: Polyurethane based, meeting ASTM C 920 evaluation.
			5.	Mechanical: Masonry fastener with washer.
	** NOTE TO SPECIFIER ** Delete paragraph below if not required for project.
		C.	Self-Adhering Sheet Flashing: Typar® Flashing Flex by Fiberweb™ with the following characteristics.
			1.	Face Material Composition: Conformable textured polyolefin.
			2.	Face Color: Dark gray.
			3.	Adhesive Composition: Butyl adhesive.
			4.	Thickness: 60 mil.
			5.	Release Liner: Siliconized paper.
			6.	Dimensions: 6 in (15.2 cm) x 75 ft (22.9 m), 9 in (22.7 cm) x 75 ft (22.9 m).
			7.	Low Temperature Flex: Meets or exceeds ASTM D 903.
			8.	Nail Sealability: Meets or exceeds ASTM D 1970.
			9.	Tensile Strength: Meets or exceeds ASTM D 2523.
			10.	Maximum Exposure Limit: 90 days.
	** NOTE TO SPECIFIER ** Delete paragraph below if not required for project.
		D.	Self-Adhering Sheet Flashing: Typar® Flashing BA by Fiberweb™ with the following characteristics.
			1.	Face Material Composition: Conformable Textured Polyolefin.
			2.	Face Color: Gray.
			3.	Adhesive Composition: Butyl adhesive.
			4.	Thickness: 25 mil.
			5.	Release Liner: Siliconized paper.
			6.	Dimensions: 4 in (10.2 cm), 6 in (15.2 cm) x 75 ft (22.9 m), 9 in (22.7 cm) x 75 ft (22.9 m).
			7.	Low Temperature Flex: Meets or exceeds ASTM D 903.
			8.	Nail Sealability: Meets or exceeds ASTM D 1970.
			9.	Tensile Strength: Meets or exceeds ASTM D 2523.
			10.	Maximum Exposure Limit: 180 days.
	** NOTE TO SPECIFIER ** Delete paragraph below if not required for project.
		E.	Self-Adhering Sheet Flashing: Typar® Flashing RA by Fiberweb™ with the following characteristics.
			1.	Face Material Composition: Polyolefin.
			2.	Face Color: Gray.
			3.	Adhesive Composition: Rubberized asphalt.
			4.	Thickness: 25 mil.
			5.	Release Liner: Siliconized paper.
			6.	Dimensions: 4 in (10.2 cm) x 75 ft (22.9 m), 6 in (15.2 cm) x 75 ft (22.9 m), 9 in (22.7 cm) x 75 ft (22.9 m), 12 in (30.5 cm) x 75 ft (22.9 m).
			7.	Low Temperature Flex: Meets or exceeds ASTM D 903.
			8.	Nail Sealability: Meets or exceeds ASTM D 1970.
			9.	Tensile Strength: Meets or exceeds ASTM D 2523.
			10.	Maximum Exposure Limit: 90 days.
	** NOTE TO SPECIFIER ** Delete paragraph below if not required for project.
	PART 3	EXECUTION
	3.1	EXAMINATION
		A.	Do not begin installation until substrates have been properly prepared.
		B.	If substrate preparation is the responsibility of another installer, notify Architect of unsatisfactory preparation before proceeding.
	3.2	PREPARATION
		A.	Clean surfaces thoroughly prior to installation.
		B.	Prepare surfaces using the methods recommended by the manufacturer for achieving the best result for the substrate under the project conditions.
	3.3	INSTALLATION
		A.	Installation of HouseWrap: Comply with manufacturer's installation instructions including but not limited to the requirements specified in this section. Sequence construction such that HouseWrap is not exposed for more than 6 months before covering material is applied.
			1.	Overlaps: Install shingle style to shed water, with minimum 2 inch (5 cm) overlap horizontally, 6 inch (30 cm) overlap vertically, and 12 inches (30 cm) overlap at corners, at all locations where this is possible.
			2.	Fasteners at Wood Studs: Use manufacturer's recommended fasteners with plastic heads. Use 2 inch (5 cm) long plastic headed nails or plastic headed screws when 1/2 inch (1.2 cm) thick OSB sheathing is used.
			3.	Fasteners at Metal Studs: Use manufacturer's recommended fasteners with 2 inch (5 cm) plastic disk around shank of No. 10 stainless steel self-taping screws. Use 2 inch (5 cm) long screws when 1/2 inch (1.2 cm) thick gypsum board is used.
			4.	Fastening at Concrete Block and Poured Concrete: Adhesive recommended by manufacturer.
			5.	Fastener Pattern: Attach one fastener or more every 24 inches (60 cm) in horizontal and vertical direction.
			6.	Edge Seal Where Material is Sealed to Itself: Typar Construction Tape.
			7.	Edge Seal Where Material is Sealed to Adjacent Material: Install approved sealant on them substrate 1 inch (2.5 cm) to 2 inches (5 cm) back from the edge of the HouseWrap. Press HouseWrap into the sealant to create air and water seal. If required by location of termination, provide furring strip to hold the HouseWrap in place.
			8.	Edge Seal at Penetrations: Install approved sealant on the substrate 1 inch (2.5 cm) back from the edge of the cut. Press HouseWrap into the sealant to create air and water seal. Install Typar® Flashing Flex, Typar® Flashing BA or Typar® Flashing RA as specified on the exterior of the HouseWrap to join the material to the penetration.
			9.	Final Inspection of HouseWrap: When each section is complete, the installer shall visually inspect the installation and verify that all rows of material have overlapped the row below it, that all materials and components have been installed in a shingle fashion, that the fasteners are the proper ones, that the nailing pattern is correct, that all penetrations and terminations have been done correctly and that doors and windows have been properly flashed and integrated into the HouseWrap material.
			10.	The installer shall repair any cuts or tears with Typar® Construction Tape.
		B.	Install prior to installation of windows in accordance with manufacturer's instructions over exterior sheathing or open studs.
		C.	Air infiltration barrier shall be air tight and free from holes, tears, and punctures.
		D.	All window and door penetrations are to be flashed and sealed per ASTM E 2112, AMMA guidelines and manufacturer instructions.
		E.	Cover with exterior cladding within 6 months of installation.
	3.4	PROTECTION
		A.	Protect installed products until completion of project.
		B.	Touch-up, repair or replace damaged products before Substantial Completion.
	END OF SECTION