Features

Moisture safety in CLT construction without weather protection – Case studies, literature review and interviews

PHYSICAL PROPERTIES
PROPERTY	RESULT
Color	White
Thickness	10.2 mil (0.26 mm)
Membrane Weight (without release film)	0.95 oz/yd² (289 g/m²)
60" Roll Weight (with release film)	48 lbs (22 kg)
30" Roll Weight (with release film)	25 lbs (11 kg)
Roll Dimensions	60" x 100' (1.5 m x 30.5 m) 30" x 100' (.76 m x 30.5 m)
Roll Coverage	60" 500 ft² (46.5 m²) gross 30" 250 ft² (23.2 m²) gross
Primer	No Primer Required
VOCs	None
Field Exposure Before Permanent Cladding	6 months
Minimum Application Temperature	20°F (-6°C)
Service Temperature	minus 40°F (-40°C) - 200°F (93.3°C)
AAMA 711-13	Compliant
Warranty	20 years

TESTING DATA
PROPERTY	STANDARD	RESULT
Strength
Elongation	ASTM D412 Standard Test Methods for Vulcanized Rubber and Thermoplastic Elastomers—Tension	MD - 409% XMD - 276%
Tensile Strength	ASTM D412 Standard Test Methods for Vulcanized Rubber and Thermoplastic Elastomers—Tension	MD - 16.96 MPa (2460 psi) XMD - 11.87 MPa (1721 psi)
Dry Tensile Strength	ASTM D882 Standard Test Method for Tensile Properties of Thin Plastic Sheeting	MD - 3.85 N/mm (22 lbf/in) XMD - 3.85 N/mm (22 lbf/in)
Elongation at Break	ASTM D882 Standard Test Method for Tensile Properties of Thin Plastic Sheeting	MD - 541% XMD - 617%
Dry Breaking Force (Grab method) MD ≥40 XMD ≥35	ASTM D5034 Standard Test Method for Breaking Strength and Elongation of Textile Fabrics (Grab Test)	MD – 338 N (76 lbsf) CD – 356 N (80 lbsf)
Elongation at Break	ASTM D5034 Standard Test Method for Breaking Strength and Elongation of Textile Fabrics (Grab Test)	MD - 120% XMD - 157%
Minimum Puncture Resistance	ASTM E154 Standard Test Methods for Water Vapor Retarders Used in Contact with Earth Under Concrete Slabs, on Walls, or as Ground Cover	Deflection 5.84 cm (2.3") Max Load 249 N (56 lbf)
Cold Mandrel Bend Test	AC38 Section 3.3.4	PASS
Weathering Tests	AC38 Section 4.1.2 UV Exposure AC38 Section 4.1.3 Accelerated Aging	PASS
Water Vapor Transmittance
Water Vapor Transmission Desiccant Method Procedure A 23°C (73.4°F) 0-50 %RH	ASTM E96 Standard Test Methods for Water Vapor Transmission of Materials	0.0173 Perm (grain/h•ft²•inchHg) @23°C 100%RH 0.992 ng/Pa•s•m²
Water Vapor Transmission Using Modulated Infrared Sensor	ASTM F1249 Standard Test Method for Water Vapor Transmission Rate Through Plastic Film and Sheeting Using a Modulated Infrared Sensor	0.0193 Perm (grain/h•ft2•inchHg) 1.10 ng/Pa•s•m2
Air Resistance Testing
Air Permeance	ASTM E2178 @75 Pa Standard Test Method for Air Permeance of Building Materials	0.00912 L/s•m² @ 75 Pa (0.0018 cfm/ft² @ 1.57 psf)
Air Permeance	CAN/ULC-S741-08 (2020) Standard for Air Barrier Materials	PASS
Air Permeance	CAN/ULC-S742-11 Standard for Air Barrier Assemblies	Class A1
Adhesion Testing
Adhesion after Water Immersion	AAMA 711	PASS
Water Resistance Testing
Nail Sealability	ASTM D1970 Standard Specification for Self-Adhering Polymer Modified Bituminous Sheet Materials Used as Steep Roofing Underlayment for Ice Dam Protection Section 7.9 referring to ASTM D7349 protocol 4 with modifications	PASS
Water Resistance (Control after Weathering)	AATCC 127 Hydrostatic pressure test (550 mm water column for 5 hours), American Association of Textile Chemists and Colorists	PASS
Fire Testing
Flame Spread Smoke Developed	ASTM E84 Standard Test Method for Surface Burning Characteristics of Building Materials	Flame Spread 5 (Class A) Smoke Developed 15
UL	UL790 Test Method of Fire Tests for Roof Coverings, CAN/ULC-S107	PASS

ROOF TESTING DATA
PROPERTY	STANDARD	RESULT
Uplift Strength	FM LPDS 1-52 Field Verification of Roof Wind Uplift Resistance	Steel Deck 11.12 kN/m² (232.5 psf)
90-Degree Peel Strength	ASTM D3330 Standard Test Method for Peel Adhesion of Pressure-Sensitive Tape. Method F	Steel Deck 879 N/m (5.02 lb/in)
		Gypsum Board 751 N/m (4.29 lb/in)
		Coated Fiberglass Faced Board 380 N/m (2.27 lb/in)
Wear Resistance	Wheelbarrow Testing	PASS

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Overview

BlockShield SA Plus is a self-adhered, non-asphaltic air and vapor barrier roofing underlayment designed for applications either direct to deck or over a thermal barrier board.
BlockShield SA Plus is made from a proprietary high strength polypropylene sheet with a very aggressive adhesive layer that effectively bonds to virtually all deck types.
BlockShield SA Plus can be installed on steep slope roofs (>2”:12”) and on low slope roofs (1/4":12" <2":12") in both commercial and residential construction.
Top surface is slip resistant, UV stable, and resistant to punctures, tears, and foot traffic.

LowSlope Sidebyside Install WebImages

Product Applications

Apply directly to galvanized or painted steel Type B Deck
Apply to thermal board fastened to galvanized steel deck
OSB
Plywood
Gypsum

Safety

CAUTION: Release liners are slippery. To prevent injury, liner should be removed from under foot as soon as membrane is installed and disposed of properly.
Persons who access any roofs, involved with roof construction, repair or maintenance shall use appropriate personal protective equipment including, but not limited to, hard hats, eye protection, and leather gloves and must be trained on safe practices relevant to their work.
Where the use of ladders, scaffolds, platforms, or temporary floors are utilized, safety lines and safety harnesses shall be used. Please access the OSHA Web site at www.osha. gov, contact your local OSHA office, or visit the local federal bookstore to obtain the most current information on OSHA 29 CFR 1926.

Delivery, Packaging And Storage

Store roll materials vertically on end in original packaging at temperatures between 40°F and 120°F (4ºC - 49ºC).
Protect materials from direct sunlight and inclement weather until ready for use.

Substrate Information

Steel surfaces must be clear of any oil residue and moisture. Wood decks must be dry to the touch and clear of dirt and dust. BlockShield SA Plus can be installed in 20°F (-6°C) and rising temperatures. BlockShield SA Plus surface is white, reducing the overall temperature gain during installation.

Installation Best Practices

BlockShield Roof Flat Installation step 1 041323

STEP 1
Unroll BlockShield SA Plus onto the clean, dry steel deck.

Once BlockShield SA Plus is in place, while holding the sheet tight, remove the silicone release film by pulling diagonally.

STEP 2
When installing subsequent rolls of BlockShield SA Plus ensure 3” (7.5 cm) side laps are maintained.

After multiple rolls are installed, roll the membrane with a weighted roller, min. 70 lbs.

CAUTION: Release liners are slippery. To prevent injury, liner should be removed from under foot as soon as membrane is installed and disposed of properly.

BestPractice web images 03

STEP 3
At the end of each roll, install a metal sheet plate (24 GA x 6"W) to support the end lap between flutes. Ensure 6" (15.2 cm) end laps are maintained on metal sheet plate for each course during installation.

BlockShield Roof Flat Installation 4 022723

STEP 4
Cover as soon as possible to limit exposure to UV and construction traffic. When left exposed to precipitation, positive slope and adequate drainage is required. The effects of weathering may vary based upon local climate and project conditions. May be used as temporary protection at the discretion of the general contractor or building professional. Maximum exposure is 6 months prior to coverage.

CAUTION: Release liners are slippery. To prevent injury, liner should be removed from under foot as soon as membrane is installed and disposed of properly.

CAUTION: Release liners are slippery. To prevent injury, liner should be removed from under foot as soon as membrane is installed and disposed of properly