Strength

Tensile Strength

ASTM D828 Standard Test Methods for Vulcanized Rubber and Thermoplastic Elastomers—Tension

Machine Direction:
2.7 N/mm (15 lbf/inch)
Cross Direction:
1.9 N/mm (11 lbf/inch)

Pliability

CAN/CGSB 51.33 M89 Vapour Barrier Sheet, Excluding Polyethylene, for Use in Building Construction

No Cracks

Water Vapor Transmittance

Water Vapor Transmission Desiccant Method Procedure A

ASTM E96 Standard Test Methods for Gravimetric Determination of Water Vapor Transmission Rate of Materials

Before Aging:
0.355 Perm (grain/h•ft²•inchHg) 20 ng/Pa•s•m²
(23°C 0-50 %RH)
After aging:
0.438 Perm (grain/h•ft²•inchHg) 25 ng/Pa•s•m²
(23°C 0-50 %RH)

Air Resistance Testing

Air Permeance

ASTM E2178 Standard Test Method for Determining Air Leakage Rate and Calculation of Air Permeance of Building Materials

0.0017 L/s•m² @ 75 Pa (0.000335 cfm/ft² @ 1.57 psf)

Water Resistance Testing

Water Resistance

AATCC 127 Hydrostatic pressure test (55 cm water column for 5 hours), American Association of Textile Chemists and Colorists

No leakage

VaproShield
Sausage Gun
Part No. 60159800

Wood Stud Framing

• DO use VaproShield approved products for this system
• DO determine horizontal or vertical installation
• DO ensure you have the required overlaps both horizontally and vertically
• DO install membrane printed side facing the interior
• DO use only recommended attachment methods
• DO inspect all seams, overlaps, edges and penetrations for complete
  sealing and adhesion to optimize product performance

• DON’T install over nails and other protrusions
• DON’T store in direct sunlight or over 120°F (-49°C)
• DON’T use alternative attachment methods, other than outlined in installation instructions.
• DON’T install printed side facing outward

Step 2: Workspace Preparation
2A. Ensure the wall/ceiling substrate is smooth and structurally sound.

2B. Remove nails, splinters, protrusions, dust, grease, and debris.

Verify the workspace is clean and all required installation tools are available.

Step 4: Measure and Cut Membrane
4A. Cut the membrane to span the full length of the wall plus min. 6” (15.2 cm) extra on each end for overlaps and sealing.
4B. Ensure minimum 1” (2.5 cm) excess at floor and ceiling for sealing.
4C. Install the printed side facing the interior of the building.

Keep sheets flat and tension-free—do not excessively stretch the membrane.

5. Attachment
VaproSmart can be attached to either wood studs or metal framing.
Review Steps 5.1 and/or 5.2 for best practice installation.

Step 5.1: Wood Frame Attachment
Using a staple gun and corrosion-resistant staples fasten the starting edge of the membrane to the studs.

5.1A Fastener spacing: 12–16” (31-41 cm) on center, ideally within overlap areas.

Align the membrane with framing and maintain smooth, wrinkle-free placement.

Step 5.2: Metal Framing Attachment

Secure VaproSmart to metal framing using one of the following methods:

• VaproAirSeal or specified non-curing acoustic sealant
• Specified Double-sided construction tape
• Specified Spray adhesive

Press the membrane firmly onto the framing to ensure continuous, smooth contact with the frame surface. Hand pressure is acceptable when using approved attachment methods; however, pressure rolling is recommended when practical to promote consistent adhesion. Align the membrane with framing and maintain smooth, wrinkle-free placement.

Step 6: Overlaps and Seam Taping

6A. Overlap adjoining sheets by a min. of 3” (7.6 cm) on horizontal and/or vertical seams.

• Before taping, ensure the overlap area is clean.
• Apply VaproFlashing SA or approved sheathing tape centered over the seam, press firmly to ensure adhesion.
• Avoid wrinkles or “fishmouths” in taped areas.

6B. Seal base overlap with VaproAirSeal or specified non-curing acoustic sealant. Press firmly to ensure adhesion.

Step 7: Final Inspection
7A. Inspect all seams, overlaps, edges, and penetrations for complete sealing and adhesion.

Repair any gaps, punctures, or unsealed areas using membrane patches and tape.

Optional: perform air leakage testing to verify air barrier continuity prior to drywall installation.

Lightweight concrete roof preparation

Minimum 5-day cure time, prime within two days, apply SlopeShield Plus SA on day 6 or thereafter

Apply SlopeShield Plus SA to partially cured concrete, interior trades can begin

Applying SlopeShield Plus SA on day-6 of the cure process:

• Allows interior trades to begin work safely and sooner
• Eliminates curing calendar resets to avoid costly project delays
• Prevents weather-related rewetting and enables early dry-in

Damp concrete is exposed

Apply SlopeShield Plus SA to high moisture content concrete

Concurrent drying and protection maintains project momentum

Walmart Headquarters

Bentonville, Arkansas
Over 1,000,000 sq.ft. of VaproShield’s self-adhered roof and wall air barrier membranes were installed across Walmart’s 12-building mass timber office campus over 24 months. SlopeShield Plus SA, installed on the roof decks, delivered mass timber protection for construction crews and machinery—all while simultaneously drying the mass timber through moisture vapor diffusion.

Amazon DII5 Delivery Station

Elkhart, Indiana
The large-scale 171,000 sq.ft. high-tech delivery station opted for the trusted mass timber protection solution from VaproShield. PanelShield SA, applied in the factory to large format panels, doubled as robust protection during transport and construction and mitigated moisture damage during installation and throughout the life of the building.

Hi-Tech Campus

Redmond, Washington
Built in the rainy Pacific Northwest, over 50,000 sq.ft. of SlopeShield Plus SA roofing membrane protects the mass timber decking on one of the newest buildings on the Microsoft campus. Durable under heavy traffic and resistant to ponding water, it provided slip-resistant traction for crews while allowing the structure to dry and breathe, delivering permanent, vapor permeable moisture protection.