Introduction to Permeable Vapor Retarders

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Issue: Moisture Intrusion in the Roof Assembly

Relying on Staggered ISO as an Air Barrier Causes Moisture Intrusion

The infrared image clearly shows moisture build-up beneath the roof membrane and within the roofing assembly.	When staggered ISO or the roof membrane is used as an air barrier, moisture-laden air from the interior spaces will penetrate the roofing assembly, resulting in performance issues and water damage.

Quick Building Science Basic

When Air Moves So Does Moisture

Water piggybacks on air - when air moves, so does moisture. Air movement accounts for 70-90 percent of moisture vapor transport, making it the primary driver of moisture movement.	95% more water vapor is transported by air flow.

Solution: Moisture Control Membrane

This infrared image shows a properly designed and installed moisture control strategy for the roofing assembly.	Implementing Slopeshield Plus SA during the design phase, as a moisture control layer, blocks air and reduces moisture infiltration up to ~90%, enhancing roof resiliency and integrity.

The SlopeShield Plus SA Difference

Moisture Protection Beyond the Surface

SlopeShield Plus SA functions as a continuous air barrier and permeable vapor retarder membrane: Reducing 90% of air and moisture infiltration Safeguarding from prolonged moisture-related damage Enhancing building health and energy efficiency

Learn More About SlopeShield Plus SA for Your Application

Specify SlopeShield Plus SA in DIV 07 as Your Preferred Code-Compliant Continuous Air Barrier