August 26, 2024
Property | Test Method | 2022 Standard (14 Tests) |
Air Permeance | ASTM E2178 | |
Apparent Core Density | ASTM D1622 | |
Compressive Strength | ASTM D1621 | |
Dimensional Stability at 28 days | ASTM D2126 | |
Fungi Resistance | ASTM C1338 | |
Gap Bridging - Declare gap width and temperature tested | ABAA 0004 | |
Open Cell Content, Volume | ASTM D6226 | |
Pull Adhesion | ABAA 0002 | |
Surface Burning Characteristics | ASTM E84 | |
Tensile Strength | ASTM D1623 | |
Thermal Resistance for a 25-mm thick specimen | ASTM C518 | |
Water Absorption by Volume | ASTM D2842 | |
Water Resistance with a 55-cm head of water | AATCC 127 | |
Water Vapor Transmission Rate for a 50-mm thick specimen - water and desiccant method | ASTM E96 |
Conventional Reroof Practices
A typical low slope roof consists of a roof covering, insulation layer, and structural deck leading to trapped moisture within the roof assembly. | Conventional roofing practices call for the removal of the entire roof assembly which leads to disruptions for occupants and increased overall cost. |
Reduce, Reuse, Renew
Reduce Capital Investment, Reuse Materials, Renew, and be Code Compliant
Tear off aged roof covering. | Install SlopeShield Plus SA allowing damp substrates to dry. | Work continues on reroofing with robust weather protection installed. Building remains occupied. | Install new insulation layer and roof covering. |
How SlopeShield Plus SA Dries Damp Substrates
Proving Substrate Drying: Case Study
SlopeShield Plus SA allowed the double plywood roof deck to dry out over a period of approx. 45 days. The closed cell foam acted as a vapor barrier, negating any downward drying. Only upward moisture movement through SlopeShield Plus SA could take place. |
The Results
Reducing Captial Investment |
Minimizing Occupant Disruption |
Challenge: Reroof, reduce labor and capital investment, keep the terminal functional. Solution: SlopeShield Plus SA allowed:
These benefits reduced overall project costs for owners and contractors. |
Challenge: Reroof overburdened vegetative green roof without displacing condo residents on two stories. Solution: SlopeShield Plus SA allowed:
Owners saved valuable HOA monies for additional improvement projects. |
Code Compliance and Energy Efficiency
Meeting/Exceeding Standards: VaproShield products are meticulously engineered to meet and exceed the standards set forth in IECC and IBC. Our high-quality air barrier and permeable vapor retarder membranes safeguard compliance with these codes, guaranteeing the highest quality and adherence to the regulations. | Energy Efficiency: As a code compliant air barrier, SlopeShield Plus SA enhances energy efficiency in the roofing system by minimizing heat transfer and reducing reliance on the HVAC system, significantly contributing to energy savings for the life of the building. |
Continue the Conversation with Us
We invite you to continue the conversation about self-drying technology with the VaproShield team
Project Case Study: Three Story Condo | Portland, OR
Three Story Condo | Portland, OR
In Portland, Oregon, this concept was proven, using SlopeShield Plus SA air barrier and permeable vapor retarder with Self-Drying Technology, in an attempt to dry a wetted plywood substrate. Thereby salvaging the existing substrate materials, including the spray polyurethane foam, interior gypsum ceiling.
Existing Roofing Assembly
The Issue |
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Residents experienced interior water intrusion as a result of leakage through membrane laps and punctures, plus improperly sealed penetration flashings. | Membrane removal exposed wet coverboard, insulation, and plywood substrate materials. | The initial moisture meter readings, in the top plywood layer, indicated a moisture content exceeding 40%. |
The Problem
The Solution: SlopeShield Plus SASlopeShield Plus SA allowed the double plywood roof deck to dry out over a period of approx. 45 days. Using a Delmhorst BD-2100 moisture meter, measurements taken at regular intervals, documented downward moisture levels in the decking material. The closed cell foam acted as a vapor barrier, negating any downward drying. Only upward moisture movement through SlopeShield SA Plus could take place. |
Remediating leaks through rooftop amenity spaces is an expensive process that requires total removal of the overburdened roofing, membrane, and saturated materials, including coverboard, insulation, roof deck, cavity insulation, and interior ceiling. This work is costly (high disposal fees, complete material replacement) and results in temporary resident displacement and revenue loss for the property owner.
Remedy and Findings
The existing materials were removed down to the plywood. The entire deck was covered in SlopeShield Plus SA, allowing the damp substrates to dry through upward moisture vapor diffusion.
The Results: Minimal Impact to Occupants and a New Roof
With a target moisture content at or below 15% it was determined the materials could be reused and the subsequent new roofing components (see above) could be installed.