pdf PDF Download (4.77 MB)

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. View Entire Case Study

The Results

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

  pdf PDF Download (2.26 MB)

Three Story Condo | Portland, OR

Overburdened roofing, consisting of a combination of 4-5” of growing medium, roof top decks and railings.

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
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

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.

pdf PDF Download (1.89 MB)

OVERVIEW

VaproMat is designed to be installed over VaproShield membranes as a system to provide a positive drainage cavity behind claddings.

AIR BARRIER INSTALLATION

Air barrier installation requires all seams, joints, overlaps and penetrations WRB/AB membrane to be sealed for complete air barrier continuity.

BEST PRACTICES OVERVIEW

• Always install VaproMat, filter fabric side out, vertically with seams butted together, overlapping the 2” filter fabric selvage edge. Do not overlap the drainage matrix.
• Refer to membrane specific installation instructions for proper membrane installation.
• Building layout should be planned prior to installation to minimize waste and ensure all interfaces and penetrations are identified and correctly detailed to protect against water and air infiltration.
• Proper sequencing is critical. Protect rough openings and large penetrations with specified rough opening material.
• Maximum exposure prior to cladding installation is 6 months (180 days).
• Install lath and weep screeds “proud” or over the VaproMat material.