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Roof Barrier Offers DTM Application

Thursday, March 27, 2014

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Carlisle SynTec Systems has introduce VapAir Seal MD, an air and vapor barrier for direct-to-metal-deck applications.

The longtime manufacturer of single-ply membrane roofing systems notes that air and vapor barriers have become a more common component of roofing systems, with their ability to improve thermal efficiency and reduce moisture movement.

Carlisle calls VapAir Seal MD "the first self-adhered air and vapor barrier that is FM approved."

VapAir Seal
Carlisle SynTec

The VapAir Seal MD air and vapor barrier is designed to protect the permanent roofing system from moisture penetration by humid interior environments.

The product, which complies with FM Approval Standard Class No. 4470, is one of few direct-to-metal-deck air and vapor barriers that meet fire code approvals, the company says.

Features, Applications

The barrier is designed to both stop vapor drive and prevent air from moving moisture into the roofing system. According to Carlisle SynTec, it can be easily seamed and used to flash penetrations, creating a complete air and vapor seal.

The product is recommended for protection of roofing systems in environments with extreme internal humidity, such as wet industrial processes, breweries, swimming pools, sports halls, kitchens and bathrooms.

VapAir Seal MD consists of a reinforced, tear-resistant composite aluminum foil with a self-adhesive SBS backing and removable poly release film. It is recommended for applications over metal decks when the insulation or roofing substrate is mechanically fastened.

VapAir Seal MD is not meant for use as a temporary roof; the permanent roofing system should be installed the same day, the manufacturer reports.

More information:


Tagged categories: Air barriers; Building Envelope; Humidity and moisture; Moisture management; Roofing materials; Waterproofing membranes

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