VELUX vapor barrier apron Suitable for all roof structures that have an airtight layer and vapor barrier on the roof. The vapor barrier apron prevents both condensate damage in the insulation area of the roof structure and heat loss through leaks in the building envelope in the window area.

Air and vapor-tight connection to the airtight layer and vapor barrier on the roof, including adhesive tape

Permanent airtightness.

Protection against condensate damage in the roof.

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