Viper VaporCheck 12 ft x 200 ft - All Thicknesses Thickness:10 mils And just like that

And just like that

large roof window

Lightweight and Durable Housing

When paired with the VELUX No Leak Skylight (models FCM

Viper VaporCheck 12 ft x 200 ft - All Thicknesses Thickness:10 mils And just like thatViper VaporCheck is a cross woven reinforced under slab vapor barrier specifically designed to prevent moisture migration through concrete slabs on grade. The high density cross woven reinforcing fibers are fused together using molten polyethylene, creating a high strength product with low water vapor permeability. Viper VaporCheck is ideal for demanding applications requiring the use of a heavy duty vapor barrier and exceeds all ASTM E 1745 Class A