Roof Vapor Retarder

Everyone knows that water in roof systems is never a positive.

Roof vapor retarder.

This eliminates the need for a separate air barrier that could potentially prevent the moisture from escaping. Sopra vi is a bitumen coated base sheet for use in approved built up roof assemblies. A vapor retarder is commonly installed on the warm interior side of a roof or wall. It appears now when vapor retarders are needed more than ever the design community seems to have lost interest which is not good considering how codes and standards altered through concerns for energy savings have changed how buildings are designed constructed and operated.

The need for use and design of a vapor retarder in the design of a roof system used to be a hotly debated topic. Gaf sa vapor retarder is an sbs modified bitumen vapor retarder for use in approved gaf roof assemblies. The topside and underside are. In a low slope roof assembly the vapor retarder is normally installed under the primary roof insulation.

A vapor retarder is a material or system that is designed as part of the roof system to substantially reduce the movement of water vapor into the roof system where it can condense. Gaf sa vapor retarder is composed of a proprietary formulation of elastomeric styrene butadiene styrene sbs polymer modified bitumen in combination with a high tack self adhesive.