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Is Plastic Sheeting Also Called,"Vapor Diffusion Retarders"?

Posted by Nana Hinsley on Tue, Jul 09, 2013 @ 03:29

The question has been posed whether plastic sheeting is used as a vapor diffusion retarder (VDR). ABSOLUTELY!  There are different types of vapor diffusion retarders- but plastic sheeting is one of the primary ways in which to control the moisture content coming into your home or building.  A vapor diffusion retarder is a material that reduces the rate in which water vapor can move through a material such as a plastic sheeting liner or vapor barrier. The ability of a material to retard the diffusion of water vapor is measured in units referred to as "perms. Vapor barriers are also measured in terms of its "permeability". Any material with a perm rating of less than 1.0 is considered a vapor diffusion retarder, or a plastic sheeting vapor barrier.

Vapor Diffusion Retarder

Some plastic sheeting is more effective as a vapor diffusion retarder. That is because it is engineered to specifically retard the flow of water. Additionally these plastic sheeting liners are tested to the ASTM E1745 standard.

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Tags: vapor diffusion retarders