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What is a vapour control layer?

In simple terms, this is a layer on the inner face of the building which is used to reduce moisture flow into and through the walls, roof or floor. This is to prevent damaging levels of condensation occurring in the fabric of the building which in turn would cause decay in timber, corrosion in metals or frost damage in masonry.

Vapour control layers differ from vapour barriers in that they are designed to slow the flow of moisture and not block it completely, the reason for which we explain below. Vapour control layers are also airtight and generally used as an airtight layer to make buildings airtight.

Size – 4m x 50m

Gauge – 500g

Grade – 125mu