DAFA DiFoil is a vapor-permeable vapor diffusion retarder used to prevent rot, dry rot, and mold growth, primarily in exterior walls and ceiling structures.
DAFA DiFoil vapor retarder
It is used to prevent rot, dry rot, and mold growth, primarily in exterior walls and ceiling structures. The vapor diffusion retarder allows periodically occurring condensation to pass through the foil, while sealing enough to stop normal vapor pressure.
Use the vapor diffusion retarder for thermally insulated building elements where there is a risk of summer condensation or other moisture accumulation on the outer side of the vapor diffusion retarder. For example, well insulated structures exposed to direct sunlight during summer periods can result in such great inside/outside temperature differences that there is a risk of condensation on the vapor diffusion retarder. A common phenomenon in holiday homes left uninhabited for certain periods.
DAFA DiFoil vapor diffusion retarder consists of polyethylene (PE) material with a moisture-absorbing polypropylene (PP) fleece layer.
DAFA DiFoil vapor retarder is included in the Nordic Ecolabellings database of construction products that can be used in Swan-labelled buildings.
Part of the DAFA AirStop System
More construction-friendly than a standard PE foil
Allows periodically occurring condensation to migrate from one side to the other
Can be nailed, and has high tensile and tear strength