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DAFA DI Foil is a permeable vapour barrier used to prevent dry rot, mould and mildew, primarily in exterior walls and ceiling constructions. The vapour barrier allows periodic condensation moisture to move from one side of the material to the other, but is still tight enough to stop normal vapour pressure.
Use the Dafa DI Foil vapour barrier for thermal insulated building elements where there is a risk of summer condensation or other moisture on the external side of the vapour barrier. For example, well-insulated structures exposed to direct sun during the summer can achieve such a high difference in temperature between the outside and the inside that there is risk of condensation on the vapour barrier. This is a typical phenomenon in holiday homes that are empty for long periods. It is important that the foil’s text side faces the warm side of the structure (as shown on the pictures).
Dafa DI Foil consists of a polyethylene (PE) rolled product coated with moisture-absorbent polypropylene (PP) insulation. The material can tolerate direct sunlight for a maximum of three months and must not be exposed to direct contact with solvent-based wood preservatives.
A complete system
Dafa DI Foil is a part of DAFA Airstop System, and can be fitted in connection with DAFA accessories.
For further information contact our customer service.
Dafa DI Foil is CE-marked according to EU standard PN-EN 13984:2006/A1:2007
Dafa DI Foil is covered by a 25-year product guarantee from delivery.