Further Information
A foil Vapour Control Layer is a vital part of a well-built sauna because it helps prevent hot, moisture-laden air from passing into the wall and ceiling structure, where it could cause condensation, mould, timber decay, and loss of insulation performance. Positioned behind the internal lining, the foil layer acts as both a vapour barrier and a radiant heat reflector, helping the sauna heat up more efficiently while protecting the fabric of the building from long-term moisture damage. In a high-temperature, high-humidity environment such as a sauna, this layer is not just a useful addition but a key element in ensuring durability, energy efficiency, and reliable performance over time.