Answer: when your parquet presents risks of humidity.
Polyane has the same effect on your parquet as a vapor barrier for your roof. It will therefore prevent moisture from inside your home from getting into your floor. The polyane film is a polyethylene roll to be placed under the insulation if the floor or the room presents risks of humidity. This technique is very useful to insulate the parquet of a bathroom, if a cellar is under your floor or if the tile is quite old. Sanding a parquet Our practical DIY videos