Internal Wall Insulation (IWI) is a method of insulating the wall where the insulation is added to the internal surface of the wall. This is typically a thin layer of insulation finished internally with a wet plaster coat.
Internal Wall Insulation (IWI) is a method of insulating the wall where the insulation is added to the internal surface of the wall. This is typically a thin layer of insulation finished internally with a wet plaster coat.