Can I use normal gypsum plaster board in a bathroom if i back it with a DPM?
If your going to use plaster board to line the walls to your bathroom, you will need to use what is known as foiled backed plasterboard. Foiled backed plaster board can either be nailed to battens or stuck to a brick or block wall previously plastered or not by using an adhesive. Although the adhesive sticks like sh!t. you Will need to apply mechanical fixings (approx 9 per board 3 at top 3 in middle and 3 at bottom) this is for fire protection (heat may affect the adhesive and the board might topple). Obviously if your nailing to battens you will need to nail at about 250mm intervals on to the battens. Insulate exterior walls with gyprock thermal plasterboard or similar not less than 25mm thick. Foiled backed plaster board will also help insulate.
