The insulation behind the bathtub or shower shall be equivalent to the insulation on the rest of the outer walls and shall be covered with an air barrier fitted with a concrete support panel, rigid foam insulation or a dry wall without paper faces sealed on the edges and seams to ensure continuous air closure.

For the interior walls of your bedroom and bathroom, you must obtain acoustic insulation to comply with the Building Regulation. As they are likely to be wooden partitions, they must be insulated or give additional linings.

The insulation behind the bathtub or shower shall be equivalent to the insulation in the rest of the outer walls and shall be covered with a cement support board air barrier, rigid foam insulation or dry paper faceless wall that is sealed at the edges and seams to provide a continuous air seal.

The insulation behind the bathtub or shower shall be equivalent to the insulation on the rest of the external wall and shall be covered by an air barrier from the cement support plate, by a rigid foam insulation or by a dry wall, without paper faces sealed on the edges and cushions to provide a continuous air seal.

The insulation behind the bathtub or shower shall be equivalent to the insulation on the rest of the outer wall and shall be covered with an air barrier from the concrete base plate, rigid foam insulation or dry paper faceless walls that are sealed on the edges and seams to ensure continuous air closure.