
Michael Tucker
Hello Sophie, Simply mix the adhesive up and stick the board on the wall, try to use a 8x4 board this will help you take out any unwanted perfections. I would strongly recommend using an 20mm insulated board if you can this will give you a better insulation value to the room. Your window reveals should have this regardless because that will be your weakest area. Given that it's a soiled wall you should consider putting batten on the walls, then filling between the battens with insulation this will stop the board from being in direct contact with Regards Michael