How do I fix to a wall treated with waterproof material?
There are ‘ideals’ for how this should be tackled: 1) Cementitious tanking—a recess should be formed where the fixings will be and the tanking taken into the recess prior to render being applied. You can (carefully) drill into the render, taking care not to puncture the tanking system. 2) Cavity drainage membrane—additional studding can be applied behind the plasterboard to receive fixings and take the extra weight. Both require forward planning, so if this is something that is going to be an issue it should be discussed at the initial meeting with the surveyor.
Dry rot and wet rot can affect buildings of all ages, and if decay is discovered it should be identified and remedial action should be taken without delay. Fungal decay occurs in timber which becomes wet for some time and is the result of the attack by one of a number of wood-destroying fungi.
It is very important that the type and cause of the fungal decay are correctly identified before any corrective action can be considered. It is for these reasons that it is important that a detailed diagnostic inspection is carried out by a competent specialist.