whilee21
2020-03-31 12:12:52
- #1
Hello,
I am new here and appreciate expert help.
About my project: I want to build a soundproof cabin for making music in a former basement pool.
I have an apartment on a slight slope. It has two floors, ground floor and basement with garden exit. We have just completely gutted the basement. Part of it is also a former pool with a base area of 4x8m and is one meter lower than the house’s floor slab. I divided this area with a calcium silicate brick wall and pared down one room. The exterior walls are in the ground, so there are no windows. The ceiling height is 3.6m. See sketch in the attachment.
Now I want to build a soundproof cabin in this room to make music. It will be a wooden frame construction made of 6x12cm solid construction timber, simply clad on the outside and double-clad on the inside. The ceiling likewise. The walls and floor will be acoustically decoupled from the screed by Sylomer. There will be an air gap of about 10cm between the exterior walls and the cabin.
Now I want to start with the floor construction and am worried about moisture. As mentioned, the pool is one meter below the house’s floor slab. Around the house there is a new drainage system. But the pool’s floor slab lies below the drainage. The pool has been gutted and completely dry for about 6 months. I am really glad about that. But I worry that if I build the second room there now, the "normal" moisture cannot escape and could cause mold on the exterior walls as well as damage the cabin’s shell.
Question: how can I ensure that the exterior walls and floor stay dry?
Idea: I would do nothing to the walls and try to keep the air moving in the narrow gap between the exterior wall and the cabin with one or two fans – to let the walls breathe.
I planned the floor construction as follows:
Moisture barrier, 5 cm insulation, screed separation, 5 cm flowable screed.
The question: what kind of moisture barrier would you recommend? Is it a coating with slurry, bitumen sheets, or simply construction foil? And would you also seal the walls (about 1m) below the drainage? And with what?
Costs are of course an issue; otherwise, I wouldn’t want to do all this myself... So is there an effective, inexpensive way?
Many thanks for your advice.
W.
I am new here and appreciate expert help.
About my project: I want to build a soundproof cabin for making music in a former basement pool.
I have an apartment on a slight slope. It has two floors, ground floor and basement with garden exit. We have just completely gutted the basement. Part of it is also a former pool with a base area of 4x8m and is one meter lower than the house’s floor slab. I divided this area with a calcium silicate brick wall and pared down one room. The exterior walls are in the ground, so there are no windows. The ceiling height is 3.6m. See sketch in the attachment.
Now I want to build a soundproof cabin in this room to make music. It will be a wooden frame construction made of 6x12cm solid construction timber, simply clad on the outside and double-clad on the inside. The ceiling likewise. The walls and floor will be acoustically decoupled from the screed by Sylomer. There will be an air gap of about 10cm between the exterior walls and the cabin.
Now I want to start with the floor construction and am worried about moisture. As mentioned, the pool is one meter below the house’s floor slab. Around the house there is a new drainage system. But the pool’s floor slab lies below the drainage. The pool has been gutted and completely dry for about 6 months. I am really glad about that. But I worry that if I build the second room there now, the "normal" moisture cannot escape and could cause mold on the exterior walls as well as damage the cabin’s shell.
Question: how can I ensure that the exterior walls and floor stay dry?
Idea: I would do nothing to the walls and try to keep the air moving in the narrow gap between the exterior wall and the cabin with one or two fans – to let the walls breathe.
I planned the floor construction as follows:
Moisture barrier, 5 cm insulation, screed separation, 5 cm flowable screed.
The question: what kind of moisture barrier would you recommend? Is it a coating with slurry, bitumen sheets, or simply construction foil? And would you also seal the walls (about 1m) below the drainage? And with what?
Costs are of course an issue; otherwise, I wouldn’t want to do all this myself... So is there an effective, inexpensive way?
Many thanks for your advice.
W.