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I have a late 1980s single storey brick veneer home built on a concrete slab. I have a sunken room floor measuring 5m x 4.44m x .172m and I'm interested in raising the floor to be flush with the neighbouring rooms. Change in elevation is 172mm.
Stud framing and drywalls sit on the sunken room floor, and one of the walls are along one of the external walls of the home.
I'm interested in raising the floor with timber framing and placing insulation between the sleepers to muffle any hollow sounds when walking on top. I eventually plan to install hybrid floorboards on top. My questions are:
1. What type of pressure treated sleepers should I be using (e.g. H4) and dimensions?
2. Do I need a vapour barrier? If so, should I use a continuous vapour barrier and what type?
3. What type of insulation should I use (e.g. Rock wool)?
4. What type of subfloor should I add on top and thickness? I'm thinking structural ply.
Not sure if there are any other important questions I should ask or things to consider. But happy for commenters to expand on what I've asked as any input would be greatly appreciated, and a good learning experience for me.
