First timer here. I am not a builder, just someone trying to do as much as I can diy-wise as I have limited budget.
I am in the middle of converting my detached, double-skin (no cavity) garage into an office/cave. It currently has a concrete floor (5.5m x 3.3m) and I'm not sure of the best way to build and insulate my subfloor. I've searched around a bit and cannot find any information on how best to tackle this. One friend, who is more experienced at diy than me, suggested the following layers:
- DPM on concrete floor - Treated batons - Treated 3x2 joists at right angles to above, with Celotex/kingspan in between - Chipboard or OSB - Final finish, possible some kind of vinyl or linoleum, ie something that can take a bit of bashing but is easy to clean. Other budget-friendly suggestions welcome!
Does the above seem ok? Would there be adequate ventilation, if any? Or is this not an issue? Is there a better alternative?
Lay 75mm cellotex directly onto DPM. Leave no voids. Lay Tongue and grooved chipboard on top of Cellotex glueing joints as you go. Then coat the chipboard with 3 coats of SBR diluted 50/50 with water. Let it dry and you can la any type of floor finish you like except tiles
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