garage conversion, flooring insulation

[davesturgess]

I am doing a garage conversion and have a depth of 200mm to bring it up to the same level as the existing house. I want to put in a floating chipboard floor. The easiest and cheapest way, with the highest insulation value, would seem to be fill the space up with polystyrene/Celotex sheets. Is this depth of polystyrene between the existing concrete floor and chipboard likely to settle at all? I know it works ok with at least 50mm but what about 175mm with chipboard on top? Anyone done this? Dave S

 

[noseall]

Why floating chipboard?

In my estimation, the simplest and cheapest way is to fit 125mm of jablite polystyrene insulation with a 75mm screed on top.

 

[amurphy1]

Hi Dave. We've just converted our garage too and done a kitchen extension so we had a similar issue with our flooring.

I'm not overly technical to be perfectly honest so I went to our our local Build Center up the road from us because their more trade than DIY and thought they might have abit more of a clue about what I need. They were really good to be honest, we got everything we needed for the complete job and the prices were really reasonable - if you go in and tell them exactly what your trying to do with it, they'll tell you what you need and will give you a price there and then.

I use the Wolverhampton branch but they've got branches all over i think. Not sure where you're based but you can find your nearest one on the Internet

Hope this helps you Dave!

 

[jeds]

I've used 170mm jablite in eaxactly the same siuation and it's still perfect after 10 years with no settlement.