Which Jablite thickness?

[swissbob]

We are going to convert our garage into a lounge and I can't work out what thickness of Jabfloor 70 we need underneath the chipboard. I planned on going for 100mm, but is this overkill?

I tried looking at the P/A chart on the Jablite site, but it doesn't seem to make any sense to me. The room is roughly 15 feet by 15 feet.

The garage is dry, with a concrete floor and plenty of height. We currently step down into it and would like to keep the ceiling as high as possible.

Am I right in thinking that I need the Jabfloor to fit snugly against the walls, but leave a 10mm gap around the edge of the chipboard?

Should I use a DPM below the Jabfloor even though there isn't any damp in the garage?

Also, is there any reason I couldn't put a layer of 50mm on top of another layer of 50mm, laid in the opposite direction?

Thanks.

 

[noseall]

kingspan do an insulated floor deck that requires no dpm.

it is a laminate of insulation bonded to chipboard. it is called thermafloor.

it is available in varying thicknesses and can be laid as a 'floating' floor, direct to existing concrete.

the only stumbling block is whether or not your garage floor slopes towards the garage door, as many garage floors do.

 

[swissbob]

kingspan do an insulated floor deck that requires no dpm.

Interesting. Here is a link if anyone is interested:
http://www.noisestopsystems.co.uk/products/kingspan/therma/thermafloor_tf73/index.asp

It is called Thermafloor TF73

Do you know if this is more expensive than using the separate parts? I can't find a single price on the web without requesting a quote.

the only stumbling block is whether or not your garage floor slopes towards the garage door, as many garage floors do.

I got the spirit level out, and there might be a tiny gradient. Is that something to worry about? I could use some floor levelling stuff, but I have never tried it before.