Loft insulation

Look at the performance. Celotex, Kingspan, etc do similar products. Check them all out.

On Thu, 06 Mar 2008 14:03:29 +0000, a particular chimpanzee, F randomly hit the keyboard and produced:

Its conductivity is 0.029W/mK, so is about 25-30% better than mineral wool (which is usually between 0.037-0.04). You would need two layers to give the same U-value as 170mm Rockwool. The 'better' in terms of insulation value material is PIR (Celotex, Kingspan, Xtratherm, et al), which has a k-value of 0.023W/mK, but is more expensive.

OTOH, anything is better than nothing, and if the choice is no extra insulation over the middle or this, I'd go with this.

Thanks.

I had a look at the Celotex and Kingspan sites yesterday and they seem to be designed to hide any information useful that might be useful to me. I emailed them both and Kingspan got back within 30 minutes; I'm still waiting for Celotex.

Thermafloor TF73 is the nearest I've seen to what might seem to be suitable but it's got 18mm of chipboard attached.

Kooltherm K7 would seem to be a possibility but I can't see anything in the literature to say that its mechanical strength would be adequate for loft storage.

In effect, I don't seem to be able to find the sheets of polystyrene which would be equivalent to Space Board (nor any Kingspan or Celotex prices).

On Sat, 08 Mar 2008 14:35:35 +0000, a particular chimpanzee, F randomly hit the keyboard and produced:

I don't think you need to worry on that score; they're all designed to go under concrete slabs and roof decks, and they all get walked over on site extensively before that. You may need to lay it on boards to prevent the ceiling joists digging in, and board over to distribute the loads.

Try Ebay, or email .