(Stephen Jones) wrote:

I have seen on the screwfix web site Airtec Double insulation which is
claimed to be equivalent to 55mm of polystrene. Has anybody any
experience of this product. I am thinking of using it under plaster
board for dry lining. I also found Foiltec which might me the same
stuff but cannot get hold of any technical information on either.


I had a look at the Airtec stuff a few months ago with a view to using
it instead of polystyrene for insulating a shed/workshop. The only
useful info I found for it was here

http://www.brecertification.co.uk/pdf/Cert060.pdf

Needless to say Screwfix dont do the plastic clips or foil tape
referred to in the document - I guess you could get foil tape
elsewhere & use battens for spacing - it appears to need to be
stretched between the studs in the middle of the void to ensure at
least a 25mm air gap in front of it & behind it.

I couldnt find anyone who'd actually used it & commented on it or
recommended it on Google or Google Groups so I decided not to risk it
in the end, particularly as it would have cost a bit more than the
polystyrene as I would have ended up with half a roll left over for my
application, and it looked like it would take just as long to fit as
the poly.

HTH
Richard