On Mar 7, 11:31 am, Huge wrote:
On 2008-03-06, Clot wrote:

I cannot answer the issue re acceptability of celotex.

Can anyone else? It had never occured to me to do this, and it would be a
million times easier than lifting the floorboards in the bedroom or tearing
down the garage ceiling.

You could try giving either your local building control a call, or
Celotex Ltd.