Doctor Drivel wrote:

"robert" wrote in message
news

We are about to start work on renovating our kitchen.

On outside walls strip off plaster and install foam insulation against
the brick. Kingspan and Celotex do this with some refinished plaster.


Why strip the plaster?
Why not attach the kingspan to the exisitng plaster,
then put the vapour barrier on the inside of the kingspan?

Isnt plaster permeable?

Or would condensation occur there?

Is the removal of the plaster just to gain an inch of space?