Ian Stirling wrote in message ...
I have 12mm un-foil-backed plasterboard over a 2" gap, to a 50cm stone wall.
It's a mite chilly, and I'd like to insulate it a bit.

I'd then like to drill holes between all the studwork, and simply blow
foam into the wall before replacing the plugs, making good, and putting
the foil on top.

Is there any means of DIYing the foam injection?
Other than buying several dozen bean-bags, and a funnel

Or waste expanded polystyrene packaging crushed up. Drop notes round
your neighbours and you'll have stacks of the stuff in no time.

Blowing it in is only a way to get quantity in faster, any hose blower
plus bean reservoir should function. But if your hole's 4" wide
instead of 2" theres really no need to blow, just pour.

NT