[Jim K[_2_]]

On 21 Sep, 10:36, David W E Roberts
wrote:
On Linux at the moment - so different news server.

I have finally filled all the gaps around the doors and windows with
expanding PU foam and now need to finish off.

It is easy(ish) to cut the foam back to flush with the frames but much
more difficult to create a (say) 2mm rebate for flexible filler or (in
the case of some of the larger gaps around the door frames (blush) to
point up with mortar.

piece of wood with "a few" nails through the end, protruding as far as
you want the rebate deep.
cut cured foam flush to frames (I find it simplest with a wide chisel
or 1inch filling knife) then abrade with your "scratching stick" to
make the rebate?

Jim K