Expansion foam or builders bog

ang_ck, Feb 10, 10:36am
If you have some rotten timber on the window frame that cannot be replaced, ), What would you do to fill up the rotten cavity (2cm deep, 1 cm wide and 3m cm long)!

I usually fill the inside with foam and the other layer with builder's bog. What would you do! A friend of mine recommends that I fill it up with sealant.

twink19, Feb 10, 10:43am
clean all the rot out, then fill it with builders bog, sand and paint, not sealant

ae64, Feb 10, 2:56pm
Bog - the problem with many foams is that they can continue to grow

t_naki, Feb 10, 3:08pm
There isstuff that you paint on to stop the rot which you need to do before you fill the hole or else the rot will continue to eat away from the inside.

trade4us2, Feb 10, 3:14pm
Green Metalex kills rot pretty well, but dig out all the rotten bit first.
If it's the frame, why not chop out a rectangular piece and put some H3 timber in there, and fix it for good. That's a chance to use the Renovator saw!

ang_ck, Feb 10, 3:41pm
thanks for replying. dug out the rot and put in the bog.

singing1, Mar 1, 1:02pm
Dig out the rotten timber with a very sharp chisel and replace it with wood, glued in.its the only way to go.