Filled gap between wall and window frame with foam

[TimB100]

So had UPVC windows fitted. Looked ok until a year or two later and discovered the b*stard had just put a bit of UPVC cladding over a big gap between the opening and the window. Loads of mastic filler went unnoticed as out of view behind a wardrobe.

It was drafty and wanted to fill the gap. A couple of cans of foam later started to worry. 3 days later it was still oozing out of even the smallest gap.
Recently I was doing a loft conversion and noticed a great big bulge of foam in the roof space. It had found its way every where!

[wine~o]

Congratulations... you have now successfully installed cavity wall insulation....

Seriously that expanding foam does expand far more than you might expect.

A case of less is more...