Our three (1 big, 2 small) upvc windows in the lounge don't seem to be secure in their fixing so if you give them a bit of a push the whole window has a bit of give and wobbles.
This has caused the sealant around the edge, particularly at the top, to crack. I have re-sealed to have a bit of warmth and keep noise out, but am sure it will crack again before too long.
I was thinking that I could fill the cracks with a tiny bit of expanding foam to both secure the window and then put fresh sealant around this edge to make it look nice. Would that fix the problem or are there any problems this could cause that I am not thinking about.