expanding foam around double glazing doors and windows

[wazza2006]

thinking of having double glazing windows and doors fitted. is it normal practice to use expanding foam on all windows or use it where it is required? i have been told they will only use it if the gap is a bit large or brickwork is not sound

 

[Softus]

Odd question, but the answer is "where required".

Normally, people worry about the cosmetic choice, and the cost, rather than the use of expanding foam