So I think you're upset right? Wrong. But you will be if you use the wrong foam insulation around your windows and doors. All too often, peoplelook for the best value in "spray foam" to put around doors and windows, thinking that the maximum expansion foam is best.
Truth is, they would be wrong to think that.
There are a 3 general types of consumer expandable foam.
High expansion for Big gaps, large voids or areas where distortion is not a concern.
Medium expansion for cracks and smaller gaps where control of the sprayed material would be beneficial.
Low expansion is for doors and windows.
Now the low expansion part is not the only characteristic of this spray in insulation. The most important part, and the main reason it is so critical the the correct product be used is that, unlike its bigger filling counterparts which get hard when curred, low expansion does just the opposite. It remains flexible so that when the building structure moves seasonally, it does not exert any pressure against the door or window frame causing frame or glazing failure. Unfortunately, it is a common mistake which causes a lot of headache for many would-be DIYers.
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