We have our house framed and the windows are framed in.  We want to use insulating foam to fill in the gaps (our house is freezing and we need contractors to work through the winter).  We want to use the specific foam for windows (expanding until contact) and then fast expanding foam to fill in gaps in block or wood.  We live in Toronto, Canada and the temperatures are now below freezing.  Does anyone know if we can use this foam in this weather?  Some tubes say to use in temps above 41 degrees farenheit (5 degrees celcius) But others don’t.  Also, if you know of brands that are better than others, that would also be appreciated. Thanks!