Our lower growth foam is made specifically for window and door installations. It expands to fill voids that fibreglass batt insulation may not effectively get to. Contrary to fibreglass, foam acts a vapour barrier that seals openings/gaps and reduce leakage. Stuffed into gaps, compressed fibreglass insulation loses its insulating benefit. https://steelexteriordoorinkeswic27159.techionblog.com/32181012/an-unbiased-view-of-replacement-entry-doors-in-keswick-ontario