Our reduced enlargement foam is developed specifically for window and door installations. It expands to fill voids that fibreglass batt insulation may not properly reach. Not like fibreglass, foam acts a vapour barrier that seals openings/gaps and cut down leakage. Stuffed into gaps, compressed fibreglass insulation loses its insulating value. https://elliotwywxw.wizzardsblog.com/32132362/not-known-factual-statements-about-exterior-doors-steel-in-scarborough-ontario