Our low expansion foam is designed especially for window and door installations. It expands to fill voids that fibreglass batt insulation may not efficiently 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 price. https://cristianyabbd.bloggazzo.com/31312215/the-patio-doors-in-keswick-ontario-diaries