Our reduced enlargement foam is designed specifically for window and door installations. It expands to fill voids that fibreglass batt insulation may not efficiently achieve. Compared with fibreglass, foam acts a vapour barrier that seals openings/gaps and lower leakage. Stuffed into gaps, compressed fibreglass insulation loses its insulating worth. Performance: https://vinyl-windows-in-keswick85675.tribunablog.com/the-ultimate-guide-to-entry-doors-steel-in-keswick-ontario-46496485