Tag: closed cell foam insulation

Polyisocynaurate insulation is one of the more commonly used insulation types in the roofing industry. Most manufacturers of polyisocyanurate insulation use the long-term thermal resistance (LTTR) method of determination. LTTR method is defined by ASTM…

Polyisocynaurate insulation is one of the more commonly used insulation types in the roofing industry. Most manufacturers of polyisocyanurate insulation use the long-term thermal resistance (LTTR) method of determination. LTTR method is defined by ASTM…