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Title
Polyiso Foam Insulation
Polyiso Foam Insulation
Date
1/2020
1/2020
Author(s)
Thomas Taylor
Thomas Taylor
Page(s)
10-18
10-18
Source
IIBEC Interface
IIBEC Interface
Keyword(s)
foam; insulation; thermal; resistance; R-value; radiation; conduction; convection
foam; insulation; thermal; resistance; R-value; radiation; conduction; convection
Abstract
Thermal insulation is an important part of commercial roofing assemblies, with polyisocyanurate foam, or polyiso, being the most common form today. As energy costs have risen, understanding the exact insulation value of this material (i.e., its thermal resistance or R-value) has become more important. Knowledge of thermal resistance can be used to specify heating, ventilation, and air conditioning (HVAC) equipment and to predict long-term energy use. The polyiso polymer represents less than 5% of the total insulation volume, with cell gas representing greater than 95%. Therefore, thermal conductivity of polyiso's cell gas is the critical factor determining R-value.
Thermal insulation is an important part of commercial roofing assemblies, with polyisocyanurate foam, or polyiso, being the most common form today. As energy costs have risen, understanding the exact insulation value of this material (i.e., its thermal resistance or R-value) has become more important. Knowledge of thermal resistance can be used to specify heating, ventilation, and air conditioning (HVAC) equipment and to predict long-term energy use. The polyiso polymer represents less than 5% of the total insulation volume, with cell gas representing greater than 95%. Therefore, thermal conductivity of polyiso's cell gas is the critical factor determining R-value.