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Abstract
MOISTURE MANAGEMENT IN low-slope roof structures is a challenge for long-term integrity. When present, moisture within roof structures can reduce the functional properties of the insulation layer, increase the risk of mold proliferation that can cause premature decay of the structures, and shorten the lifespan of the roof itself. Moisture accumulation within the roof structure can result from various factors, including condensation due to temperature differences or shifts and unintended water ingress from leaks. Moisture can also enter the roof assembly through air leakage paths in the vapor barrier or other layers. In such cases, warm, humid indoor air moves by convection into cooler parts of the insulation, where the water vapor condenses. This process can lead to localized wetting deep within the insulation, even in the absence of a bulk water leak.
MOISTURE MANAGEMENT IN low-slope roof structures is a challenge for long-term integrity. When present, moisture within roof structures can reduce the functional properties of the insulation layer, increase the risk of mold proliferation that can cause premature decay of the structures, and shorten the lifespan of the roof itself. Moisture accumulation within the roof structure can result from various factors, including condensation due to temperature differences or shifts and unintended water ingress from leaks. Moisture can also enter the roof assembly through air leakage paths in the vapor barrier or other layers. In such cases, warm, humid indoor air moves by convection into cooler parts of the insulation, where the water vapor condenses. This process can lead to localized wetting deep within the insulation, even in the absence of a bulk water leak.
Date
7/2026
7/2026
Author(s)
Katarina Hellen
Katarina Hellen
Page(s)
14-16
14-16
Source
IIBEC Interface
IIBEC Interface
Keyword(s)
moisture; condensation; insulation; water
moisture; condensation; insulation; water