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Title
"Potholes" in a Mod-Bit Roof Membrane
"Potholes" in a Mod-Bit Roof Membrane
Date
1/2020
1/2020
Author(s)
Harvey Freeman
Harvey Freeman
Page(s)
20-23
20-23
Source
IIBEC Interface
IIBEC Interface
Keyword(s)
potholes; mod-bit; granules; roof; lichen
potholes; mod-bit; granules; roof; lichen
Abstract
This article describes the interaction between a naturally occurring lichen and a modified-bituminous (mod-bit) roof membrane. I have not found this topic discussed by anyone in roofing literature. The growth of this lichen is very slow in relation to the expected life span of a mod-bit roof membrane. As a result, the roof will have reached the end of its useful life and been replaced or been coated or given a cap sheet re-cover before the lichen has advanced to the point of causing a membrane failure. The only routine maintenance that may be required would be patching potholes.
This article describes the interaction between a naturally occurring lichen and a modified-bituminous (mod-bit) roof membrane. I have not found this topic discussed by anyone in roofing literature. The growth of this lichen is very slow in relation to the expected life span of a mod-bit roof membrane. As a result, the roof will have reached the end of its useful life and been replaced or been coated or given a cap sheet re-cover before the lichen has advanced to the point of causing a membrane failure. The only routine maintenance that may be required would be patching potholes.