Tag: roof

“Potholes” in a Mod-Bit Roof Membrane—Lichen Attack

January 03, 2020

By Harvey Freeman, MNSAA, MRAIC Introduction 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 […]

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Roof Decks A to Z; Part XII: Board Sheathing

February 01, 2019

By L.D. Hogan, RRC, FRCI, PE Abstract This is the twelfth in a series of articles examining various deck types. Of the numerous considerations necessary when selecting a roof system, the type of decking is among the most important. With the variety of decks to be encountered (both new and old), it is incumbent upon […]

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