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Commercial Roofing Solutions from The Garland Company

Archive | July, 2012

Air Quality Impact of Airflow Leakage

Apart from the obvious means of ingress/egress (i.e. windows, doors, ducts), air flows through building materials by means of pressure differentials acting from the outside of the building inward and visa versa. The three sources of pressure differential are: Chimney effect (stack pressure) Wind pressure Fan pressure Chimney (or stack) effect occurs in all buildings, […]

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What are some facts you should know about hot applied coal tar?

What are some facts you should know about hot applied coal tar? These handling recommendations refer to roofing bitumen complying with the physical property requirements of the American Society for Testing Materials (ASTM) standard D 450 “Specification for Coal Tar Pitch Used in Roofing,Dampproofing, and Waterproofing” (Types I and III coal tar). The bitumen should […]

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