Title
What we know now
What we know now
Date
3/2020
3/2020
Author(s)
Matt Dupuis
Matt Dupuis
Page(s)
34-39
34-39
Keyword(s)
concrete; roof; decks; asphalt; BUR; vapor; retarder
concrete; roof; decks; asphalt; BUR; vapor; retarder
Abstract
The roofing industry has been installing roofing materials over structural concrete roof decks for more than a century. For most of this time, hot-applied built-up roofing was the predominate roof system installed over concrete roof decks, and any insulation was almost always adhered in hot asphalt. Using an asphalt-based roof system provided a fairly robust roof system in terms of adhesion and watertight integrity; the mopped asphalt functioned as a relatively good vapor retarder. Because of the asphalt, BUR roofs resist moisture movement and typically remain adhered to the concrete even if moisture intrusion occurs.
The roofing industry has been installing roofing materials over structural concrete roof decks for more than a century. For most of this time, hot-applied built-up roofing was the predominate roof system installed over concrete roof decks, and any insulation was almost always adhered in hot asphalt. Using an asphalt-based roof system provided a fairly robust roof system in terms of adhesion and watertight integrity; the mopped asphalt functioned as a relatively good vapor retarder. Because of the asphalt, BUR roofs resist moisture movement and typically remain adhered to the concrete even if moisture intrusion occurs.