SpecTips - Minimizing Air and Possible Moisture Infiltration into the Roof System
Reducing penetrations through your metal roof deck
Metal decks are one of the most commonly used roof decks in the United States. The roof deck is an important part of every building,as it represents the top side of the building envelope. A building may have three or more roofs during its existence, butthe roof deck normally remains the same. In addition to the aesthetic issues pictured above,where the current fasteners and previous fastener holes are visible, thermal performance issues will occur. The picture below shows heat loss where escaped conditioned air is drying the dew at each plate/fastener assembly.
Utilize Carlisle’s SecurShield™HD Composite polyiso roof board. This product has an industry-leading FM 1-90 fastening approval with just 6 fasteners per 4’x8’ board in adhered membrane systems. This is a true differentiator, as heavy cover boards such as 5/8” gypsum and 7/16” OSB require 8 or more fasteners for the same approval. Remember, using fewer fasteners reduces thermal loss and labor hours.
3-Part Specification
Metal decks are one of the most commonly used roof decks in the United States. The roof deck is an important part of every building,as it represents the top side of the building envelope. A building may have three or more roofs during its existence, butthe roof deck normally remains the same. In addition to the aesthetic issues pictured above,where the current fasteners and previous fastener holes are visible, thermal performance issues will occur. The picture below shows heat loss where escaped conditioned air is drying the dew at each plate/fastener assembly.
Utilize Carlisle’s SecurShield™HD Composite polyiso roof board. This product has an industry-leading FM 1-90 fastening approval with just 6 fasteners per 4’x8’ board in adhered membrane systems. This is a true differentiator, as heavy cover boards such as 5/8” gypsum and 7/16” OSB require 8 or more fasteners for the same approval. Remember, using fewer fasteners reduces thermal loss and labor hours.
3-Part Specification
- The roof must have a cover board that conforms to ASTM C1289 Type II, Class IV.
- The cover board shall require 6 fasteners or less per 4’x8’ board to achieve an FM 1-90.
- The top layer of insulation shall be a composite product that is two products in one: Carlisle’s SecurShield HD Composite polyiso.
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