To obtain a copy of a specific publication, users should contact the publication's publisher directly.
Title
A Prototype Roof Deck Designed to Self-regulate Deck Temperature and Reduct Heat Transfer
A Prototype Roof Deck Designed to Self-regulate Deck Temperature and Reduct Heat Transfer
Date
9/2011
9/2011
Author(s)
William Miller; Stan Atherton; Russel Graves; Billy Ellis
William Miller; Stan Atherton; Russel Graves; Billy Ellis
Page(s)
Keyword(s)
sheathing; attic ventilation; insulation; radiant barrier; above deck ventilation; cool roof; computer simulation
sheathing; attic ventilation; insulation; radiant barrier; above deck ventilation; cool roof; computer simulation
Abstract
A prototype roof and attic assembly exploits the use of radiation, convection and insulation controls to reduce its peak day heat transfer by almost 85 percent of the heat transfer crossing a conventional roof and attic assembly. The assembly exhibits attic air temperatures that do not exceed the maximum daily outdoor ambient temperature. The design includes a passive ventilation scheme that pulls air from the soffit and attic into an inclined air space above the roof deck. The design complies with fire protection codes because the air intake is internal and closed to the elements. Field data were benchmarked against an attic computer tool and simulations made for new and retrofit constructions in hot, moderate and cold climates to gauge the cost of energy savings and potential payback.
A prototype roof and attic assembly exploits the use of radiation, convection and insulation controls to reduce its peak day heat transfer by almost 85 percent of the heat transfer crossing a conventional roof and attic assembly. The assembly exhibits attic air temperatures that do not exceed the maximum daily outdoor ambient temperature. The design includes a passive ventilation scheme that pulls air from the soffit and attic into an inclined air space above the roof deck. The design complies with fire protection codes because the air intake is internal and closed to the elements. Field data were benchmarked against an attic computer tool and simulations made for new and retrofit constructions in hot, moderate and cold climates to gauge the cost of energy savings and potential payback.