Banner for LabNotes
From Lab Notes
Contact Information
Forest Products Laboratory
One Gifford Pinchot Drive
Madison, WI 53726-2398
Phone: (608) 231-9200
Fax: (608) 231-9592


You are here: FPL Home  / Information Products & Services  / Publications

Requested Product

Title: Summer temperatures of roof assemblies using western redcedar, wood-thermoplastic composite, or fiberglass shingles

Source: Forest products journal. Vol. 54, no. 11 (Dec. 2004): Pages 27-33

Author(s)Winandy, Jerrold E.; Barnes, H. Michael; Falk, Robert H.

Publication Year: 2004  View PDF »

Related Publications: view

Category: Journal Articles

Abstract: For over 10 years, the Forest Products Laboratory has been monitoring the temperature histories of roof sheathing, roof rafters, and unventilated attics in outdoor attic structures that simulate typical light-framed construction. This report briefly summarizes findings from the roof temperature assessment project on black and white fiberglass shingles conducted from 1991 to 2001. Temperature histories are then presented for roof assemblies made with western redcedar (WRC), wood-thermoplastic composite (WTPC), and black and white fiberglass shingles and exposed in Madison, Wisconsin, from July 15 to September 15, 2002. The maximum temperatures recorded for the shingles during this period were 68.2C for black fiberglass shingles, 59.1C for white fiberglass shingles, 47.1C for WRC shingles, and 48.7C and 46.9C for WTPC shingles with and without lathe, respectively. The black fiberglass shingles were almost 10C hotter than the white fiberglass shingles and almost 20C hotter than the WRC or WTPC shingles. Temperatures of the sheathing under the WTPC and WRC shingles were virtually identical and generally much cooler than temperatures of the sheathing under the fiberglass shingles. The sheathing under WTPC shingles applied on lathe was noticeably cooler than the sheathing under WTPC shingles installed directly on felt. The results of this study have implications for the effect of shingle type on the service life of roofing materials and the wood components of light-framed construction.

Keywords: Roof assemblies, western redcedar, wood-thermoplastic composites, fiberglass shingles, summer temperatures

File size: 116 kb(s)

This publication is also viewable on Treesearch:  view
RITS Product ID: 16477
Current FPL Scientist associated with this product
Falk, Robert H.
Research General Engineer

Additional items that might interest you
View the video celebrating FPL's 100 years of public service in 2010, from the producers of the Greatest Good....view

Research Highlights from FPL....view

Termite Eradication: A search for the Holy Grail.... view

Moisture Management in Residential Construction Series videos...view

Wood Floor Systems in Residential Construction Series videos....view
- FPL's Mission and Strategic Plan -

FPL's mission is to identify and conduct innovative wood and fiber utilization research that contributes to conservation and productivity of the forest resource, thereby sustaining forests, the economy, and quality of life. ... ..more »

- FPL Research Emphasis Areas -
Advanced Composites

As an integral part of the FPL mission, we improve the long-term sustainability of our Nation's forests by creating valuable composite products from biobased materials ... ..more »

Advanced Structures

The FPL has been in the forefront of wood-frame housing research since 1910 and has long been recognized as a world leader in such housing-related areas as engineered wood ... ..more »

Forest Biorefinery

We all know the compelling reasons that the United States needs to reduce its dependence on fossil fuels. Historically, the greatest increases in energy demand have been for transportation fuels ... ..more »


A leader in wood products research for over a century, the FPL is positioning itself to become the lead Federal research facility for the application of nanotechnology in forest products ... more »

Woody Biomass Utilization

Forests in the United States contain a substantial amount of small-diameter, overstocked, and underutilized material.FPL research projects are exploring the potential of the small-diameter ... ..more »