Home   |   Education   |   Membership   |   News   |   FAQs   |   About Us
Members:   Login   |   Register
YouTube   Twitter   LinkedIn   AWC Store
American Wood Council

What are the thermal R-values for wood?

USDA Forest Products Lab Wood Handbook, Table 4-7 entitled Thermal conductivity of selected hardwoods and softwoods lists thermal properties for various species of wood. The table is available online as a PDF file at:

Canadian Wood Council has a Technical Bulletin on Thermal performance of light-frame wood assemblies. It discusses an R value of 1.5/inch of thickness for wood products:

Also, from 1993 ASHRAE standard, the R value per inch of thickness is about 1.1 F*ft^2*h/BTU per inch of thickness.

American Wood Council
222 Catoctin Circle SE, Suite 201
Leesburg, VA 20175

- Public Policy Office -
1101 K Street NW, Suite 700
Washington, DC 20005
- Phone -
General: 202-463-2766
General Fax: 703-771-4079
Publications: 800-890-7732
Publications Fax: 412-741-0609
- Email -
Technical: info@awc.org
Publications: publications@awc.org
Education: education@awc.org
Fire: fire@awc.org
© Copyright 2019 American Wood Council. All Rights Reserved.