Effective Thermal Insulation (Reff) group:

15.2
17.75
2X4
8 o.c.
R14 batt
7/16 in. OSB
Vinyl
15.2
17.75
2X4
8 o.c.
R14 batt
1/2 in. Plywood
Vinyl
15.3
17.75
2X4
12 o.c.
R14 batt
7/16 in. OSB
Vinyl
15.3
17.75
2X4
12 o.c.
R14 batt
1/2 in. Plywood
Vinyl
15.5
17.75
2X4
16 o.c.
R14 batt
7/16 in. OSB
Vinyl
15.5
17.75
2X4
16 o.c.
R14 batt
1/2 in. Plywood
Vinyl
15.5
19
2X6
8 o.c.
R19 batt
7/16 in. OSB
Vinyl
15.5
19
2X6
8 o.c.
R19 batt
1/2 in. Plywood
Vinyl
15.7
17.75
2X4
19.2 o.c.
R14 batt
7/16 in. OSB
Vinyl
15.7
17.75
2X4
19.2 o.c.
R14 batt
1/2 in. Plywood
Vinyl
15.7
19
2X6
12 o.c.
R19 batt
7/16 in. OSB
Vinyl
15.7
19
2X6
12 o.c.
R19 batt
1/2 in. Plywood
Vinyl
15.9
19
2X6
16 o.c.
R19 batt
7/16 in. OSB
Vinyl
15.9
17.75
2X4
24 o.c.
R14 batt
7/16 in. OSB
Vinyl
15.9
19
2X6
16 o.c.
R19 batt
1/2 in. Plywood
Vinyl

Please note that the calculation of effective thermal resistance was performed in compliance with NBC Subsection 9.36.2. of Division B.

DISCLAIMER: The Canadian Wood Council’s Wall Thermal Design Calculator has been developed for information purposes only. Although all possible efforts have been made to ensure that the information on this tool is accurate, the CWC cannot under any circumstances guarantee the completeness, accuracy or exactness of the information. Reference should always be made to the appropriate Building Code and/or Standard. This tool should not be relied upon as a substitute for legal or design advice, and the user is responsible for how the tool is used or applied.

Although all possible efforts have been made to ensure that the information on this tool is accurate, we cannot under any circumstances guarantee the completeness, accuracy or exactness of the information. Suggestions regarding this tool are welcome. If you feel that areas are missing, unclear or incorrect, please forward your suggestions to wtd@cwc.ca

Version 3.0 – July 28, 2015