The information listed in the table below is based on the
Cedar Shake and Shingle Bureau, (CSSB-97) grade revisions for all Western
Red Cedar Certigrade® 24" Royal shingles. It is intended to be used a
guide for product use and grade selection only. Thank you.
| Red Cedar 24" Royal
Shingles |
No.1
Blue |
No.2
Red |
No.3
Black |
No.4
Green |
| WOOD: |
Clear Area
- above the butt |
All |
16" |
10" |
n/a |
| |
Sapwood |
None |
1" |
Yes |
n/a |
| |
Flat Grain |
None |
Yes |
Yes |
n/a |
| |
Checks/Cracks |
None |
4" (to 20") |
6" (to 18") |
n/a |
| |
Defect Size |
None |
3" |
3" |
n/a |
| |
Total Defect |
None |
1/2 width |
2/3 width |
n/a |
| LENGTH: |
Maximum |
None |
None |
None |
n/a |
| |
Minimum |
23" |
20" |
18" |
n/a |
| |
Exposure Line |
7-1/2" |
6-1/2" |
5-1/2" |
n/a |
| WIDTH: |
Maximum |
None |
None |
None |
n/a |
| |
Minimum |
4" |
4" |
4" |
n/a |
| |
Undersize % |
None |
20% |
30% |
n/a |
| |
Min. Undersize |
None |
3" |
3" |
n/a |
| |
Off Parallel/Square |
3/8" |
3/8" |
3/8" |
n/a |
| THICKNESS: |
5 butts, measured together to equal 2-1/2" |
| COVERAGE: |
4 bundles per square |
465 lineal inches on grade per bundle |
| PACK: |
18" wide frame |
14/15 pack |
| |
20" wide frame |
13/14 pack |
Guide to CSSB-97 Grading Rules
Conforms to UBC 15-4, CSA 01118.1-97, CSSB-97
