Glossary / Class B
Class B
The middle roof-assembly class under ASTM E108 or UL 790. Oregon R327’s floor is Class B equivalent. Class B is not Class A.
Related
- class a
- assembly
- covering
- roofing
- astm-e108-ul-790
- Oregon R327 versus California CWUIC
- Class A covering is not a bag of shingles
Where this term is used
- A Class A rating is not a service-life clock
- Class A covering is not a bag of shingles
- Colorado CWRC versus Oregon R327 versus California CWUIC
- Covering versus assembly
- Fire apparatus access on the lot
- How clean is clean enough
- How to read a Class A roof listing
- How to read a listing