A utility grade primarily used for undercoursing prior to final coursing application. Not less that 150mm clear on 455mm shingles. Unlimited defects, sapwood and flat grain are permitted in this grade.
At a glance
No. 4 Utility grade green label shingles
Recommended for undercoursing, sidewalls or secondary buildings
Certi-label product assurance
16-18" length, minimum 2 ½" width