Roof Rating Of 2 Or 3

For rafters spaced 20 or more inches apart 1 2 or 5 8 inch plywood is recommended.

Roof rating of 2 or 3.

Neglecting your roof can be a costly mistake. Understanding roof fire ratings class a roofing. And it weighs about the same as asphalt so there s no need to beef up the. Both are burn through tests and the ultimate roof systems rating is the lowest of the three tests.

Owens corning 33 3 square foot three tab roofing shingles cost roughly 22 50 per unit. Become a member or sign in. Black jack elasto kool 1000 5 gallon elastomeric reflective roof coating 10 year limited warranty item 139941. Black jack silver seal 300 4 75 gallon aluminum reflective roof coating 3 year limited warranty item 12035.

The brands consist of an ignited wood lattice placed directly on top of the test specimen. Roofing shingles and materials plus factory certified roofers including ratings from real homeowners from north america s largest roofing manufacturer. The most common rafter spacing is 24 inches and 5 8 inch plywood is recommended for that. For pricing and availability.

If the roof deck is combustible such as wood plywood or osb two additional tests must be conducted. This composite material looks like the real thing even close up but costs a lot less. Their laminated architectural shingle is a bit smaller at 32 8 square foot and run at the slightly higher cost of 25 or so per unit. Class a roofing is the preferred choice for any home but this type of roofing is particularly important if you live in an area that is prone to wildfires to achieve a class a rating the roof must be effective against severe fire exposure.

And access over 9 000 products and services rated. The class a brand weighs 2 000. 2500 high roof w 159 wb 3dr van 3 6l 6cyl 6a 21 of 22 people found this review helpful i bought it to haul my off road motorcycles and it works very well for that purpose.