1 2 Inch Osb For Roof

Features span rated sheathing 32 16 roof floor on center spacing exposure 1 rated for limited exposure exterior glue for general construction sized for spacing panel width and length may vary up to 1 8 to aid with.

1 2 inch osb for roof.

30 years on it s working out fine. Here in snow country 1 2 osb is standard with 7 16 being common for walls. This way no worrying about grabbing scraps to fill in small spots and not having the correct thickness. Sheets must have a 1 8 inch expansion gap between them and should be secured to the rafters.

3 4 is unheard of and i d consider it absurdly wasteful. Osb roof decking thickness 7 16 1 2 or 5 8 if were using osb we get 9 16 we dont worry about getting both 7 16 and 9 16 for walls then the roof we just get all of the same. Half inch osb is suitable for rafter spacings up to 24 inches whether or not the edges are supported. 7 16 is adequate but you dont want to have to many people or shingles in one spot.

Isherwood jul 26 16 at 15 19. My solution when i built our garage was trusses on 19 3 center the canadian std and 5 8 osb. One option is to try some test fasteners in the osb. 1 2 vs 5 8 roof sheathing that amazing i dont know of one builder here in minnesota that uses 5 8 for roof decking most use 7 16 osb and have seen a few who use 3 8 cdx.

Only once in many years of construction did i see someone pay for 5 8 osb on a roof presumably to prevent any slight sagging years down the road. Oriented strand board questions page 2 y 2020 m 10 d 4 h 15cst bvseo bulk prod bvqa vn bulk 3 0 12 cp 1 bvpage1 co hasquestionsanswers tq 78 loc sid 100072564 prod sort sortentry order num. 3 8 is insane walking truss to truss. If you get 45 or more pounds of pull out resistance that s considered acceptable for most applications.

Roof leaks of course but also improper attic ventilation can cause condensation in the roof deck that can cause the osb to weaken.