The thickness of plywood used for roof decking depends on the roof slope, the spacing of rafters and the weight of other material to be put over . Plank sheathing (usually 1×or 1×8) was used as a roof deck before plywood. In the first half of the 20th Century, roofs in Missouri were built . According to Joonala, this saves time and significantly reduces costs. Roofers have a number of structural panels to select from when selecting an appropriate roof sheathing , including plywood , OSB and zip wood.
The recommendations for roof sheathing in Table apply to APA RATED.
Low slope roofs are applicable to built-up, single- ply and modified bitumen roofing . Roof decking bakes in the sun, freezes in the col and may be . What is better for a roof , plywood or OSB? Pressure treated plywood for roof deck? Can pressure treated plywood be used as roof decking without being destroyed by the dry heat a roof is exposed to? In This video I show how to replace rotten plywood on your roof without breaking your back! A Roof Replacement Case Study from ARAC Roof It Forward.
Far too often I see OSB “sag” between the trusses making your roof look.