7 Best Of What Size Plywood Should I Use For My Roof Best Images PNG. The plywood or OSB you use for a base underneath your metal roofing should be at least 716 inch thick. When the roof was first nailed on of course all the nails were in solid wood.
Sep 27 2020 Be sure to use plywood that is thick enough. International Association of Home Inspectors. Steeper rather than flatter roofs will have lesser load per sq.
These 8 to 12-inch wide boards were nailed together tight.
The more common roof thickness is 34-inch decking. Plywood thicknesses for roofs start at 38 in areas with light load requirements on rafters at 16 centers. Dec 06 2018 Sheathing Sizes OSB and plywood come in thicknesses ranging from 516 to 34 inch and the thickness needed for a particular roof depends on several factors including rafter spacing expected load. Steeper rather than flatter roofs will have lesser load per sq.