5 Best Of What Size Plywood Do You Use On A Roof HD Image Size. This kind of plywood can be used on roofs with minimal load. Plywood typically comes in 48 ft.
Sheet with varying thickness. Knowing this number can help you determine how many sheets of plywood you need for your roof. Install a felt moisture barrier.
I would use advantech instead of plywood.
You just need to multiply the length by the width. Half inch on a roof is usually OK and very common at least around here. Sep 27 2020 The plywood or OSB you use for a base underneath your metal roofing should be at least 716 inch thick. Boards measuring 1 inches by 4 inches or 2 inches by 4 inches are commonly used for purlins though never use treated lumber because it will corrode the steel roof and fasteners.