Old Roof Sheathing

After the 1960s the predominant residential roofing substrate became 1 2 cdx plywood.

Old roof sheathing.

Installation is easier than for a tear off job because you can use the existing shingles as guides for laying the new ones. And if you re still wondering what roof sheathing is and what materials are typically used read on and satisfy your curiosity. But can he simply install new plywood over the old. These 8 to 12 inch wide boards were nailed together tight.

Putting a safe roof over your head isn t necessarily a one time deal. The anchor of the system that keeps water out the base onto which you nail your roofing the major part of the brace system for your trusses rafters a key piece of the stiffening system that protects your house from earthquakes and blasts of wind. But you must take care to install shingles correctly so they lie flat. The new plywood thickness should be.

If conditions are right new shingles laid over old shingles can be just as attractive and durable as shingles laid on bare sheathing. Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame. As roofing contractors in seattle we are often asked why do we need plywood over our old solid sheathing. Roof sheathing materials plywood.

The keyword here is solid it used to be standard to use shiplap 1 boards tongue groove or other boards for the roof deck. Comes in standard 4 by 8 foot sheets is strong. Today a shiplap roof is usually 60 years old. Sheathing should be a minimum of 19 32 inch thick.

8d ring shank nails should be used instead. The toh pros offer up their best advice for shingling properly sniffing out leaks and knowing when it s time to reroof an old roof. The typical thickness range for sheathing is 3 8 to 3 4 inch. Over time shiplap fir wood resin dissipates causing the boards to shrink crack form knot holes and become extremely brittle.

Shingles stain condensation collects and high winds carry roofs wherever they please. Because the plywood roof sheathing under the shingles has become brittle and weak he plans to install new plywood as well as new shingles. Never attach roof sheathing with staples.