Old Roof Sheathing

These 8 to 12 inch wide boards were nailed together tight.

Old roof sheathing.

If conditions are right new shingles laid over old shingles can be just as attractive and durable as shingles laid on bare sheathing. And if you re still wondering what roof sheathing is and what materials are typically used read on and satisfy your curiosity. 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. Because the plywood roof sheathing under the shingles has become brittle and weak he plans to install new plywood as well as new shingles.

The typical thickness range for sheathing is 3 8 to 3 4 inch. 8d ring shank nails should be used instead. The new plywood thickness should be. Putting a safe roof over your head isn t necessarily a one time deal.

Over time shiplap fir wood resin dissipates causing the boards to shrink crack form knot holes and become extremely brittle. As roofing contractors in seattle we are often asked why do we need plywood over our old solid sheathing. But you must take care to install shingles correctly so they lie flat. Never attach roof sheathing with staples.

If you re in search of quotes for a roof sheathing job improvenet can put you in touch with up to four local contractors for free. Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame. As long as the new plywood itself can span the distance and carry the roof wind seismic and snow loads for your region adding new ply over old is just fine. After the 1960s the predominant residential roofing substrate became 1 2 cdx plywood.

Roof sheathing materials plywood. Comes in standard 4 by 8 foot sheets is strong. But can he simply install new plywood over the old. The keyword here is solid it used to be standard to use shiplap 1 boards tongue groove or other boards for the roof deck.

Today a shiplap roof is usually 60 years old. Open spaces form between the once tightly fitted shiplap boards. Installation is easier than for a tear off job because you can use the existing shingles as guides for laying the new ones.