Old Roof Sheathing

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

Old roof sheathing.

Comes in standard 4 by 8 foot sheets is strong. The new plywood thickness should be. But can he simply install new plywood over the old. 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 toh pros offer up their best advice for shingling properly sniffing out leaks and knowing when it s time to reroof an old roof. Putting a safe roof over your head isn t necessarily a one time deal. 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. Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame.

And if you re still wondering what roof sheathing is and what materials are typically used read on and satisfy your curiosity. 8d ring shank nails should be used instead. Shingles stain condensation collects and high winds carry roofs wherever they please. Roof sheathing materials plywood.

Never attach roof sheathing with staples. Open spaces form between the once tightly fitted shiplap boards. 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. As roofing contractors in seattle we are often asked why do we need plywood over our old solid sheathing.

Today a shiplap roof is usually 60 years old. The typical thickness range for sheathing is 3 8 to 3 4 inch. Sheathing should be a minimum of 19 32 inch thick. Over time shiplap fir wood resin dissipates causing the boards to shrink crack form knot holes and become extremely brittle.

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. These 8 to 12 inch wide boards were nailed together tight. But you must take care to install shingles correctly so they lie flat.