Roof Plank Sheathing

Plank sheathing usually 1 6 or 1 8 was used as a roof deck before plywood.

Roof plank sheathing.

Today a shiplap roof is usually 60 years old. After the 1960s the predominant residential roofing substrate became 1 2 cdx plywood. Solid sheathing most new homes built after the mid to late 80 s typically have solid roof sheathing. As the boards to do the roof deck were manufactured here in the northwest it was still more economical than plywood through the 60s.

If your home was built prior to 1970 there is a good chance it will have board sheathing. Here a barrel type roof is undergoing restoration and the original board sheathing is being preserved. The issue guertin explains is the gaps between boards. Can a roofer determine the state of my decking before starting the roof replacement.

Even if we filter it down to board sheathing only there can be square edges shiplap edges spaced decking and the ordinary tongue and groove that. Open spaces form between the once tightly fitted shiplap boards. Without these many of the nails used to install the shingles will fall between the sheathing and the first wind storm will blow your shingles off. Hello everyone i come across many roofs like this with space sheathing people that don t know about roof specs think you need to install.

Over time shiplap fir wood resin dissipates causing the boards to shrink crack form knot holes and become extremely brittle. Your roofer will attach your shingles to these squares or planks of wood. The plank problem typically sheathing problems are isolated to small areas but old plank sheathing presents more of a challenge. They can be of several configurations.

Plank decking in older homes plank decking may have been used for the roof decking substrate. In the first half of the 20th century roofs in missouri were built with wood shingles over planks spaced about 1 apart. Roof sheathing is usually made of either oriented strand board osb or plywood. On older homes planks were often spaced for wood or slate roofs with wider exposures than the standard 5 inch tab on asphalt shingles.

Exterior grade plywood was not available until the 1940 s. Roof sheathing also known as roof decking is a strong layer of wood boards that are fixed to your roof s joists and trusses. What s roof sheathing made of. If you have spaced or plank sheathing osb or plywood will need to be added to completely cover the roof.