Roof Plank Sheathing

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.

Roof plank sheathing.

Your roofer will attach your shingles to these squares or planks of wood. 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. After the 1960s the predominant residential roofing substrate became 1 2 cdx plywood. Roof sheathing also known as roof decking is a strong layer of wood boards that are fixed to your roof s joists and trusses.

The plank problem typically sheathing problems are isolated to small areas but old plank sheathing presents more of a challenge. Over time shiplap fir wood resin dissipates causing the boards to shrink crack form knot holes and become extremely brittle. In the first half of the 20th century roofs in missouri were built with wood shingles over planks spaced about 1 apart. 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.

Exterior grade plywood was not available until the 1940 s. Spaced or skip decking many older homes in older. Plank sheathing usually 1 6 or 1 8 was used as a roof deck before plywood. Open spaces form between the once tightly fitted shiplap boards.

Roof sheathing is usually made of either oriented strand board osb or plywood. If you have spaced or plank sheathing osb or plywood will need to be added to completely cover the roof. On older homes planks were often spaced for wood or slate roofs with wider exposures than the standard 5 inch tab on asphalt shingles. If your home was built prior to 1970 there is a good chance it will have board sheathing.

Plank decking in older homes plank decking may have been used for the roof decking substrate. Today a shiplap roof is usually 60 years old. The issue guertin explains is the gaps between boards. Figure 1 consultants are likely to encounter wood planks on older structures.

Solid sheathing most new homes built after the mid to late 80 s typically have solid roof sheathing. Click to enlarge wood plank decks being found in low sloped pitched and even curved surfaces can take many forms. What s roof sheathing made of. Can a roofer determine the state of my decking before starting the roof replacement.