Roof Plank Sheathing

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Roof plank sheathing.

Roof decks on homes built before 1970 are often 1 8 fir pre plywood shiplap. Never attach roof sheathing with staples. Again if this type of decking is discovered during the tear off of the roof shingles a thorough inspection must be made to make sure that it is in good overall condition and that the gaps between the individual. 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.

In the first half of the 20th century roofs in missouri were built with wood shingles over planks spaced about 1 apart. Typically plank decking material is either 1 x6 or 1 x8 lumber. Until the 1940s exterior grade plywood was not available. 8d ring shank nails should be used instead.

The zip system is a structural sheathing intended for walls and roofs with an osb base and wrb weather resistive membrane which is basically a mesh that is attached to an osb sheathing panel with a paint applied. Sheathing should be a minimum of 19 32 inch thick. Plank sheathing usually 1 6 or 1 8 was used as a roof deck before plywood. Zip sheathing is a pretty hot topic with some differing opinions.

Roof sheathing also known as roof decking is a strong layer of wood boards that are fixed to your roof s joists and trusses. Plank decking in older homes plank decking may have been used for the roof decking substrate. On older homes planks were often spaced for wood or slate roofs with wider exposures than the standard 5 inch tab on asphalt shingles. Your roofer will attach your shingles to these squares or planks of wood.

So anytime your board decked roof is torn off and you want to install composition shingles be sure to lay down solid sheathing first. The plank problem typically sheathing problems are isolated to small areas but old plank sheathing presents more of a challenge. Was your roof originally built with shiplap. If you re replacing your cedar shakes roof check out our discussion of re sheeting over skip sheathing.

The issue guertin explains is the gaps between boards. Both materials are made of. Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame. The typical thickness range for sheathing is 3 8 to 3 4 inch.