Shiplap Roofing Boards

Simply put traditional shiplap is a kind of wooden board that is often used for building barns and sheds.

Shiplap roofing boards.

If you nail plain wooden boards to a wall and call it shiplap that s not quite accurate. Over time shiplap fir wood resin dissipates causing the boards to shrink crack form knot holes and become extremely brittle. Moving and shifting shiplap is one of the major reasons why there is a problem laying shingles directly over this inferior roof decking. While shiplap may look like plain run of the mill wood panels that s not the whole story.

Roof is 1 layer of 3 tab asphalt shingles that are in need of replacement it will be a full year off. Sheathing is 1x8 shiplap boards actual dimensions x7 with x rabbets. Shiplap is now considered an enemy of asphalt shingles. Primed pine nickel gap ship lap board 6 pieces per box model 0028994 view the primed ship lap board collection in pine nickel 63 69 box 63 69 box free delivery.

There is probably about a gap on average. In fact most shingle manufacturers will not warranty a roof that is sitting directly on shiplap. If the roofing underlayment is applied directly on top of the shiplap it will sag into the spaces and eventually leak. The boards are not butted tightly.

Shiplap has a groove cut into the top and bottom which allows the boards to fit together and gives it a unique appearance. Set your store to see local availability add to cart. There are long wooden boards involved but genuine shiplap actually has overlapping grooves that fit together to make the design weather tight. Open spaces form between the once tightly fitted shiplap boards.