X random lengths driftwood grey vintage shiplap.
Shiplap roofing boards.
If you nail plain wooden boards to a wall and call it shiplap that s not quite accurate.
Shiplap is now considered an enemy of asphalt shingles.
My house is from 1950.
Open spaces form between the once tightly fitted shiplap boards.
There are long wooden boards involved but genuine shiplap actually has overlapping grooves that fit together to make the design weather tight.
Sheathing is 1x8 shiplap boards actual dimensions x7 with x rabbets.
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Moving and shifting shiplap is one of the major reasons why there is a problem laying shingles directly over this inferior roof decking.
In fact most shingle manufacturers will not warranty a roof that is sitting directly on shiplap.
Roof is 1 layer of 3 tab asphalt shingles that are in need of replacement it will be a full year off.
Over time shiplap fir wood resin dissipates causing the boards to shrink crack form knot holes and become extremely brittle.
If the roofing underlayment is applied directly on top of the shiplap it will sag into the spaces and eventually leak.
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There is probably about a gap on average.
The boards are not butted tightly.
Simply put traditional shiplap is a kind of wooden board that is often used for building barns and sheds.