Re: ShipLap Cladding

[Andy Dingley]

Have built a shed with a strong frame and used shiplap cladding. The

>Cladding is securely nailed to the frame

You shouldn't nail things securely on outdoor structures - wood moves with moisture changes, and it will either warp, split or pull the nails out. It _will_ move, you'll never "nail it down".

Shiplap boards (any lapped boards) should be nailed with one nail at each end (maybe in the middle too), but these nails should all be in a line along the grain. Don't put lines of nails across the grain.

Expect about 10% movement (enormously rough guess) and so allow at least 15% overlap (assuming further shrinkage).

[jerrybuilt]

Nail into each noggin about 1" up from the bottom of each board, as AD says, however one nail at each end and one in the middle is not enough in most cases. You must not mail through the bottom of one board and the top of another (or each edge, in featherboarding, for instance).

Yes, enormously.

I don't think you can do that on most shiplap boards, they can't be overlapped that much. The rebate usn't that deep!