I have some shiplap cladding, on the house, the original T&G rotted away The area is very exposed to coastal storms and water cascades down it..
Mine is on counterbattens with roofing felt behind to prevent rain penetration to the inside
and I detailed it with the bottom boards kicked out slightly beyond the base dwarf wall so water would not land on top of it and pool or run inside. the original boards were in contact with the top of the dwarf wall so standing in water whenever it rained, so they rotted.
concrete or wooden bases for wooden outbuildings should preferably lie inside the footprint of the structure so rain cannot land on it and pool. I also treated all my timber with water-repellent stain before assembly so water would not easily soak in even if it ran down the inside.
I suppose you could add a roofing membrane on the inside, though this would be difficult now it has been lined. Or maybe increase the overhang to keep rain off the walls. Try tacking some guttering up.
or even batten and re-clad the outside on the weather side though this would be tiresome. Or you could wait until it rots and then reclad. Is the studwork framing dry?
The bottom boards are going to be wet and rot unless you come up with an alternative. My other shed has a 6-inch stainless strip like a skirting board to protect the bottom edge. luckily only one short end is exposed
Mine is on counterbattens with roofing felt behind to prevent rain penetration to the inside
and I detailed it with the bottom boards kicked out slightly beyond the base dwarf wall so water would not land on top of it and pool or run inside. the original boards were in contact with the top of the dwarf wall so standing in water whenever it rained, so they rotted.
concrete or wooden bases for wooden outbuildings should preferably lie inside the footprint of the structure so rain cannot land on it and pool. I also treated all my timber with water-repellent stain before assembly so water would not easily soak in even if it ran down the inside.
I suppose you could add a roofing membrane on the inside, though this would be difficult now it has been lined. Or maybe increase the overhang to keep rain off the walls. Try tacking some guttering up.
or even batten and re-clad the outside on the weather side though this would be tiresome. Or you could wait until it rots and then reclad. Is the studwork framing dry?
The bottom boards are going to be wet and rot unless you come up with an alternative. My other shed has a 6-inch stainless strip like a skirting board to protect the bottom edge. luckily only one short end is exposed