I have a couple of new Larch Lap panels with some of the slats starting to split. So much soo that you can see daylight thru them.
I cannot exchange them as I have coloured them.
The splits appear to be where there is a knot in the wood, and upon drying out, the tension in the knot starts a split in the slat.
There is no way you can just push the split slats together and renail throu, as there is no give.
Any ideas what to fill the gap with ??