OP
Laminarman
Gold Member
I went with 1" x 12" boards and 1" x 4" battens and it works great. This was green eastern white pine as the mill was out of hemlock when I needed it. I was going to go with 3" batts, but a friend talked me into 4". Glad I did, as the 1x12's shrink enough to be barely covered in places. One more tip, it's not too much more money or work, go ahead and wrap the whole thing in Tyvek (or the cheaper equivilent) after the purlins, but before the siding. Any cracks, gaps you do have won't allow air infiltration with the Tyvek. My father didn't on his, and has problems when rain comes out of the north. Mine is dry as can be, despite a few through checks in the siding.
The issue with board and batt - deciding whether or not to stain it. If you do it once, you will do it every few years. The alternative is to let it grey and weather. It will still last a long time, but probably not as long as if it's properly stained.
Hope that helps.
Jon Hunter
Would it be prohitively more money to use regular dimensional kiln dried lumber to minimize shrinkage? I haven't priced rough cut lumber...yet.