I am finishing a 3-season room addition to my cabin. Much of the exterior is rough sawn hemlock from a local Amish mill. I would like to continue that rustic look on the inside by butt-jointing rough-sawn hemlock paneling on the walls and ceiling – much like the 100 – 150 year old barns in my area that are constructed of hemlock.
This supplier can provide boards up to 20 in. wide and as thin as 1/4 in. Because this addition is constructed on what was previously a deck, albeit a very sturdy one, the overall weight of the structure is somewhat of concern and I'm considering using thinner boards in the neighborhood of 3/16 in. I've used 1 and 2 in thick air-dried hemlock in other applications, so I'm well aware of the shrinkage that can occur.
Does anyone have any experiences using air-dried, rough-sawn hemlock for this application (i.e., what is the minimum board thickness I should consider to minimize checking, splitting, etc.?)? Are there any other potential problems I might encounter?
Thanks for any suggestions, Dave