USING WATKINS ON PINE, WALNUT,OAK--INTERIOR OF SAUNA

Well, it depends on which species of those woods you’re actually talking about, where you plan to use them in the sauna, and what type of construction you’re going to use.

Is it an indoor sauna? Are you getting all of this kiln-dried (I hope so)?

You have to provide a little more information to get a good answer.

-- "Well, at least we can still use it as firewood... maybe." - Doss

It’s an outdoor sauna. BLACK WALNUT,BOX STORE PINE?, WHITE 0AK

-- Mitakuya Oyasin

I’m not a sauna-building expert, but I do use them and they are almost always softwood around here (usually Western Red cedar). So, out of those 3, I’d use pine. Big box stores usually have WR cedar though. Make sure the wood is defect free.

Do you plan on using it just for the seating or for the walls, floors, and ceiling as well?

-- "Well, at least we can still use it as firewood... maybe." - Doss