I am preparing to pour a concrete slab for the detached sauna I am building. Concrete pouring weather here is still a few weeks away, so I am still in the planning stage. The sauna will be heated by a medium Kuuma sauna stove (about 400lbs). The stove is capable of heating the sauna room up to about 190F.
I have questions about the slab under the stove area (that section is approximately 6x8). I would prefer to use a 6 inch slab, with rebar and 2 inch rigid foam insulation underneath. My concern is about whether this could cause problems from the stove heat.
The rigid insulation I plan on using is rated for use at temperatures up to 165F. (Owens Corning Foamular). So, my first question is whether the heat generated from the stove would cause the bottom of the slab to exceed this level. I have no idea how to even approach this question.
The second question in my mind concerns the rebar. My instincts tell me that rebar will conduct heat, and may expend a bit. Would this process be likely to crack the slab?
Many thanks
Kurt
I have questions about the slab under the stove area (that section is approximately 6x8). I would prefer to use a 6 inch slab, with rebar and 2 inch rigid foam insulation underneath. My concern is about whether this could cause problems from the stove heat.
The rigid insulation I plan on using is rated for use at temperatures up to 165F. (Owens Corning Foamular). So, my first question is whether the heat generated from the stove would cause the bottom of the slab to exceed this level. I have no idea how to even approach this question.
The second question in my mind concerns the rebar. My instincts tell me that rebar will conduct heat, and may expend a bit. Would this process be likely to crack the slab?
Many thanks
Kurt