Insulated slab in Climate Zone 5B?
Hi, I’m working on drawings for a shed, and planning ahead, in case it becomes a tiny home in the future. I’ve read GBA articles on this subject, including the latest one from April 15th.
On another project, we did horizontal insulation under the slab, and radiant tubing. We found that we didn’t really need the tubing, since the insulation kept the garage floor warm. On this project, we might add electric radiant heat later on.
In my attached drawing, I’m showing an insulated perimeter. For Zone 5B, knowing that we might add electric radiant heat later, should we also add horizontal insulation under the slab?
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