Parking a Car on an Insulated Slab
I’m in the early stages of planning a multipurpose outbuilding. This will include a fully conditioned workshop, storm shelter, animal barn, storage, solar collection/distribution and garage. Maybe a cold room as well. I will probably have the garage portion partially conditioned, that is to say it will be conditioned but not as strictly as the rest of the building. I will do maintenance on cars, tractors, etc. in there, so sometimes it will be brought to room temperature, but most of the time it will just be maintained in the 10-25degC range. The animal barn part will be a lean-to, getting some heating from the main building but not sharing ventilation air.
For the purposes of conditioning, an insulated slab is obviously best. I’m biased toward a floating slab on an EPS raft, due to my experience with it in my house. Would that be a bad idea for the garage portion? Should I look at having a separate slab for the garage section? Can a slab on EPS or mineral wool stand up to the weight of a typical car, point loads of about 1000lbs?
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