Is there anything that needs to be added when covering up an existing slab with sand, XPS and 4" more of concrete?
See the attached diagram which shows (from bottom layer up) ground, existing slab, sand, XPS, concrete with heating PEX. The concrete will be polished and be the completed floor surface.
I can't find this scenario anywhere except someone said putting a second slab was ludicrous:-)
This is a remodel, where a one story residence will replace a 2 story house. So the new structure, so to speak, will be built on what was the garage/shop level with a slab 9" below the perimeter foundation. The goal is to bring the finished concrete floor up to level with the top of the foundation.
Posted Fri, 12/13/2013 - 16:23
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