CCC
Hot Rolled
- Joined
- Apr 11, 2006
- Location
- Central Illinois
I'm demolishing a 12'x20' outbuilding and building a 15'x24' one in its place. The old slab is 8 inches thick. I need to raise the floor of the new building by at least 6 inches for drainage reasons.
So I want to pour the new slab over the old. The inspector will let me do it. My question is: do I try to tie the two slabs together as much as possible (bolts / concrete paint in between) or do I try and let them float as much as possble (sand / rock / foam in between). The old slab, 60 years old now, is pretty cracked, but the soil isn't bad.
If it makes a difference, the new slab isn't centered on the old. The SE corner will be the same as the old, and the new slab will extend more to the N and W.
Also, I'll put up a tarp on tent stakes (instead of a building) before I'm willing to break up and haul out the eight inches of existing concrete, so that's not really the advice I'm looking for.
Anybody have any experience with this?
So I want to pour the new slab over the old. The inspector will let me do it. My question is: do I try to tie the two slabs together as much as possible (bolts / concrete paint in between) or do I try and let them float as much as possble (sand / rock / foam in between). The old slab, 60 years old now, is pretty cracked, but the soil isn't bad.
If it makes a difference, the new slab isn't centered on the old. The SE corner will be the same as the old, and the new slab will extend more to the N and W.
Also, I'll put up a tarp on tent stakes (instead of a building) before I'm willing to break up and haul out the eight inches of existing concrete, so that's not really the advice I'm looking for.
Anybody have any experience with this?