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I have an outbuilding with cinderblock walls and a poured slab. What is the best way to determine if there are proper footings under the slab?
I’m trying to determine if the cinderblocks can be filled and rebarred to support the load of a hot tub, or if I have to pour proper footings and support the load with a built up 2x header under 4×4 posts. This latter approach would involve digging through the slab, and down 4′ to pour supports for posts (in a Maine climate).
Any input to determining the depth of a concrete slab would be appreciated.
Replies
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I have an outbuilding with cinderblock walls and a poured slab. What is the best way to determine if there are proper footings under the slab?
I'm trying to determine if the cinderblocks can be filled and rebarred to support the load of a hot tub, or if I have to pour proper footings and support the load with a built up 2x header under 4x4 posts. This latter approach would involve digging through the slab, and down 4' to pour supports for posts (in a Maine climate).
Any input to determining the depth of a concrete slab would be appreciated.