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Ask the Builder: Pavers laid in sand are no match for burrowing animalsThe chipmunks might recreate their tunnel maze in the gravel and soil under the slab, but the concrete will span the ...
The concrete slab is often placed on a layer of sand for drainage or to act as a cushion. Houses built on a slab lack crawl ...
If there is ground settlement or frost heaving due to lack of water drainage under slabs ... of sand or fine aggregate has a large influence on finishability — too much sand makes concrete ...
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