S2E8 Backfilling, Leveling, and Compacting Gravel under Slab
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12m
The process begins with preparing the foundation by filling it with a four-inch layer of three-quarter inch clean stone. Proper insulation placement is crucial, along with radon gas mitigation using a PVC pipe for ventilation. Leveling techniques, including a string line method, ensure consistent slab height. A plate compactor stabilizes the surface to prevent cracking. Finally, insulation board, vapor barrier, and rebar grid are set up before pouring concrete.
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