With the basement plumbing approved the next step is backfilling the under slab area with gravel, covering that with insulation, and eventually rebar and the piping to carry the heated water to warm the basement slab. All of this requires the orchestration of multiple crews, in this case the gravel slinger crew, insulation and rebar crew, and the plumber to put in the tubes. Once installed, the City inspector is called to review the installation and check the pressure test on the lines. Fortunately our tubing maintained an 80 psi rating over 24 hours, and the engineered drawings for the heating loops was satisfactory. Now the only remaining step is the actual pouring of the concrete slab. Once again we are fighting the weather. Without a shingled roof, we can't proceed with pouring the slab unless we are confident it will not rain (or in our case, snow).
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| Once again the gravel slinger arrives on site with many loads of gravel. The gravel is bucketed around the basement and then tamped to form a compact surface |
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| The sump pump is connected by the plumber to the weeping tile and the exterior patio drain |
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| insulation is applied to the gravel surface |
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| Rebar and tubes are complete |
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| Lines are pressurized to ensure there is no leak in the network |
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