Journal N3Bruce's Journal: Homebuilding
The concrete crew is working on the foundation, today they are putting in the drain system. Pretty basic, they lay a perforated pipe around the perimeter of the foundation on a gravel bed, then route the drainpipe into a hole where the sump pump will go. This is done on the inside of the foundation. On the outside, there is a similar bed of gravel which is covered with a fine mesh fabric to separate it from the backfill dirt. Water trapped in the gravel finds its way into the interior drains through small conduits spaced every 4 feet placed in the footers of the foundation. Once all the drains are laid, the basement floor is covered with crushed stone, and the foundation is sealed, then backfilled.
Its pretty low-tech at this point, with most of the work done with wheelbarrows and a cement mixer to pour the stone into the hole. During the concrete pour, they used a concrete pump to transfer the concrete from the trucks into the forms, a piece of equipment every bit as impressive as the well drilling rig.
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