This step involves pouring the slab that will become the foundation for the living room expansion and the office. The slab will be poured over part of the backfilled area and will rest on top of the block wall. To get ready for this, more gravel is placed over the backfilled area and made level, then covered with a layer of special plastic sheet that serves as a barrier to keep ground water from coming up into the concrete. The sheet is called Stego and it is made of 15 mil polyolefin. Mark says it holds up better than Visqueen which was the old standard for this purpose.
Form boards have been set up on top of the retaining wall, and these have been measured precisely so that the top of the boards is exactly at the desired floor level. The concrete will be poured up to the top of the boards and finished so that the new slab is perfectly even with the existing slab of the house. This will give us a flat, level surface for installing the flooring and it will tie the addition into the existing structure to make it a single unit. John Etchells has started working with Mark and Al to help build the forms, lay the rebar and place the anchor bolts.
The final task before actually pouring the concrete is inspection. The inspector looked everything over, asked a few questions, and signed the inspection card giving us to okay to pour the concrete
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