Saturday, March 8, 2008

Behind The Scenes

From the surface, it doesn't look like I've accomplished much today. However, if you look inside the wall you can see what I've been up to.
The area above a window or door opening in a wall is called a lintel. The building code calls for lintels to be reinforced with extra steel to make up for the concrete that isn't there because of the opening. In this case, the lintels are reinforced with four extra lengths of rebar; two on the top and two on the bottom. The top and bottom bars are held together with stirrups ("S" shaped pieces of rebar). The building code specifies the size and spacing of the stirrups according to the thickness of the lintel. Once everything is in place, all the steel is tied together with zip ties so it stays in place until the concrete is poured.

This is just to show what the stirrups look like and how they work.


  1. Hey Marlon. Great to watch your progress over the months.
    Q: How much of your exterior wall is going to be concrete?
    Q: Are you planning on having any interior electrical on these walls and if so are you putting conduit right in the wall along side the rebar?


  2. Not sure if I understand your first question. All of the exterior walls will be concrete right up to the roofline, except the gables on each end which will be 2x6 construction above the concrete up to the peak of the roof. The concrete isn’t actually “bare to the outside” though. The actual “exterior” of the walls will be vinyl siding, which goes on right over top of the foam.

    As for the electrical, there won’t be any conduit embedded in the cement. All of the wiring will be run on the interior side of the walls, in slots cut in the foam with an electric chainsaw. The slots will be cut right through the foam to the concrete (2 ¾” deep), and the wiring will be pushed in all the way so that it runs right against the concrete. That way, when you put the drywall over top of the foam, the wiring is beyond the reach of the drywall screws.

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  4. Dave said:

    I agree that it's great to watch you progress.

    I too was wondering about how the electrical was going to be done. Thanks for the explanation.

  5. Thanks Dave. Yes, please pay attention; there will be a test later. Hahaha.