These headers should be 2x10 or 2x12 for larger openings. After all the walls are raised, nailed to the bottom plate, and plumbed, an additional top plate is added randomly to add additional strength to the wall.Īt this time the headers (2x8 with 1/2" plywood in between) for the windows and doors, both interior and exterior, will be added above the liners that were nailed beside the studs. Using supporting diagonal 2x4 braces to hold them in place, these braces should be left in place until all of the exterior sheathing is applied.
The framers will then construct the walls (one by one) laying them out on the slab with one top plate, openings for the windows and doors, and raise and plumb them. This bottom plate should be attached with concrete nails or "shot-down" with CO2 gun.
This adhesive is applied under all walls of the house, not simply the exterior walls (this is purchased in large tubes and applied with a large caulk gun). This bottom plate must also be sealed with a generous application of construction adhesive. The main difference, if you are working on a block/slab or monolithic slab (not conventional), is that the bottom plate, which should be a treated 2x4, must either be drilled to accommodate the anchor bolts (on 3'-0" centers) or you must lap and nail the metal anchor straps that have been placed in the outside edge of the slab. In the article on conventional foundations the discussion of girders, plates, joists, and sub-flooring is the beginning of simple residential wood framing.
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