How To Add Wall To Existing Room Concrete Slab

Exterior wall on slab must be out on the edge an exterior wall must be placed on the outside edge of the slab so the exterior siding laps down and over the edge of the slab.

How to add wall to existing room concrete slab.

Apply the new concrete over the primer. First ensure the existing wall to which the new one will attach at a 90 degree angle has a stud immediately behind the new wall location. Step 1 stretch a tape measure across the concrete slab and mark the position of the wall s ends. Run a chalk snap line between the marks and snap the line against the slab to lay out the position of one of the wall s sides.

If this is the case drill through the curb and into the slab with a roto hammer every few feet. Then fill the holes in the slab with hydraulic cement. The framing currently sits on an untreated 2x4 wooden sill plate. Your local building code may call for the wall to be anchored to the slab with threaded rods.

I m considering either a replacing the 2x4 sill with a pressure treated 2x4 sill or. Next check for joists running above the new wall. Pour concrete onto the existing slab until it is around where you want the final level to be. Make sure you have enough concrete to fill the entire area to the depth you desire.

Sketch the new design in place if possible fine tune the design and then finalize the plan. In order to add a bathroom to a house on a concrete slab you will need to locate the existing water supply and waste lines. I currently have a garage built upon an existing concrete slab i believe a plain 4 slab no foundation wall at the edges. Add all of the concrete right away so none of the mixture has a chance to dry out.