How To Build An Exterior Wall On Concrete Slab

Learn how to build a low wall from concrete breezeblocks.

How to build an exterior wall on concrete slab. Use a hammer drill with 3 16 masonry bit to drill a hole through the wood and into the concrete floor. Use an impact driver to drive a 3 tapcon screw through the wood and into the floor. The bulk of the work for a new slab is in the excavation and form building. Then figure on spending a day building the forms and another pouring the slab.

How to pour a concrete slab. 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. To lay new concrete sweep and clean the old concrete and saturate the old concrete with water. Width will work with a 2 4 wall on top.

Then build a perimeter or a wood brace that is the same height as you want the concrete to be. Make sure the braces are level and lay down a barrier of wire mesh over the existing concrete inside of the barrier. Exterior wall on slab must be out on the edge. Your local building code may call for the wall to be anchored to the slab with threaded rods.

Repeat at the other end of the board. 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. These lintels are available in lengths up to 10 ft. Consider a wood shed floor treated lumber joists and plywood.

Cut pressure treated 2 x 4 boards to length and lay them along the chalk line. This prevents water from leaking under the bottom of the wall to the inside of the building. With simple materials and readily available tools the novice carpenter can lay out build and anchor walls on concrete slabs. Walls are built from the ground up.

Step 1 stretch a tape measure across the concrete slab and mark the position of the wall s ends.