How To Level Concrete Slab Against A Wall

Have a helper add or remove concrete in front of the screed as you pull it.

How to level concrete slab against a wall.

Exterior wall on slab must be out on the edge. This prevents water from leaking under the bottom of the wall to the inside of the building. You can level an existing concrete floor with a leveling layer of new concrete but you must prepare the old concrete floor first. Neglecting to prepare the old surface will prevent the new concrete from adhering correctly resulting in a weak bond between the two layers.

Over time concrete floors can settle unevenly or become uneven due to cracking and moisture. Drag a straight 2x4 screed board across the top of the concrete forms to level the concrete. An even concrete slab is very important if you plan to build anything on your slab or lay down any type of outdoor tile. You can purchase concrete leveling compounds at home improvement retailers to level out the floor.

Make multiple passes if needed to create a flat evenly filled area. 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. Uneven exterior concrete slabs should be repaired for reasons of both convenience and safety. Pour and level the concrete.

Make sure you have enough concrete to fill the entire area to the depth you desire. Consider a wood shed floor treated lumber joists and plywood.