How To Level A Concrete Floor This Old House

Assign a person to each jack and raise the jacks slowly and at the same time until the spirit level shows the house is level.

How to level a concrete floor this old house.

Whether you want to refinish an uneven basement floor or replace or add new flooring on top of an existing concrete floor somewhere in your home you most likely will need to level the concrete floor. To resurface an uneven concrete slab begin by laying a long straight 2x4 wooden rail across the concrete slab floor with one end positioned on the high point in the room. Shallower holes need a sand mix. Neglecting to prepare the old surface will prevent the new concrete from adhering correctly resulting in a weak bond between the two layers.

You can level an existing concrete floor with a leveling layer of new concrete but you must prepare the old concrete floor first. You have to prep the edges correctly and use the right materials. Place heavy duty floor jacks under the low spots. Holes 1 inch or deeper require a concrete mix with coarse crushed stone aggregate which bonds well with existing concrete.

Simply pouring wet concrete into a hole in your driveway sidewalk or basement floor won t make for a lasting repair.