Building A Subfloor On Uneven Concrete

Alternate subfloor system use a minimum 3 4 inch cd exposure 1 plywood sheathing 4 foot by 8 foot sheets.

Building a subfloor on uneven concrete. One of the simplest options is a sleeper based subfloor. You have a few options. The result is a subfloor that protects finished flooring from cold and damp concrete based floors. Fixing an uneven floor is just more than leveling.

As a result the material for the subfloor will acclimate to the temperature and moisture content of the room expanding or contracting before the installation rather than after. In a perfect world all the old flooring and subflooring would be removed and have everything leveled with a brand new subflooring surface. You need more planning that you may expect. You need a dry clean and flat surface before you can install finished flooring in a room built on a concrete slab.

It is best to lay the flooring plastic side down directly onto the cement floor. One of the main reasons for installing a sleeper system subfloor is to deal with un eveness of the concrete slab. Grind the floor use a self leveling compound or use a subfloor to get it pretty close to even as possible. Begin by cutting sheets to 16 inches by 8 feet or smaller panels marked 3 8 of an inch deep on back and a minimum of every 12 inches across in width.

There are many reasons that a floor surface or subflooring can be uneven. I have listed a couple of forgiving flooring materials carpet and vinyl to use over uneven concrete floors. The most common reasons are either a basement or other concrete based surfaces or a remodel that has various levels of subflooring.