Building A Subfloor On Uneven Concrete

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.

Building a subfloor on uneven concrete.

It is best to lay the flooring plastic side down directly onto the cement floor. In a perfect world all the old flooring and subflooring would be removed and have everything leveled with a brand new subflooring surface. The result is a subfloor that protects finished flooring from cold and damp concrete based floors. How to fix an uneven subfloor city floor supply decking sub floor over concrete paving you installing plywood flooring over concrete theplywood leveling a floor 8 top tips to keep in mind bob vila installing plywood flooring over concrete theplywood subfloor over uneven concrete floor diy.

One of the main reasons for installing a sleeper system subfloor is to deal with un eveness of the concrete slab. There are many reasons that a floor surface or subflooring can be uneven. 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. The most common reasons are either a basement or other concrete based surfaces or a remodel that has various levels of subflooring.

Grind the floor use a self leveling compound or use a subfloor to get it pretty close to even as possible. A good carpenter will install sleepers using shims and once the sleepers are in place and leveled you can install the plywood overtop. Alternate subfloor system use a minimum 3 4 inch cd exposure 1 plywood sheathing 4 foot by 8 foot sheets. You need more planning that you may expect.

One of the simplest options is a sleeper based subfloor. You need a dry clean and flat surface before you can install finished flooring in a room built on a concrete slab. Fixing an uneven floor is just more than leveling.