How To Level Osb Subfloor For Laminate

How to Level OSB Subfloor for Laminate

OSB (oriented strand board) is a commonly used subflooring material that provides a stable and sturdy base for flooring. However, OSB subfloors can sometimes be uneven or warped, which can make it difficult to install laminate flooring properly. If you're planning to install laminate flooring over OSB subflooring, it's essential to level it first to ensure a smooth and even surface.

### Inspect the Subfloor

Before you begin leveling the subfloor, it's important to inspect it carefully for any damage or irregularities. Look for any loose or damaged boards, as well as any gaps or bumps in the surface. If you find any damaged boards, they should be replaced before leveling the subfloor.

### Identify High and Low Spots

To identify the high and low spots in the subfloor, use a straight edge or level and place it along the surface. Any areas where the straight edge or level doesn't make contact with the subfloor indicate high spots. Areas where there is a gap between the straight edge or level and the subfloor indicate low spots.

### Shim High Spots

High spots in the subfloor can be shimmed up to level them. Shims are thin pieces of wood or plastic that are inserted between the subfloor and the joists below. To shim a high spot, place a shim under the high spot and tap it into place with a hammer. Continue adding shims until the high spot is level with the rest of the subfloor.

### Fill Low Spots

Low spots in the subfloor can be filled with a leveling compound. Leveling compound is a self-leveling material that will flow into low spots and create a smooth, even surface. To fill a low spot, mix the leveling compound according to the manufacturer's instructions and pour it into the low spot. Use a trowel or spatula to spread the leveling compound evenly and allow it to dry completely.

### Sand and Vacuum

Once the high spots have been shimmed and the low spots have been filled, the entire subfloor should be sanded smooth. This will remove any rough edges or bumps that could interfere with the installation of the laminate flooring. After sanding, vacuum the subfloor thoroughly to remove any dust or debris.

### Check for Level

To ensure that the subfloor is level, use a level or straight edge to check it in several different areas. Make sure that there are no high or low spots that could affect the installation of the laminate flooring.

### Conclusion

Leveling an OSB subfloor is a relatively simple process that can be done by most do-it-yourselfers. By following these steps, you can ensure that your laminate flooring is installed on a smooth, even surface that will provide years of enjoyment.