Preparing the Bathroom Subfloor

Meticulous preparation of the bathroom subfloor is crucial for successful flooring installation and repair. The subfloor serves as the foundation for your new flooring, ensuring stability, durability, and longevity. Neglecting proper subfloor preparation can lead to costly repairs and premature flooring failure.

Inspecting the Subfloor

Begin by thoroughly inspecting the existing subfloor. Look for signs of moisture damage, rot, or unevenness. If any issues are identified, they must be promptly addressed before proceeding with flooring installation.

Water damage can weaken the subfloor and cause mold growth. Rot must be removed and replaced with sound wood. Uneven areas can be leveled using self-leveling compound or a thin-set mortar bed.

Repairing Subfloor Damage

• Remove any sections of subflooring that are damaged beyond repair.
• Install new plywood or backer board to replace the damaged sections, securely fastening them in place.
• Apply a layer of roofing felt or a self-leveling compound over the repaired area to create a smooth and level surface.

Installing Backer Board

Backer board provides additional support and moisture protection for the flooring material. It is typically made of cement board or a waterproof membrane.

• Cut the backer board to fit the subfloor and lay it in place, ensuring a snug fit against the walls.
• Secure the backer board to the subfloor using screws or nails, following the manufacturer’s instructions.
• Fill the joints between the backer board panels with a thin-set mortar or backer board tape.

Leveling the Subfloor

A level subfloor is essential for proper flooring installation. To level the subfloor, use a self-leveling compound or a thin-set mortar bed.

• Pour or spread the leveling compound over the subfloor, following the manufacturer’s instructions.
• Use a trowel or screed to distribute the compound evenly and create a smooth, level surface.
• Allow the leveling compound to cure completely before proceeding with flooring installation.

By following these steps, you can ensure that your bathroom subfloor is properly prepared for flooring installation and repair. A well-prepared subfloor will provide a solid foundation for your new flooring, ensuring a long-lasting and aesthetically pleasing result.