Assess the Existing Countertop
First, examine the existing laminate countertop to determine if it is suitable for tiling. Look for:
- Damage, warping, or delamination of the laminate surface. Severe issues will require countertop replacement.
- Evidence of moisture damage or leaks underneath. Fix any plumbing issues before tiling.
- A sturdy underlayment under the laminate that will provide a sound base. Plywood or OSB are best. Particleboard may not be suitable.
- A smooth, level surface. Use spackle or self-leveling compound if needed to fill any dips or seams.
If the countertop is in good condition, tiling over it is possible. Just ensure the laminate is well-adhered and robust enough to support the tile.
Clean and Prepare the Surface
Thoroughly clean the existing laminate with an all-purpose cleaner or denatured alcohol to remove grease, wax, and residues. Lightly sand the surface to aid adhesion. Then apply painter’s tape around the edges to protect the walls.
Add the Underlayment
Cement backerboard provides the best underlayment for a tile substrate. Measure and cut boards to size using a utility knife. Apply thinset mortar to the countertop and lay backerboard pieces, pressing firmly into the thinset. Stagger the seams in a brickwork pattern. Fill gaps with thinset and tape over seams. Allow to dry completely.
Optionally, you can use plywood underlayment for a cheaper alternative if your counter is perfectly smooth and level. Follow similar installation steps as above.
Lay the Tile
Begin applying thinset mortar with a notched trowel to a small section of the countertop at a time. Push the tiles firmly into the thinset, twisting slightly, and use spacers for even grout lines. Make sure tiles align evenly and are level across the surface. Allow the thinset to cure fully before grouting.
Take extra care near edges and corners. Bullnose tiles help finish edges nicely. Cut border tiles to fit using a wet saw or tile cutter.
Grout and Seal the Tile
Mix grout according to package directions and apply over the tiles using a rubber grout float. Push grout firmly into joints and clean excess grout off the tiles. Once dry, seal the grout and tiles with a penetrating sealer to protect from moisture and stains.
Let the grout and sealant cure fully before using the newly tiled countertop. With proper prep and care, it can last for many years. Retiling over laminate is an affordable way to refresh the look of a countertop without full replacement.
Frequently Asked Questions
Can I tile directly over laminate countertops?
No, laminate alone is too thin and flexible to support tile. You must first add a cement board or plywood underlayment over the laminate to create a stable surface.
What thinset mortar should I use?
Use a polymer-modified thinset specifically formulated for wall and countertop applications. It will provide a stronger bond and more flexibility.
How do I cut the cement backerboard cleanly?
Mark lines with a straightedge and score with a utility knife using several passes. Snap the board backwards along the cut line to get a clean edge. A power saw with a cement board blade also works well.
Should I take any special precautions for the sink and stove areas?
Yes, use a flexible caulk gap when tiling near sinks or range cooktops. This allows independent movement and prevents cracking.
Can I use large format tiles?
Tiles larger than 12 inches may not adhere well, especially for a first-time DIYer. Mosaics, 4-inch tiles or smaller are best for home use on countertops.
How long should I wait before using the newly tiled countertop?
Allow the mortar, grout, and sealer to cure fully for at least 72 hours before regular use of the countertop. Avoid heavy impact for 2 weeks.
Conclusion
Tiling over existing laminate countertops can upgrade your kitchen or bath on a budget. With proper prep and planning, a durable and beautiful tile installation is possible without ripping out the entire countertop. Just take care to create a sound underlayment, use quality setting materials, allow proper curing time, and make sure to seal the grout and tiles. With some patience and handy skills, you can achieve a custom tiled look over laminate.
