Installing a backsplash is one of the most popular ways to update the look of a kitchen or bathroom. If you already have an existing backsplash, you may be wondering if you can simply install new tile right over the old tile. The answer is yes, in many cases, you can tile over existing tile. However, there are some important considerations to keep in mind.
What to Consider Before Tiling Over Existing Tile
Before deciding to tile over an existing backsplash, assess the current state of the tile and what’s underneath it:
Condition of Existing Tile
- Is the existing tile in good shape with no cracks, damage, or loose tiles? Any compromised areas need repairs before tiling over.
- Is the existing tile well adhered? Check by tapping on tiles – they shouldn’t sound hollow. Poorly bonded tiles need to be removed.
- Does the existing tile have a glossy or sealed surface? This needs to be sanded and roughed up for the new thinset to bond properly.
What’s Under the Existing Tile?
- Is there a moisture issue behind the tile? Signs include discolored or damaged grout. Address any leaks before retiling.
- What was used as the backer board? Cement, drywall, wood? It needs to provide a stable base for new tile.
- Is the wall flat and even? Any bumps or uneven areas will show under new tile.
Type of New Tile
- Heavy stone, glass tile, and large format tile may require a complete tear out and new backer board.
- Is the new tile similar in size and thickness? Large differences in tile sizes make it hard to blend evenly.
As long as the existing tile is in good shape, well bonded, and provides a smooth, stable base, in most cases you can successfully install new tile right over it.
How to Prepare the Surface
Proper prep is crucial for a long-lasting installation. Here are the key steps:
- Clean thoroughly – Use a degreasing cleaner to remove all dirt, oil, and soap residue from existing tile. Rinse and let dry completely.
- Sand the glaze – For glossy or ceramic tile, sand with 60-80 grit sandpaper to rough up the surface for better thinset adhesion.
- Check for loose tiles – Tap on all tiles and re-adhere any that sound hollow. Inject thinset under loose tiles and press back into place.
- Fill any grout lines or uneven areas – Use a screening and patching compound to fill any wide grout lines and smooth over uneven areas.
Proper prep removes any barriers and creates the right profile for thinset mortar to bond successfully to the tile.
How to Install New Tile Over Existing
Follow standard tiling techniques, keeping these tips in mind:
- Use a polymer-modified thinset mortar suitable for large format tile. This will bond better than regular thinset.
- Apply a heavy, even layer of thinset with the flat side of the trowel. Use the notched side to comb ridges into the mortar.
- Use a beating motion to firmly press tiles into the thinset. Check for proper coverage by lifting a tile periodically.
- Use latex or epoxy grout for maximum durability and stain resistance with natural stone or ceramic tile.
- Look for thin-profile trims and transition pieces to match the height of the new tile over the existing.
- Expect a slightly raised profile over countertops or sinks. Use a pencil liner trim for a clean finish.
With proper prep and materials, tiling over an existing backsplash can save time and money compared to a complete tear out.
FAQs About Tiling Over Existing Tile
Can you put tile over existing tile in a shower?
Yes, if the existing tiles are in excellent condition with no damage or hollow areas. Use a waterproofing membrane over the tiles and extra care waterproofing at penetrations.
Should you put backer board over existing tile?
Usually backer board is not needed. As long as the tile is well-bonded and provides a flat surface, you can thinset directly onto it.
What thinset is best for tiling over tile?
A polymer-modified thinset specifically formulated for large format tile provides maximum adhesion and flexibility.
Can you put marble tile over ceramic?
Yes, natural stone tiles like marble can be installed over properly prepared ceramic. Be sure to roughen the glazed surface and use the right adhesive.
How do you prep tile for new tile?
Clean thoroughly with a degreaser, sand glossy surfaces, fill uneven areas, check for hollow tiles, and repair as needed to create a flat, stable surface.
Can you put peel and stick tile over existing backsplash?
Yes, peel and stick tiles can be applied over existing tile if the surface is properly prepared and smooth. Be sure to follow the manufacturer’s instructions.
Conclusion
Installing new tile over an existing backsplash or shower surround can save time and money compared to a full tear-out remodel. With proper assessment of the existing tile condition, surface prep, and use of quality setting materials, tile can be successfully installed over tile. Pay close attention to cleaning, creating a roughened surface, evening out the substrate, and using polymer-modified thinset and grout. The end result can be a brand new backsplash or shower surround without the mess and effort of demolishing the existing one.