How to Install a Tile Backsplash

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Tile backsplashes instantly upgrade the look of any kitchen.

The tile backsplash is such a popular kitchen décor choice that some kitchen professionals such as Sadler Homes and Kitchen Magic only mention various types of tiles when discussing backsplash materials. In fact, there are many other options for a kitchen backsplash, including solid stone, wood and stainless steel, but homeowners most often choose tile because it is:

  • Waterproof
  • Easy to clean
  • DIY-friendly
  • Inexpensive

Moreover, tile offers more design choices than other materials. You can choose ceramic (glazed or unglazed), porcelain, glass or natural stone in sizes that range from 1 inch to 12 inches square, or you can opt for rectangular subway tile or even irregular, multicolored tiles that you can form into a whimsical mosaic tile pattern.

The type of tile you choose doesn't have much bearing on the installation procedure because it's basically the same for all of them. If the backsplash area, which typically encompasses the wall behind the sink and stove extending from the countertops to the bottoms of the upper cabinets, is covered by drywall, you can install the tile directly on that or you can install a cementboard underlayment, which is recommended for tiling over wallpapered walls.

An Overview of the Tiling Procedure

After getting a design strategy clear in your mind, you begin the job by taking careful measurements and purchasing enough tile to cover it. You clean the wall, prepare the outlets and switches and then apply a coat of thinset mortar or tile mastic and lay the tiles in the adhesive. If you prefer, you can purchase self-stick tiles that don't require adhesive so you can skip this somewhat-messy step.

Once the tiles are secure and the adhesive has set, you apply grout and then a sealer to protect the grout and the tiles if the tiles need it. You finish by caulking the edges of the backsplash and applying optional trim, and you're done. The procedure can be completed in a couple of days, but if you're creating an artistic pattern, it may take longer.

Things to Know Before You Start

A tile backsplash typically covers the area between the countertops and upper cabinets, but in some cases, it makes sense to extend the backsplash area beyond the counter. When you do this, it's important to create a stable, temporary bottom edge to hold the tiles in a straight line. You can do so by screwing straight pieces of 1x2 lumber to the wall.

Tiling relatively small, visible areas, such as a backsplash or countertop, calls for a large number of precision cuts, and the score-and-snap tile cutter you use for floor tiles isn't accurate enough. You're better off renting or buying a wet saw. You'll also need a good set of tile nippers to cut curves and notches.

Tiling a backsplash requires a number of precision cuts, so renting a wet saw is ideal.
Image Credit: Valeriy_G/iStock/GettyImages

You'll need plenty of room to work. Clear the countertops and pull large appliances well away from the wall, pulling the plugs and disconnecting the gas if necessary to allow you to make enough room to get behind them. It's a great idea to keep the kitchen out of commission while this home-improvement project is underway if that's at all possible.

Do You Need to Install Cement Backerboard?

When installing ceramic tile on the floor or a countertop, some type of backing material, such as cementboard or an uncoupling membrane, is essential because it provides extra reinforcement and a flat surface that prevents cracking. Builders also use cementboard when tiling walls and ceilings, but because a backsplash doesn't cover the entire wall, it's a special case. Cementboard adds about 1/2 inch of thickness to the tile bed, and that could create problems at the edges of the backsplash where the tiles transition to drywall or other wall materials.

Drywall in good condition can support tile, but it has to be flat and clean, and if it's painted with a shiny finish, the finish must be deglossed to ensure the adhesive will stick to it. Wavy drywall, drywall in bad condition and wallpapered drywall are poor candidates for a tile bed and should be covered with cementboard. You should also use cementboard in high-moisture areas to prevent the moisture from degrading the adhesive and causing the tiles to loosen.

Things You'll Need

  • Sheet plastic

  • Noncontact voltage tester

  • Painters' tape

  • Masking paper

  • Trisodium phosphate (TSP)

  • 120-grit sandpaper

  • Cement backerboard

  • 1 1/2-inch cementboard screws

  • Thinset mortar

  • Fiberglass tape

  • Tile spacers

  • Tile mastic

  • Grout

  • Grout-haze remover

  • Grout and tile sealant

  • Electrical box extenders

  • Tape measure

  • Screwdriver

  • Bucket

  • Sponge

  • Rubber gloves

  • Goggles

  • Knife or circular saw and 80-tooth carbide blade

  • Jigsaw

  • Metal-cutting blade

  • Respirator

  • Trowel

  • Level

  • Wet saw

  • Tile nippers

  • Grout tray

  • Grout float

  • Cheesecloth

How to Install a Tile Backsplash

Step 1: Measure the Backsplash Area and Purchase Tile

Use a tape measure to measure the lengths and widths of all parts of the wall that constitute the backsplash and calculate the area. Divide that by the area of each tile you plan to use to get the number of tiles you need. Add a 10-percent overage to account for cutting waste and mistakes.

Step 2: Cover the Countertops

Clear everything from the countertops, cover them with sheet plastic and tape down the plastic. If you need to mask the cabinets with painters' tape and masking paper, you can do it now, but it's probably better to wait until after you've washed the walls. This is also a good time to move the appliances out of the way and cover them with plastic.

Step 3: Remove Outlet Covers

Turn off the circuit breakers that control the electrical outlets and any lights controlled by switches in the backsplash area and remove all the cover plates with a screwdriver. Test for power inside each box using a noncontact voltage tester to confirm the power is off. Unscrew the outlets and switches from the boxes but don't disconnect them. You can gently pull them out a few inches and leave them sticking out of the boxes, and when the tiling is complete, you'll reattach them using electrical box extenders if necessary to extend the boxes out to the tile surface.

Step 4: Wash and Degloss the Walls

Mix a solution of 1/2-cup trisodium phosphate (TSP) and water in a bucket and use a sponge to wash down the walls. TSP is a strong detergent that dissolves grease, oils and other contaminants that could interfere with the tile adhesive, and it also deglosses shiny finishes. It's caustic, so wear rubber gloves and goggles when using it. Wait for the wall to dry and then scuff by hand with 120-grit sandpaper to etch the finish if it's enamel paint or a similar glossy material.

Clean walls are essential before installing tile.
Image Credit: artursfoto/iStock/GettyImages

Note: Skip this step if you're installing cementboard.

Step 5: Install Cement Backerboard

Cut the cementboard to fit by scoring it with a knife and breaking it or by cutting it with a circular saw and an 80-tooth carbide blade. Use a jigsaw with a metal-cutting blade to cut holes and notches for electrical outlets. Wear goggles and a respirator while cutting with power tools to protect yourself from the cement dust.

Affix the cementboard to the studs by driving 1 1/2-inch cementboard screws into the wall studs. Finish the seams by applying thinset mortar with a trowel, laying fiberglass tape on the mortar and troweling it flat.

Step 6: Plan the Layout of the Tile Backsplash

Choose a good place to lay the first tile, which is typically directly behind the most prominent fixture, such as the sink faucet or the stove, to create a pattern centered around that fixture. It's a good idea to stick tile temporarily to the wall to get an idea of how it will look and to arrange the pattern to avoid having to cut very thin tiles at the edges of the backsplash area. Use tile spacers to keep the tiles a uniform distance from each other and a level to make sure the grout lines are straight and level.

During the layout, be sure to leave a 1/8-inch expansion gap between the backsplash and the countertop, cabinets and any other solid border. Ceramic tile and grout expand and contract with changing temperature and humidity, and the gap is necessary to prevent lifting and cracking. You typically caulk this gap with flexible silicone caulk after laying the tiles, and you can cover it with trim if you want.

Step 7: Lay the Tile

Apply thinset or tile mastic to the wall with a notched trowel and press the tile into the adhesive, giving each tile a little wiggle to seat it. Begin at the center and work toward the edges of the backsplash using tile spacers between adjacent tiles to keep them uniformly separated and the grout lines straight.

Cut tiles as needed using a wet saw for straight cuts and tile nippers to cut curves and small notches. If you have to cut a notch in a tile that fits completely around an electrical box, make a series of straight cuts with the wet saw to create thin strips in the cutout area and then use the nippers to break off the strips. Let the tile adhesive cure fully as directed by the manufacturer.

Step 8: Grout the Tile

Mix powdered tile grout with water to a consistency similar to peanut butter or use premixed grout and put it in a tray. Apply it with a grout float using the float to spread it over the entire backsplash and force it into all the grout lines. Use enough grout to bring the grout lines flush with the tiles or about 1/16 inch below them and then make sweeping motions with the float to remove excess grout.

Let the grout stiffen for about 20 minutes and then wipe off the excess grout that remains with a damp sponge. It's a good idea to tool the grout with your finger while it's still pliable much as you do when caulking to give it a clean, concave surface.

Step 9: Clean the Grout Haze

When the grout dries, a thin film known as grout haze will remain on the tiled surface. You should be able to remove this by rubbing it off with cheesecloth, but if it doesn't come off, use a commercial grout-haze remover according to the instructions that come with the product.

Step 10: Apply Sealer to Grout and Unglazed Tiles

Allow the grout to cure fully (which will take several days) and then seal it with a commercial sealant. If you used unglazed tile, it also needs to be sealed, and in this case, you can seal the tile and grout at the same time (many types of natural stone also need sealer; check with the tile supplier for recommendations). Some sealers come in aerosol cans and can be sprayed, while others must be applied with a brush or rag. Follow the application instructions on the product you purchase.

Step 11: Replace the Electrical Outlets and Switches

Reattach the electrical outlets and switches to their boxes using longer screws if necessary to tighten the tabs on the devices against the tile. In some cases, especially when you install cementboard, you may need electrical box extenders. An extender is a plastic ring that fits against the front edge of the box and extends the box so it is flush with the face of the tile. Screw the extender to the box and then screw the outlet or switch to the extender and attach a cover plate.

Add the cover plates to the outlets and switches. Turn on the circuit breakers to restore power.

references

Chris Deziel is a contractor, builder and general fix-it pro who has been active in the construction trades for 40 years. He has degrees in science and humanities and years of teaching experience. An avid craftsman and musician, Deziel began writing on home improvement topics in 2010. He worked as an expert consultant with eHow Now and Pro Referral -- a Home Depot site. A DIYer by nature, Deziel regularly shares tips and tricks for a better home and garden at Hunker.com.

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