DIY: Install Terra Cotta Tile on Concrete Stairs Outside

Inspect the concrete stairs. They should be free of cracks, oil, curing compounds and other foreign matter. Repair and clean the steps before starting work.

Measure the length and width of a step tread (the horizontal part) with a measuring tape. Multiply your measurements together to find the area. Do the same for the length and height of a riser, which is the vertical section of the step. Add the two areas together and multiply by the number of steps to find the total area you need to cover. Add about 20 percent to allow for losses due to cutting tiles to fit to determine how much tile to purchase.

Lay out a line of tiles along the length of a tread, starting at the center. Separate the ties using tile spacers. Adjust the tiles so that there is a roughly equal gap between the tiles at each end and the end of the tread. Measure and mark tiles that need to be cut to fit these end spaces. For risers, lay the tiles out along the bottom of the riser where it meets the back edge of the tread below.

Cut the tiles needed for a step. You can cut all of the tiles at once if you label them so you know where they will be placed. Alternatively, you can cut the tiles as needed.

Mix Portland cement with water in a bucket so that it forms a thick paste. Mix a slurry of Portland cement, i.e, a thinner paste, in another bucket. Starting with the top step, apply a layer of the cement paste three-eights to three-quarters of an inch thick to the riser. Use the slurry to apply a mortar base about 1 1/4 inches thick on the tread.

Allow the cement to set for a few minutes. Use your trowel to apply a thin layer of Portland cement paste to the bottom of each tile and fit it into place. Separate tiles with tile spacers to align them properly. Use a damp rag to wipe away excess cement.

Allow the cement to cure (dry) for 24 hours. Follow the manufacturer’s instructions to mix your grout. Use a grout float to apply the grout and work it into the spaces between tiles. When you are done, wipe away the excess grout with a damp rag.

Wait two to five days, depending on the grout manufacturer’s instructions, for the grout to cure completely. Terra cotta tile needs to be sealed or it will absorb dirt and become stained. Once the tile cement and grout are completely cured, apply tile sealant to protect the tiles.