Renovation guides

How to grout tile and caulk the corners yourself: step by step

The finish pass on all the tile: grout the flat field, silicone every change of plane, seal only where the label says. Simple work with a short window — grout does not wait for you.

Difficulty 2 of 5 · about half a day · you can do this

Photo of your room, the look you pick, then this guide with the materials counted for your room.

Step by step

1. Step 1 of 12

   Confirm the tile is cured and solid

   Check the mortar bag's cure time has passed. Tap across the field with a knuckle listening for hollow spots, and press a few tiles — anything that moves gets pulled and reset before you grout.

2. Step 2 of 12

   Clean the joints out

   Pull every spacer and clip, scrape mortar out of the joints with a grout saw or knife down to a consistent depth, then vacuum. Grout laid over mortar ridges has nothing to hold on to and cracks in a line.

   Ready to grout?

   • Mortar cure time from the bag has fully passed
   • No hollow or moving tiles
   • All spacers and clips out, joints raked clean and vacuumed
   • Right grout for the joint width: sanded at 1/8" and up, unsanded below
   • Changes of plane identified and taped off — they get silicone, not grout
   • Two buckets of clean water and fresh sponges ready

3. Step 3 of 12

   Mix one test batch and measure the water

   Mix to the bag, let it slake, and remix. Write down the water-to-powder ratio and use exactly that for every batch. Grout out of the bucket should hold a soft peak, not run.

4. Step 4 of 12

   Tape off the corners you will caulk

   Run painter's tape along both sides of every change of plane so grout stays out of them. This is faster than digging it out later.

5. Step 5 of 12

   Pack the joints diagonally, in small sections

   Load the float, hold it at about 45 degrees to the surface, and spread diagonally across the joints so you fill instead of skimming over. Work about 20–25 sq ft at a time.

6. Step 6 of 12

   Scrape off the excess with the float on edge

   Tip the float up nearly vertical and sweep diagonally to shear the surplus off the tile face without digging the joints out.

7. Step 7 of 12

   Wait the haze time, then sponge lightly

   Let the grout firm up for the time on the bag — usually 15–30 minutes — then wipe with a barely damp sponge in circles, rinse, wring hard, and make a final straight pass in one direction. Keep the joints level and uniform.

8. Step 8 of 12

   Pull the tape and let the grout set overnight

   Remove the tape while the grout is still soft enough to give a clean edge. Leave the caulk joints empty and let everything sit — silicone goes on dry, clean, dust-free tile.

9. Step 9 of 12

   Silicone every change of plane

   Wall-to-floor, inside corners, tile-to-tub, tile-to-countertop, around the curb and the threshold, and around the valve trim. Cut the tip small at an angle, run one continuous bead pulling the gun toward you, tool it once, and stop.

10. Step 10 of 12

    Clear the haze

    The next day, buff the tile with a dry microfiber cloth. If a film remains, use a grout haze remover per its label — never vinegar or an acid on natural stone.

11. Step 11 of 12

    Seal if — and only if — the label says to

    Cement grout usually wants a penetrating sealer after the full cure time on the bag, which is often several days. Epoxy grout gets nothing. Apply thin, wipe the excess off the tile before it dries, and keep water off the surface for the time the sealer label states.

12. Step 12 of 12

    Final inspection

    Look at the joints in low raking light and run a fingertip along them.

    Quality check

    • Joints uniform in depth and color, no pinholes or low spots
    • No grout anywhere a change of plane meets — those are silicone
    • Silicone beads continuous, even, and bonded on both edges
    • No haze left on the tile face
    • Sealer applied only where the label calls for it
    • Water kept off for the time the grout and caulk labels require

Draft guide written from standard practice, not yet reviewed by a licensed pro. Follow product labels where they differ.

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