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How to Regrout Tiles and Refresh a Tired Bathroom
Cracked or stained grout lets water behind tiles. Replacing it is cheaper than retiling and makes a bathroom look new.
Dana Whitlock · Oct 25, 2026 · 6 min read · 4 steps
Grout is the filler between tiles. Over time it cracks, crumbles, or stains, and water can seep behind tiles, loosening them and feeding mould.
Regrouting is a patient but straightforward job.
Tools you need
- A grout rake or oscillating tool with a grout blade
- Grout suited to wet areas (and epoxy for showers if you prefer)
- A rubber grout float
- A damp sponge and bucket
- Safety glasses and a dust mask
Removing old grout
Rake out grout to a depth of about 2–3 mm, working carefully so you do not chip tile edges. Vacuum dust from the joints and wipe with a damp cloth. Let the area dry fully before regrouting.
Applying new grout
Mix grout according to the instructions. Press it diagonally across the joints with the float, filling them completely. After a few minutes, wipe excess off the tiles with a barely damp sponge, then shape joints with a grout tool or rounded stick. Buff off the haze once dry.
Finishing
Leave grout to cure fully before using the shower — often 24 hours or more. A grout sealer can help resist stains. Replace silicone sealant around baths and trays separately; grout cracks if used where surfaces move. See our caulking guide.
This is general home-maintenance information, not professional advice. Building codes, permits, and safe practices vary by location — consult a licensed contractor, electrician, or plumber for work beyond your experience.