Cracked shower grout
/01Why grout cracks
Grout cracks for three main reasons: building movement (especially in corners, where rigid grout should never have been used), age (cement grout dries, shrinks and powders over years), and poor original installation — joints under-filled or mixed too wet never reach full strength.
/02Cosmetic crack or leak risk?
A hairline crack high on a wall may be cosmetic for now. Cracks at the wall-to-floor junction, around the hob or anywhere water pools are leak pathways — that's where water reaches the substrate and framing. Mould that returns quickly after cleaning is your early warning that moisture is sitting inside the joint.
/03Patch vs proper removal
Smearing new grout or sealer over a cracked joint bonds to a surface that's already failing — it peels, and the crack returns within months. The fix that lasts is grinding the affected grout back to a clean, solid edge and rebuilding the joint. That's the core of proper grout repair — and it's usually a one-day job.
/04Stopping it happening again
Rebuilt joints last when movement joints get flexible silicone instead of grout, the right grout is matched to the joint width, and the bathroom stays ventilated. Every cracked-grout repair from Mr. Regrout comes with a fixed written quote and a 5-year waterproof warranty.
Rather have a specialist just fix it?
Free inspections anywhere in Melbourne, fixed written quotes, and most jobs done in a single day — backed by a written 5-year waterproof warranty.