Grout is the unsung element of any tiled bathroom — visible in every joint, and prone to cracking, crumbling and discolouration over time. Failed grout isn’t just unsightly; it allows water ingress behind tiles, leading to mould, damp and eventual tile loss. Shazam Repairs carries out professional grout repair and regrouting on bathroom walls, shower enclosures, floors and bath surrounds.
Why Grout Fails
- Age and shrinkage — older grout becomes brittle and shrinks, developing fine cracks at joints
- Movement — slight building movement or substrate flex causes grout to crack, particularly at corners and changes of plane (wall-to-floor, bath-to-wall)
- Moisture cycling — repeated wetting and drying causes expansion and contraction that breaks down grout over time
- Poor original installation — grout applied too thinly, mixed incorrectly or applied to a dusty substrate will fail prematurely
- Cleaning products — acidic or bleach-based cleaners attack cementitious grout and cause surface degradation and staining
Types of Grout Damage We Address
- Cracked grout lines — individual or widespread
- Missing grout — joints where grout has fallen out entirely
- Crumbling grout — where the grout has lost cohesion and powders when touched
- Discoloured grout — dark, stained or patchy grout that cleaning cannot restore
- Mouldy grout — black mould ingrained in porous cementitious grout
Regrouting vs Grout Repair
For isolated failed joints, targeted grout repair (raking out and reapplying in the affected area) is appropriate and cost-effective. For widespread grout failure, full regrouting — removing all existing grout mechanically and reapplying throughout — produces a better, longer-lasting result. We’ll advise on the right approach after assessing your specific situation.
Colour Matching Existing Grout
Where we’re carrying out localised repairs, colour-matching the existing grout is important. We carry a wide range of grout tones and can mix to match most common grout colours, including aged and patinated tones that differ from the original installation colour.
