Deep cleaning
Bathroom grout restoration: DIY vs professional regrouting
When can you bring stained Edmonton bathroom grout back to white at home, and when do you need a regrouting professional? The 4-test triage and what each method actually costs.
TL;DR
Stained but intact grout can be restored with hydrogen peroxide + baking soda + elbow grease in 1-2 hours. Cracked, missing, or mould-penetrated grout needs regrouting ($350-800 per bathroom in Edmonton). The 4-test triage tells you which you're dealing with.
Bathroom grout has two states: dirty-but-fine, or compromised. Cleaning fixes the first; regrouting fixes the second. Knowing which you have saves you 6 hours of futile scrubbing.
The 4-test triage
- Run a fingernail across the grout. If it crumbles → compromised, regrout.
- Look for missing grout (gaps, divots). Even 5mm of missing grout means water is getting behind the tile → regrout.
- Smell the wall after a hot shower. A musty smell means mould has penetrated past the grout surface → regrout.
- Wet the grout. If it stays dark for 30+ minutes, it's absorbed water — grout sealer is gone, restoration is temporary → regrout within 6 months.
DIY restoration recipe (intact grout only)
Mix 3 parts baking soda + 1 part 3% hydrogen peroxide into a paste. Apply with old toothbrush, leave 10 minutes, scrub, rinse. Repeat for stubborn spots. Re-seal with a penetrating grout sealer 24 hours after drying. Lasts 12-18 months in a typical Edmonton bathroom.
When to call a pro
- Any of the 4 triage tests came back positive
- Grout was last replaced more than 10 years ago
- Tile is in a steam shower or high-use family bathroom
- You see efflorescence (white crystalline deposits) — sign of water behind
Regrouting in Edmonton runs $350-800 per bathroom depending on linear footage and whether tiles need re-leveling. Get a quote from a regrouting specialist, not a general handyman — the prep and sealing differ.
Our deep clean includes a grout-restoration pass for tiles that pass the 4-test (cleaning, not regrouting). For move-outs we include it by default — clean grout is a high-leverage item on landlord checklists.
Frequently asked
- Will bleach clean grout?
- Yes but it weakens the grout over time and discolours coloured grouts. We avoid it for that reason; hydrogen peroxide does the same job without the long-term damage.
- Should I re-seal grout after cleaning?
- Yes — sealer wears off after 1-2 years. Re-sealing is a 30-minute job after cleaning, makes the grout actively resist water, and pays back in less future cleaning.
- What about epoxy grout?
- Stain-resistant and waterproof, but more expensive ($800-1500 to regrout a typical bathroom). Worth it for steam showers and high-use family bathrooms with hard water.
- How long should grout last?
- Cement grout (most homes): 10-15 years before regrouting needed. Epoxy grout: 25+ years. Sealer (separate from grout): re-apply every 1-2 years.
Related
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- Move-in / Move-outMove-out cleaning checklist for Alberta renters
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