Bathroom & Washroom Mould Removal in Toronto & the GTA
Bathroom mould comes in two very different kinds. Black spots on the caulking and grout are surface growth from steam that never leaves the room. Mould behind the tile, under the tub or inside the wall is a leak, and it is the one that costs money.
We start by testing moisture behind the surfaces so you know which one you have. Surface growth is a cleaning and ventilation job. A hidden leak means opening the wall, drying or replacing what is wet, and rebuilding it properly waterproofed.
Covered by insurance? We bill your insurer directly, so in most cases you pay only your deductible. What your policy covers →
Signs of bathroom mould
- Black spotting on caulking and grout that comes back after cleaning
- Peeling paint or bubbling on the ceiling above the shower
- Loose or cracked tiles, or grout that stays dark
- Soft drywall next to the tub or behind the toilet
- A musty smell that stays after the room has dried out
- Staining on the ceiling of the room below
- An exhaust fan that is noisy, weak or missing
What the job includes
- Moisture testing behind tile, tub surround and walls
- Containment and HEPA filtration where walls are opened
- Removal of affected caulking, drywall, backer board and insulation
- Locating and stopping the leak: supply, drain, valve or failed membrane
- Drying the cavity to a measured standard before closing it
- Checking that the exhaust fan is sized correctly and vents outside, not into the attic
- Rebuild with a proper waterproofing membrane, through our reconstruction team
- Written verification on completion
Who we do this for
- Homeowners
- Condo owners, where a leak can reach the unit below
- Landlords and tenants
- Property managers
When to call us
When it comes back straight after cleaning, when tiles are loose, or when a ceiling below is stained. Those point to water inside the wall rather than on the surface.
Three steps
You call, we pick up
A person answers at any hour. Tell us what you are looking at and we will tell you what to do first.
We attend and stabilise
Usually within 45 minutes. We stop the damage getting worse before anything else happens.
We finish and bill your insurer
Documented daily, completed properly, invoiced to your insurer rather than to you.
What washroom & bathroom mould removal costs you
We bill your insurance company directly. On most covered losses that is the only amount you pay us.
Water damage is the most common home insurance claim in Ontario, and the great majority of the work we do is paid by an insurer rather than by the property owner. We document every loss from the first hour with moisture readings, photographs and a written scope, which is the evidence an adjuster needs to approve the work without argument or delay.
We work with all major Canadian insurers and handle the claim from start to finish, including the adjuster's questions. If you are not insured, or the loss falls outside your policy, we will give you a clear written quote before any work begins and we will tell you honestly what can be dried and saved rather than replaced. Keeping material in place is what keeps the cost down, and it is the first thing we look at.
There is no charge for attending to assess an emergency, and no obligation once we have. What your policy covers →
Who turns up
Delta24 Restoration is a professional restoration contractor serving Toronto and the Greater Toronto Area. Our technicians are certified by the IICRC, the industry standards body for the restoration trade, in Water Damage Restoration (WRT) and Applied Structural Drying (ASD). We are WSIB cleared and carry full commercial general liability insurance. Certificate numbers and a current clearance certificate are provided on request, and property managers and adjusters routinely ask for both before we attend.
We work to the IICRC S500 standard for water damage restoration and the S520 standard for mould remediation. Every job is documented with daily moisture readings, photographs and a written scope, which is why adjusters approve our work without delay.
Asbestos work is carried out to Ontario Regulation 278/05, which sets out the procedures for Type 1, Type 2 and Type 3 operations. Mould work finishes with written post-remediation verification, which is the document a buyer, a lender or an insurer will ask to see.
- IICRC WRT certified technicians
- IICRC ASD certified drying
- WSIB cleared, certificate on request
- Commercial general liability insurance
- Asbestos work to O. Reg. 278/05
- Direct billing with all major Canadian insurers
- Years of insurance claim experience with every major insurer
- Written post-remediation verification on mould work
- Free assessment, no obligation
How the insurance side works
Water damage is the most common home insurance claim in Ontario, and how the claim is handled usually matters more to your bill than the work itself. We document the loss from the first hour: moisture readings, photographs, a written scope, and a daily drying log. That is the evidence an adjuster needs to approve the work without arguing about it.
We bill your insurer directly. In most cases the only money you hand over is your deductible, which on Ontario policies commonly sits between $500 and $2,500.
Which losses are covered depends entirely on where the water came from. A burst pipe or a failed appliance is normally covered under a standard policy. Water coming up through a floor drain is sewer backup, which is almost always a separate endorsement you have to have purchased. Water entering from outside during heavy rain is overland flood, which is another endorsement again. A single storm can produce all three at once, which is why adjusters care so much about the source.
Full guide: is a flooded basement covered by insurance? →
How the claim works, and what your insurer covers →
Common questions
Why does my bathroom keep getting mouldy?
Usually because the steam from showers has nowhere to go. An exhaust fan that is too small, not run long enough, or vented into the attic instead of outside is the most common reason.
Can I clean bathroom mould myself?
Small surface spots on tile, grout and caulking, yes. Mould that keeps returning, covers a large area or is on or behind drywall needs the source found first.
Do you need to remove the tiles?
Only if testing shows moisture behind them. We check before we open anything.
Is it covered by insurance?
A sudden leak from a pipe or valve often is, and the resulting mould can form part of that claim. Gradual seepage and condensation usually are not.
Washroom & Bathroom Mould Removal across the GTA
Pick your area for local detail: what the housing stock is like, why water gets in there, and the neighbourhoods we cover.