Drywall Mould Removal in Toronto & the GTA
Drywall is gypsum wrapped in paper, and the paper is food for mould. Once growth is in the paper or the drywall has been wet through, it cannot be cleaned reliably. It has to be cut out.
What you see on the face is usually the smaller part. The back of the board, the insulation in the cavity and the bottom plate are where water sits, so we open the wall past the visible growth and check the cavity before anything is closed up.
Covered by insurance? We bill your insurer directly, so in most cases you pay only your deductible. What your policy covers →
Signs of mould in drywall
- Spotting or discolouration that comes back through paint
- Soft, crumbling or bubbling drywall
- Staining along the bottom of walls after a flood
- Bulging or peeling tape joints
- A musty smell concentrated along one wall
- Wet insulation found when a hole is made
What the job includes
- Moisture mapping to find how far the water travelled
- Containment with plastic sheeting and negative air
- Cutting out affected drywall with a margin past the growth
- Removal of wet insulation from the cavity
- HEPA vacuuming and cleaning of studs and plates
- Drying to a measured standard before rebuilding
- New drywall, tape, mud and paint through our reconstruction team
- Written verification on completion
Who we do this for
- Homeowners after a flood or leak
- Basement renovations that went wrong
- Landlords
- Commercial and office tenants
When to call us
If drywall has been wet for more than a day or two, or if spots are coming back through the paint. Both mean the growth is in the board, not on it.
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 drywall 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
Can I just paint over mould on drywall?
No. Paint, including mould-resistant paint, covers it without killing what is in the paper. It comes back through.
How much drywall has to come out?
Enough to get past the growth and the wet material, which moisture readings tell us. After a flood the usual approach is a straight cut above the water line.
Can wet drywall be dried instead of replaced?
Clean water caught quickly, yes, often. Drywall that has grown mould, or was soaked with sewage or flood water, should be replaced.
Do you rebuild the wall?
Yes. Our reconstruction team closes it up once the cavity is confirmed dry, so you deal with one company.
Drywall 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.