Water Damage Restoration & Mould Removal in Markham
Markham runs from heritage homes on Main Street Unionville to new builds off Major Mackenzie, and they flood very differently.
Markham is mostly 1990s onward subdivision housing with deep finished basements, alongside the heritage core of Unionville and Markham Village.
Sump pump failure is the most common cause in the newer subdivisions, where basements sit below the water table and depend entirely on the pump. The heritage core has the opposite problem: old drains and stone foundations.
Where we work in Markham
We cover the whole of Markham, including Unionville, Milliken Mills, Thornhill, Cornell and every neighbourhood in between. Postal areas L3P, L3R, L3S, L3T, L6B, L6C and others.
Full neighbourhood list (16)
Services we run in Markham
Every one of our 25 services is available here, any hour.
What to do before we arrive
- Stay out of the water if it is near outlets or the panel. Call Toronto Hydro: 416-542-8000
- If you smell gas, get out first, then call. Enbridge: 1-866-763-5427
- Sewage coming up? Stop using toilets and sinks, and report it on 311.
- Take photos before you move anything.
Who turns up in Markham
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 do Markham basements depend on the sump pump?
Much of the newer subdivision housing has basements below the local water table, with a weeping tile system feeding a sump pit. If the pump fails or the power goes out during a storm, water has nowhere to go.
Do you serve Unionville and the heritage homes?
Yes. Older Unionville properties need a different approach, particularly around stone and rubble foundations, and we treat them accordingly.
My basement is flooded. What should I do first?
Stay out of the water if it is near outlets, appliances or the electrical panel, and have the power cut first. If you smell gas, leave the house before calling. Photograph everything before you move it, and do not start pulling up carpet or cutting drywall until the loss is documented.
What will flooded basement cleanup cost me?
If the loss is covered, usually just your deductible. We bill your insurer directly and deal with the adjuster on your behalf. For uninsured work we provide a written quote before we start, and the fastest way to keep the cost down is to call early, because material that is dried in place does not have to be replaced.
Is a flooded basement covered by insurance?
It depends on the source. A burst pipe or failed appliance is normally covered. Water coming up through a floor drain is sewer backup, which is almost always a separate endorsement. Water entering from outside during heavy rain is overland flood, which is another endorsement again.