How to Choose a Stucco Contractor in Toronto: 7 Things to Check Before You Sign

1. Confirm They Carry WSIB and Commercial Liability Insurance — and Get the Certificates

This is the first and most important check. If a worker is injured on your property and the contractor is not WSIB-compliant, you as the homeowner can be held financially responsible. If the contractor causes damage to your property and carries no liability insurance, you have no recourse.

What to ask for:

• Current WSIB Certificate of Clearance (not a verbal confirmation — the actual document)
• Certificate of Insurance showing commercial general liability coverage, ideally $2M minimum for residential, $5M for anything commercial

Reputable contractors provide these without hesitation. Any contractor who resists, delays, or provides documents that don’t show current validity should be disqualified immediately regardless of their price.

Alasya Construction carries full WSIB and $5M commercial liability insurance. Certificates are available within 24 hours of request on any project.

2. Ask for the Specific Materials They’re Using — Not Just “Stucco”

“Stucco” is not a material specification. EIFS systems vary significantly in quality between manufacturers, and the product used determines how the installation performs over 30 years of Toronto weather.

What to ask:

• What EIFS or stucco system are you specifying? (brand and product line)
• What thickness of EPS foam are you using?
• What finish coat product are you using?
• Are you a certified applicator for these products?

Established contractors in the GTA work with named systems — DuRock Alfacing, Durabond, STO, Parex, Dryvit. These manufacturers have specific installation requirements and certifications for applicators. A quote that says “stucco with 2-inch foam” without naming the product is an unspecified quote that cannot be meaningfully compared to one that specifies DuRock RS 100 over R-10 EPS.

Alasya Construction is a certified applicator for DuRock Alfacing, Durabond, and STO systems. We specify every material by product name in our written quotes.

3. Get a Written Quote — Not a Verbal Estimate

A verbal estimate is not a contract and provides no protection if the final invoice looks different from what was discussed. A professional contractor in the GTA will provide a written quote that includes:

• Scope of work in specific detail Materials named (not generic)
• Labour and materials priced separately or as a clear total
• Timeline with start and completion dates
• Payment schedule tied to milestones
• Warranty terms and conditions

If you’re receiving verbal quotes or one-page handwritten quotes for a $50,000 project, you’re working with a contractor who either isn’t experienced with projects of that scale or doesn’t want to be held to what they’ve told you.

4. Check That Flashing Is in the Scope — Explicitly

Flashing is what separates a stucco installation that lasts 30 years from one that fails in 5. Every horizontal transition — window sills, shelf angles, the top of a veneer section, ledge stones — must be properly flashed to direct water away from the wall.

Most Toronto stucco failures that we assess and repair come down to one root cause: inadequate or missing flashing at horizontal transitions. Water pools on the horizontal surface, freezes, and levers the cladding away from the wall over multiple seasons.

What to ask:

• What is your approach to flashing at windows and horizontal transitions?
• Is flashing material included in the quote?
• Who is responsible for integrating flashing with the window installation?

If a contractor dismisses this question or tells you flashing isn’t necessary, end the conversation.

5. Ask About Their Substrate Assessment Process

What a contractor does before they start work is often more important than what they do during it. The condition of your existing substrate — the wall behind whatever is currently on your house — determines the appropriate preparation scope and ultimately the performance of the new cladding.

What to ask:

• How do you assess the existing substrate before starting?
• What happens if you find substrate damage after work begins?
• What is your process for repairs if the existing wall surface isn’t in the condition expected?

A contractor who starts work without a documented substrate assessment is taking on risk they will likely transfer to you if problems are found mid-project.

6. Look at Their Actual Work — Not Just Photos

Marketing photos can misrepresent quality. Before committing to a contractor, ask for references from completed projects, particularly those at least 2–3 years old. A stucco job that’s two winters old in Toronto has been tested. Ask previous clients specifically:

• Did the work stay under budget and on schedule?
• Have any cracking or water issues appeared since completion?
• Was the site clean and protected during work?
• Would you hire them again?

If the contractor can’t provide references from completed work, that’s a significant concern. On larger projects, ask to visit a completed project site — not just see photos.

7. Be Cautious of the Lowest Price

The stucco trade in Toronto has a significant number of operators who compete primarily on price and compensate by cutting material quality, skipping substrate preparation, applying undersized foam, or missing flashing details. These savings are invisible at the time of installation and become visible at year two or three.

An EIFS installation that costs $15/sq ft when the realistic market rate is $22–$35/sq ft is not a deal — it is a project that has cut something. It may be the foam thickness, the material quality, the number of base coat layers, the flashing scope, or the substrate preparation. The apparent saving will typically cost more to remediate than the original price difference.

Price should be the final consideration, not the first. Confirm WSIB, insurance, material specification, written scope, and flashing approach first. Then compare prices among contractors who have passed all five checks.

Learn what stucco installation costs in Toronto: Stucco Cost Guide Toronto

Get a written estimate from a certified contractor: Contact us