How to Hire a Drywall Contractor (and Avoid the Common Traps)

Why this matters

Drywall is one of the most invisible parts of a renovation when it is done well, and the most visible part when it is done poorly. Bad taping shows up under every paint colour, every lighting condition, every angle of view — and the only fix is to redo the wall. Choosing the right crew matters more than choosing the right paint. Whether you need new drywall installed, existing board taped and finished, or repairs after damage, the questions below should be on every quote conversation.

The 12 questions

1. Are you licensed and insured?

Get a current certificate of insurance for general liability ($2M minimum, $5M better) and confirmation of WSIB registration. Any reputable contractor working in Toronto, Mississauga, or anywhere else in the GTA sends these within an hour of asking. If they hesitate, walk away.

2. Will I get a written, itemized estimate?

Verbal estimates are how disputes start. The estimate should list the scope, the finish level (Level 4 vs Level 5), the board type (1/2", 5/8" Type X, green board), the timeline, and the payment schedule.

3. What finish level are you quoting?

Level 4 is the residential standard. If they cannot articulate the difference between Level 4 and Level 5, that is a red flag — they may not understand the standard at all. See our taping levels post.

4. How many coats of mud?

The right answer is three (tape coat, fill coat, finish coat) for Level 4, plus a skim coat for Level 5. "Two and we sand a lot" is not a real answer. See exactly what is in those coats on our cost breakdown post.

5. What is your warranty?

One year minimum. If a tape lifts, a screw pops, or a corner cracks within twelve months, the contractor should come back and fix it free. Most reputable companies offer this. Get it in writing on the quote.

6. Who is the lead taper on my job?

You want a name and a tenure. The lead taper is the person whose hand is on the knife — and on whose work the wall depends. Ask for someone with at least 5+ years experience.

7. How will you handle dust?

The right answer mentions HEPA-filtered vacuum sanders, zip walls between work area and living space, and daily clean-up. "We use a shop vac" is a wrong answer for occupied homes.

8. What is the payment schedule?

Standard residential is 50% deposit and 50% on completion. Larger jobs can be staged into thirds. Never pay 100% up front. Anyone asking for full payment before work starts is showing you a major red flag.

9. Can I see recent work?

Either references in your area or photos of recent finished work. Most contractors should have both. Ideally, ask to see a finished job, not just an in-progress photo — finishing is what separates good from great.

10. How do you handle changes mid-project?

The right answer involves stopping, documenting, and pricing in writing before continuing. The wrong answer is "we just keep going and add it to the invoice." Surprises at invoicing time are the #1 source of contractor disputes.

11. Do you supply the materials?

You probably want yes. Contractor-supplied materials means you do not coordinate deliveries, you do not store sheets at your house, and the contractor is responsible for any defective board. The cost is built into the quote either way. Spec'ing the right materials is its own decision — see our drywall thickness guide for what board belongs where.

12. What is your timeline?

Get start date, working days, and any expected weather or trade dependencies in writing. "About two weeks" is not a timeline.

Red flags

• Cash-only with a "discount." No paper trail = no warranty enforcement, no insurance backup, no legal recourse.
• Estimate by phone without seeing the site. Real residential estimates need a site visit (or detailed photos for repairs). Phone quotes for installations are guesses.
• Vastly cheapest quote. If three other contractors quoted $8,000 and one quoted $4,500, the cheap one is either underbidding to win and adding charges later, or cutting corners on materials and finish. Run the numbers — drywall has known per-square-foot ranges and outliers are suspicious.
• Pressure to sign today. Real contractors are busy enough that they do not need pressure tactics.
• No written warranty. Verbal warranties are worthless.
• No insurance certificate. If they cannot produce one in writing, they probably do not have it.
• "We do not need permits." For most drywall work this is true (drywall is not a permit-required trade in most municipalities) — but if structural framing or major electrical or plumbing is part of the job, permits may be needed. A contractor who waves off permits casually is one who has been caught short on inspections before.

Green flags

• Returns calls promptly.
• Sends quote in writing within a few days, not weeks.
• Insurance certificate provided proactively.
• Has photos or references in your area.
• Asks more questions than you do — they want to scope the job properly.
• Comfortable explaining the difference between Level 4 and Level 5.
• Does not push you to upsize the job.

One last tip

Pay the slight premium for the contractor whose quote was clearest, who answered your questions thoroughly, and whose previous work you can verify. The "cheapest quote" is rarely the cheapest project — overruns, redoes, and warranty disputes erase the savings within weeks. If you would like to test these questions on us, request a free written quote — we are happy to answer all 12 in writing.

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