Subfloor leveling & prep
Detailed Description
The Flooring You Want for Your Toronto & GTA Home Starts Underneath It
New flooring is one of the most visible and impactful updates a Toronto & GTA home can have — but it’s also one of the most dependent on what’s underneath it. Tile over a bouncy subfloor cracks. Hardwood over a damp subfloor buckles. Laminate over an uneven surface develops squeaks, gaps, and joint separation within the first year. In Toronto & GTA homes, subfloor problems are extremely common — and almost always discoverable before the new flooring goes down, when the cost of addressing them is a fraction of what it costs to tear up a finished floor to fix them after the fact.
At CNG Contracting, subfloor leveling and preparation in Toronto & GTA is how we ensure every flooring installation we do performs the way it’s supposed to. We assess the existing subfloor, identify what needs to be addressed — level, moisture, structural integrity — and prepare the surface properly before any finish material goes down.
What Proper Subfloor Preparation Involves in Toronto & GTA Homes
- Level Assessment: We check the entire subfloor for high and low spots using proper leveling tools. Industry standard for most flooring materials in Toronto & GTA is no more than 3mm variation over 1.8 metres — deviations beyond this need to be addressed.
- Self-Leveling Compound: Low spots and uneven areas are filled with professional-grade self-leveling compound that cures hard and flat — not flexible caulk or filler that compresses under load.
- High Spot Reduction: Localized high spots are ground or planed flat — they can’t be leveled over without creating a different problem.
- Moisture Testing: In Toronto & GTA basements and concrete subfloors, moisture testing before any flooring installation is non-negotiable. High moisture readings mean the material and adhesive selection needs to change.
- Structural Issues: Squeaking, bouncy, or structurally compromised subfloor panels in Toronto & GTA homes are identified and addressed — not covered over.
When Toronto & GTA Homeowners Need Subfloor Preparation
- Before any tile installation — tile is the least forgiving flooring for subfloor imperfections
- Before hardwood or engineered flooring over concrete in Toronto & GTA basements
- Older Toronto & GTA homes where subfloor settlement has created significant level variation
- Post-renovation subfloors where multiple tradespeople have left uneven patches
- Any situation where squeaking, bouncing, or deflection is present before new flooring
A properly prepared subfloor in your Toronto & GTA home is invisible when it’s done — but every flooring installer and homeowner who’s skipped it knows exactly what it costs to fix later. Book your assessment today.
Service Details
| Includes | Level assessment, moisture testing, self-leveling where needed, structural check |
| Time on site | Half day to full day depending on area and preparation needed |
| Warranty | 2 years on workmanship |
| Licensed & insured | Yes |
| Service area | Toronto & GTA and surrounding GTA |
Frequently Asked — Subfloor Preparation in Toronto & GTA
How uneven is too uneven for new flooring in Toronto & GTA without leveling?
The standard for most finish flooring materials is 3mm over 1.8 metres. Tile is more demanding — often 3mm over 3 metres. We measure your Toronto & GTA subfloor and tell you exactly what needs addressing for your specific intended flooring material.
Does concrete subfloor always need moisture testing in Toronto & GTA?
Yes — always, before any wood-based or glue-down flooring over concrete. Toronto & GTA basements and slabs can have elevated moisture that isn’t visible on the surface but destroys adhesive bonds and causes wood-based flooring to fail. Testing takes minutes and changes the entire installation plan when results are high.
How do I book subfloor preparation in Toronto & GTA?
Book online in under two minutes. Our Toronto & GTA team contacts you directly to confirm scope and schedule.
Subfloor preparation reports for Toronto & GTA homes include a written summary of what was found and what was done — useful documentation for renovation permit records and for conveying to subsequent flooring contractors the state of the subfloor they’ll be working over.
Why is a Technical Visit necessary?
Modern "click-lock" vinyl and laminate floors have strict tolerance requirements (usually less than 3/16" variance over 10 feet). If the subfloor isn't flat, the locking mechanisms will break, voiding your warranty. Our Subfloor Leveling & Preparation assessment uses laser levels to map the highs and lows of your room, determining whether we need to grind down high spots or pour self-leveling compound to fill the dips.
SCHEDULE AN INSPECTION
Request your technical visit.
Tell us what you need and a certified specialist will visit you to evaluate your project and give you a real quote the same day.
WHY DO I NEED A TECHNICAL VISIT?
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1Real diagnosis in your home. A technician evaluates materials, measurements, access, and local regulations.
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2The visit cost is discounted from the project. The fee is fully credited to your final invoice once you approve the quote.
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3No commitment if you don’t approve the quote. If you don’t accept the quote after the visit, there is no obligation to proceed.
- Certified technicians — licensed & insured
- Real quote — same day as the visit
- No surprises — no hidden costs
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