Before signing a contract or handing over a deposit for a concrete flooring project—whether for an industrial facility, commercial space, or residential property—asking the right technical and operational questions is essential. Concrete preparation, leveling, and resinous or polished finishes require specialized engineering and strict quality control.
To protect your budget, timeline, and property, here are the 10 most critical questions you should ask a concrete flooring contractor before signing on the dotted line.
1. How Will You Mechanically Prepare the Concrete Substrate?
A new finish is only as durable as the surface underneath it. Simply washing, acid-etching, or lightly hand-sanding a slab is insufficient for commercial-grade adhesion.
- What to look for: The contractor should specify mechanical profiling methods—such as shot blasting, scarifying, or planetary diamond grinding during Surface Preparation—to achieve a specific International Concrete Repair Institute (ICRI) Concrete Surface Profile (CSP) rating matched to your flooring system.
2. Will You Perform Quantitative Moisture Vapor Testing Before Installation?
Moisture trapped within a concrete slab exerts hydrostatic pressure that can cause osmotic blistering, delamination, and coating failure.
- What to look for: The contractor must perform standardized testing, such as ASTM F2170 (in-situ relative humidity probes) or ASTM F1869 (calcium chloride testing). If moisture exceeds safe levels, they should include a dedicated moisture mitigation primer in the contract.
3. How Do You Plan to Fix Existing Subfloor Imperfections and Leveling Issues?
Coatings and polished finishes do not hide deep cracks, spalling, or uneven slabs; in fact, they often highlight them.
- What to look for: Ask how they handle structural crack repairs, expansion joints, and slab levelness. Look for expertise in precision remediation using self-leveling underlayments via Floor Leveling & Floor Flattening to ensure a flat foundation before topcoat application.
4. Are You a Certified Applicator for the Specified Flooring System?
Many high-performance material manufacturers restrict their product warranties to installations performed by certified applicators.
- What to look for: Confirm whether their technicians hold certified applicator status for specialized chemistries, such as high-build Epoxy Coatings & Fluid Flooring or thermal-shock-resistant Trowel-Applied Polyurethane Mortar Flooring.
5. Can You Provide Proof of Commercial Liability Insurance and Provincial WSIB Compliance?
Working with heavy equipment on active job sites carries inherent risk. You must ensure you are shielded from legal and financial liability.
- What to look for: Request an active Certificate of Commercial General Liability (CGL) Insurance (typically $2M–$5M) and an up-to-date WSIB Clearance Certificate (or local workers’ compensation compliance) to verify their crew is fully covered.
6. What Silica Dust Control and Site Safety Measures Will Be Used?
Mechanical concrete grinding generates fine, hazardous respirable crystalline silica dust that can pollute indoor air quality, HVAC systems, or active inventory.
- What to look for: Ensure the contractor uses industrial, OHSA/OSHA-compliant, multi-stage HEPA-filtered vacuum extraction units connected directly to their grinding machinery during mechanical work or Concrete Polishing.
7. What Is the Exact Project Timeline, Including Cure Times Before Full Use?
A contract should state when work starts, but more importantly, it must detail when the floor can support different operational loads.
- What to look for: Ask for specific milestones detailing when the floor will accept light foot traffic, heavy equipment/vehicular traffic, and full chemical exposure—especially for exterior work like Traffic Toppings or layout for Parking Lot Line Painting.
8. What Specific Product Brands, Formulations, and Mil Thicknesses Will Be Used?
Generic terms like “epoxy coating” or “sealant” on an estimate leave room for low-quality materials or thin applications.
- What to look for: The quote should itemize exact product manufacturer names, chemical types (e.g., 100% solids epoxy, polyaspartic, polyurethane mortar), number of coats, and target wet/dry mil thickness for specialized installations like Garage Epoxy Coatings.
9. How Are Warranties Structured Between Material and Workmanship?
If a floor fails, you do not want to be caught in a dispute between the material manufacturer and the installer.
- What to look for: The contract should clearly distinguish between the manufacturer’s material warranty and the contractor’s labor/workmanship warranty. Ask if single-source system warranties are available.
10. Can You Provide Recent Local References and Case Studies for Similar Projects?
A reputable contractor should have a proven track record of completed projects in your region.
- What to look for: Request references or case studies for facilities with similar operational demands (e.g., commercial kitchens, distribution centers, retail spaces, or custom residential basements).
Partner with Accountable Concrete Specialists in Ontario
Asking these questions ensures your project is backed by structural integrity, trade compliance, and transparent execution.
At AK Level & Polish, we welcome these questions on every project. We provide facility managers, developers, and homeowners across Toronto, the GTA, and Southern Ontario with itemized proposals, full WSIB compliance, certified applicators, and comprehensive insurance coverage.
Ready to discuss your upcoming concrete flooring project? Contact AK Level & Polish today to schedule a site consultation and request an itemized proposal.
Contact Information
AK Level & Polish Inc.
📍 895 Don Mills Rd. Suite 900, Toronto, ON M3C 1W3
📞 +1 (647) 768-8517
✉️ aklevelandpolish@gmail.com
