Why Epoxy Floors Fail — and What We Do About It
Epoxy floor repair in Toronto requires diagnosing the root cause first — not just patching the surface. When they do fail, the cause is almost always traceable to one of three issues: inadequate surface preparation, moisture in the concrete slab, or the wrong epoxy system being applied in the wrong environment.
At ProEpoxy, our repair service doesn't just patch the surface. We start by diagnosing the root cause of the failure so we're not just covering up a problem that will resurface in six months. Every repair begins with a full assessment — measuring adhesion, testing for moisture, evaluating coating thickness, and identifying the specific failure mode. Then we develop a repair scope that fixes it properly.
We fix floors installed by us. We also fix floors installed by other contractors, including DIY jobs and rushed installations from companies that skipped critical prep steps. Our crew has restored flooring in warehouses, garages, commercial kitchens, automotive shops, and retail spaces across Toronto and the GTA.
Epoxy Floor Repair Services We Provide
Not all epoxy floor problems require a full replacement. Many failing floors can be restored to full performance and appearance through targeted repair and resurfacing — often at 30–50% of the cost of a new installation. Here are the specific repair services our crew provides:
Peeling and Delamination Repair
Delamination — where the epoxy separates from the concrete underneath — is the most common failure mode we see. It's almost always caused by inadequate surface preparation (the coating bonded adhesively rather than chemically) or moisture vapor transmission pushing the coating up from below. We remove the delaminated sections, address the root cause (whether that's moisture mitigation, a repair primer, or additional grinding), and rebond new epoxy to a properly prepared substrate. In many cases, we can match the existing colour and finish so the repair is invisible.
Crack Filling and Joint Repair
Concrete moves — it expands in heat and contracts in cold, and settlement cracks are inevitable over time. When those cracks migrate through an epoxy coating, water infiltrates, weakens the bond, and accelerates failure in the surrounding area. Our crew fills cracks with a flexible epoxy crack filler that moves with the slab rather than against it. For control joints and expansion joints that have failed or were improperly treated during the original installation, we route out the joint, fill it correctly, and rebuild the epoxy surface over it.
Chip and Impact Damage Repair
Dropped tools, forklifts, and heavy equipment can chip or gouge epoxy coatings down to the concrete. Left unaddressed, these spots allow moisture ingress and create tripping hazards. We grind the damaged area back to clean concrete, fill any substrate damage with epoxy filler, and rebuild the coating system to full thickness — with a feathered edge blend that minimizes visibility.
Epoxy Resurfacing and Recoating
Some floors haven't failed catastrophically but are showing age — dull finish, loss of anti-slip texture, surface scratches, or faded colour. If the existing coating still has good adhesion, we can resurface over it. This involves light scarification to create a mechanical bond profile, then application of a new broadcast, colour coat, and UV-resistant topcoat. The result is a floor that looks new and has renewed surface protection — typically completed in one day.
Fixing Poor Contractor Work
We regularly get called in after other contractors — or DIY installations — have failed. Common issues include bubbling from solvent-based products applied too thickly, fisheyeing from contaminated surfaces, colour inconsistency from improper mixing ratios, and premature wear from inadequate topcoat. We've developed a systematic approach to diagnosing and correcting these problems, and in most cases can restore the floor without requiring full removal of the existing system.
Concrete Substrate Repair
Sometimes the problem isn't the epoxy — it's the concrete underneath. Spalled, friable, or deeply cracked concrete needs to be restored before any coating can adhere correctly. Our crew handles concrete patching, levelling, and densification as part of our repair scope, ensuring that the substrate is sound before any new epoxy is applied.
Signs Your Epoxy Floor Needs Professional Repair
Many floor problems get worse — and more expensive — the longer they're left. If you're seeing any of the following, call us for a free assessment:
- Bubbles, blisters, or raised sections in the coating
- Peeling, flaking, or sections that lift when pulled
- Visible cracks — especially ones that have grown over time
- Yellowing, chalking, or significant colour fading
- Loss of anti-slip texture (a safety issue)
- Pooling water or areas that won't dry — indicating delamination
- Sections that sound hollow when tapped
- Chemical stains or burns that have penetrated the topcoat
Repair vs. Full Replacement: What Makes More Sense?
This is the most important question we answer during our free on-site assessment. In many cases, targeted repair is significantly more cost-effective than a full replacement — but it only makes sense when the coating system still has enough integrity to bond with repair materials, and when the failure is localized rather than widespread.
Full replacement is typically the right call when: delamination affects more than 40–50% of the floor area; the concrete substrate has significant structural issues; the existing coating is incompatible with the new system being applied; or the floor is more than 15–20 years old and showing widespread degradation.
When you repair, you're extending the life of an existing system. When you replace, you're starting fresh with a proper foundation. Our assessment tells you honestly which one is the right investment for your specific floor.
Our Epoxy Repair Process
We follow a systematic approach to every repair job, regardless of size. This ensures that we're fixing the actual problem — not just painting over it.
- Step 1 — On-site assessment: We inspect the floor, test adhesion, measure moisture, and identify the failure mode. We give you a written scope before any work begins.
- Step 2 — Remove failing sections: All delaminated, bubbled, or structurally compromised coating is removed by grinding back to sound concrete. We don't patch over bad adhesion.
- Step 3 — Address root cause: Moisture issues, substrate damage, and contamination are resolved at this stage — before any coating is applied.
- Step 4 — Substrate repair: Cracks, chips, spalling, and uneven areas in the concrete are filled and levelled with epoxy mortar or filler.
- Step 5 — New epoxy system: The appropriate repair primer, base coat, and topcoat are applied in sequence. Cure times between coats are strictly respected.
- Step 6 — Quality inspection and handoff: We conduct a 12-point QC check, walk you through the repair, and provide documentation of the work completed.
Epoxy Repair Costs in Toronto
Repair pricing varies based on the failure type, affected area, and the amount of prep work required. As a general guide: targeted crack filling and small-area chip repair typically ranges from $8–$15 per square foot; resurfacing an existing coating (where adhesion is good) is typically $6–$12 per square foot; localized delamination repair depends heavily on how much coating needs to be removed and the extent of substrate work required.
We provide a free written quote after the on-site assessment. There are no hidden fees, and we clearly document what we're doing and why — so you can make an informed decision about repair vs. replacement.