Can I apply epoxy to my garage floor myself in New Brunswick?

Yes, DIY epoxy floor coating is achievable for an NB homeowner, but surface preparation is where most DIY epoxy projects succeed or fail -- and it is far more work than the application itself.

Epoxy bonds chemically to concrete, so the surface must be porous, clean, and free of any previous coatings, sealers, oil, or curing compounds. New concrete in New Brunswick must cure for a minimum of 30 days before any epoxy application -- ideally 60-90 days for the moisture content to stabilize. Applying epoxy to concrete that is too new or too damp will cause peeling and delamination within the first winter.

Preparation is 80% of the job. The concrete must be mechanically prepared by acid etching or grinding. Acid etching (muriatic acid diluted with water, applied and scrubbed, then thoroughly neutralized and rinsed) opens the pores of the concrete so the epoxy can penetrate. Grinding with a rented floor grinder is more effective and produces more consistent results but adds $100-$200 to your rental cost. Either way, any oil stains must be degreased and removed beforehand -- epoxy will not bond over oil contamination.

For the NB garage environment specifically, moisture vapour transmission is a real concern. Many NB garage floors are poured on grade with limited vapour barrier protection below. Moisture rising from the soil through the slab will lift epoxy from beneath, causing bubbling and peeling. Test for moisture by taping a plastic sheet to the floor and leaving it for 24 hours -- if condensation forms beneath the plastic, your slab has a moisture problem that needs to be addressed before any coating is applied.

DIY epoxy kits from NB home improvement stores run $100-$250 for a two-car garage kit and typically include a base coat, colour flakes, and a topcoat. These water-based epoxy kits are user-friendly but thinner and less durable than 100% solid epoxy products used by professionals. In the NB climate with its temperature swings and road salt tracked in from November through April, a DIY water-based epoxy kit will likely need recoating every 3-5 years.

Apply only when the garage temperature is between 10-25 degrees Celsius -- in NB, that means May through September for most garages. Epoxy will not cure properly in the cold, and NB garage floors drop below acceptable temperatures quickly in fall and spring.

If your floor has significant cracking, spalling, or moisture issues, or if you want a long-lasting result from a professional-grade polyaspartic or 100% solids epoxy, professional application runs $4-$8 per square foot -- roughly $1,600-$4,000 for a two-car garage floor. The professional result will outlast multiple DIY applications. New Brunswick Concrete can connect you with local flooring contractors for a free quote.