May an Ottawa restaurant kitchen stay open during coating?

Staying open during an epoxy or polyaspartic coating application in an Ottawa restaurant kitchen is almost certainly not possible, and attempting it would create serious health, safety, and practical problems that no responsible contractor should agree to work around.

Why Closure Is Essentially Mandatory

The core issue is air quality. Even water-based epoxy systems release volatile organic compounds (VOCs) during application and the early stages of curing. Solvent-based epoxy and 100 percent solids systems release significantly more, and the chemical odours from hardeners, primers, and topcoats are not just unpleasant — they can contaminate food, migrate into ventilation systems, and create an environment that no health inspector would approve. Ottawa Public Health enforces food premises regulations under Ontario's Food Premises Regulation (O. Reg. 493/17), and operating a food service area with active chemical coating work happening on the floor would almost certainly constitute a violation. The risk of a closure order or failed inspection is real and immediate.

Beyond air quality, the practical requirements of proper epoxy application make coexistence with food service impossible. Diamond grinding or shot blasting the concrete — which is mandatory for any professional-grade coating — produces significant dust and noise. The floor must be completely clear of equipment, mats, and foot traffic throughout the application and curing process. Most commercial epoxy systems require 24 to 72 hours of uninterrupted cure time before any foot traffic is permitted, and full chemical cure for vehicle-weight or heavy equipment loads takes 5 to 7 days.

For a commercial kitchen specifically, contractors in Ottawa typically use 100 percent solids epoxy or polyurea systems with quartz broadcast for slip resistance, chemical resistance to grease and cleaning agents, and seamless hygienic surfaces. These are the most demanding systems to apply and require the most controlled conditions. Polyaspartic systems can reduce downtime significantly — some formulations allow foot traffic in 4 to 6 hours — but the floor still cannot be in active use during application or the initial cure window.

From a cost perspective, a commercial kitchen floor coating in Ottawa runs $8 to $18 per square foot depending on system choice, floor condition, and the extent of concrete preparation needed. If the concrete has grease penetration from years of kitchen use — which is extremely common — additional degreasing steps and possibly acid etching will be required before any coating will bond properly. Grease-contaminated concrete is one of the most common causes of coating failure in restaurant environments, and it adds both time and cost to the preparation phase.

The realistic path forward for most Ottawa restaurant owners is to plan the coating project around a scheduled closure — a holiday weekend, a slow season, or a planned renovation shutdown. Polyaspartic systems offer the fastest return to service and are worth the premium cost in a commercial setting precisely because they compress the downtime window. A skilled contractor working with a fast-cure polyaspartic system can sometimes complete a kitchen floor over a two-day closure, depending on floor size and condition.

For permit requirements, coating an existing kitchen floor is generally a maintenance activity that does not require a City of Ottawa building permit, but you should confirm with your landlord and your health inspector before work begins, particularly if the coating changes the floor's drainage characteristics or if the space is in a building with shared systems.

If you are ready to plan this project, the Ottawa Construction Network directory at justynrookcontracting.com lists flooring contractors experienced in commercial applications. Getting at least three written quotes — and asking each contractor specifically about their commercial kitchen experience and minimum closure time requirements — will give you the clearest picture of what your project needs.