 *Photo: Unsplash*
Summer in Montreal means one thing above all else: BBQ season. From late May through September, decks and terrasses across NDG, Verdun, Rosemont, Longueuil, and Brossard light up every weekend. But a winter of sitting under a cover — or worse, no cover at all — leaves most grills in rough shape by the time July hits. Grease has carbonized onto the grates, the burner tubes are clogged, and in Montreal's cottonwood season, poplar fluff has packed itself into every vent.
A dirty grill isn't just unpleasant. Carbonized grease and blocked burners are the leading cause of BBQ flare-ups — the same grease fires we covered in our [kitchen grease fire cleanup guide](/en/blog/how-to-clean-up-after-kitchen-grease-fire-montreal-apartment). Before you fire up the grill for your next family gathering, here's how to deep clean a BBQ or gas grill the right way — with Montreal-specific context on propane storage rules, condo restrictions, and where to find supplies in your neighbourhood.
Before You Start: Montreal Condo and Propane Rules
If you live in a condo with a DCC (déclaration de copropriété), your BBQ options may be regulated by your building's by-laws. Many Montreal condo boards prohibit propane tanks in enclosed storage lockers — a fire code requirement under Section 7 of the Quebec Regulation respecting petroleum products. Propane cylinders must be stored vertically in a ventilated outdoor area. Some newer condo buildings ban gas grills on terrasses entirely and require electric grills only.
Before you clean your grill, confirm: - Whether your DCC permits gas grills on your balcony or terrasse - Whether your building has a designated outdoor propane storage area (usually near the bike room or on the terrace level) - If charcoal grills are permitted (many condo boards ban both gas and charcoal — electric only)
For triplex renters in Plateau, NDG, Rosemont, Villeray, or HoMa, a charcoal or gas BBQ in a shared backyard is generally permitted unless your lease says otherwise. A portable grill is not a permanent modification, so the TAL form F-4 (alterations) typically does not apply — but check with your landlord if unsure.
Suburban homes in Laval, Longueuil, Brossard, and Saint-Laurent have the fewest restrictions — both gas and charcoal grills are generally permitted on decks and patios, subject to municipal fire-safety setback rules (keep grills at least 3 metres from the building).
What You'll Need
Gather your supplies before you start. Everything is available at Canadian Tire, Rona, or Home Hardware in Montreal:
- Grill brush or grill brick (Canadian Tire ~$12–18; never use wire brushes with loose bristles — bristles break off and can end up in food)
- Dish soap (Dawn or Palmolive — available at IGA, Maxi, PA)
- Baking soda — mild abrasive for carbonized grease on grill grates
- White vinegar — dissolves calcium scale from Montreal's hard water (90–150 mg/L hardness)
- BBQ degreaser spray (Simple Green or Weber grill spray — Canadian Tire ~$8)
- Plastic scraper for ash trays and drip trays
- Bucket and garden hose (or utility sink for portable grills)
- Rubber gloves
- Old rags or paper towels
- Vegetable or canola oil — for re-seasoning cast-iron grates after cleaning
Step 1: Safety First — Disconnect the Propane
Never clean a gas grill with the propane connected.
1. Turn all burner knobs to OFF 2. Turn the propane tank valve clockwise to fully close 3. Disconnect the regulator from the tank 4. Move the tank to a safe outdoor location while you clean
If you have a charcoal grill, ensure the ash is completely cold. Wait at least 24 hours after the last use — ash retains heat far longer than it appears, and wet ash on an aluminium tray generates hydrogen gas.
Step 2: Remove Grates, Burner Covers, and Drip Trays
Take everything out of the grill body: - Cooking grates (cast iron, porcelain-coated, or stainless) - Flame tamers or burner covers (also called heat shields or briquette plates) - Drip tray and grease catch pan
Set them aside on cardboard or an old drop sheet on your [balcony](/en/blog/how-to-clean-a-balcony-montreal) or driveway.
Step 3: Clean the Grates
Cast Iron Grates
1. While still slightly warm (not hot), scrub with a grill brush to loosen carbonized food 2. Mix baking soda and dish soap into a paste and apply to stubborn spots; let sit 15 minutes, then scrub with a non-metal pad 3. Rinse thoroughly 4. Dry immediately and completely — Montreal's summer humidity (70–75% July–August) will rust cast iron within hours if left wet 5. Apply a thin coat of vegetable oil and heat briefly on the grill to re-season
Porcelain-Coated Grates
Use a nylon brush or grill brick only — wire brushes chip the porcelain coating and expose the steel underneath to rust. Soak in warm soapy water for 30 minutes, rinse, and dry.
Stainless Steel Grates
Bar Keepers Friend (available at Canadian Tire) removes burnt-on grease and calcium deposits from Montreal's hard water. Scrub with the grain of the steel, rinse, and dry.
Step 4: Clean the Burner Tubes
This is the most important safety step. Blocked burner port holes cause uneven heat, flare-ups, and yellow flames — a sign of incomplete combustion that also produces carbon monoxide.
1. With a stiff brush, scrub the outside of each burner tube 2. Use a small wire or pipe cleaner to clear each port hole (the small holes running along the tube) 3. Check for spider webs inside the venturi tubes — spiders nest in gas grill air intake tubes during winter storage, and a blocked tube is a serious fire hazard 4. Check for rust or corrosion on the tubes; if a burner tube has holes or perforations outside the port holes, replace it (Canadian Tire carries replacement burner kits for most major brands for ~$25–45)
Montreal Cottonwood Alert
If your grill has been sitting uncovered from late May through mid-June, peuplier du Canada (cottonwood/poplar) fluff will have packed itself into the burner vents and collected under the flame tamers. Montreal's cottonwood season is intense — the white fluff covers everything outdoors for 2–3 weeks. Remove it completely before lighting, as dry cottonwood fluff is highly flammable.
Step 5: Clean the Grill Interior
1. Scrape the inside of the lid with a plastic scraper — the black flaky residue is carbonized grease. Despite the popular myth, this is not "natural seasoning." It is a fire hazard and should be removed. 2. Brush the interior walls down, letting debris fall to the grill bottom 3. Scoop out accumulated grease and carbon with a plastic scraper and discard in the garbage 4. Wipe with a damp cloth and BBQ degreaser
Step 6: Clean the Drip Tray and Grease Pan
The drip tray is where most BBQ grease fires start. It collects liquid fat that drips through the cooking grates during use.
1. Scrape out solidified grease into a garbage bag — never pour grease down a drain or toilet. It solidifies in Montreal's old cast-iron pipes and causes serious blockages. Dispose of it with regular household garbage. 2. Wash the pan with hot soapy water 3. For built-in trays, line with aluminum foil after cleaning — this makes future cleanup much faster
Step 7: Clean the Exterior
- Stainless steel lid: Wipe with a microfibre cloth and a small amount of dish soap; for water spots caused by Montreal's hard water, white vinegar dissolves the calcium residue; dry immediately to prevent new spots
- Painted steel body: Wipe with a damp cloth and mild soap only — avoid abrasives that scratch and expose the steel to rust
- Side shelves and control knobs: Wipe down with a damp cloth
Step 8: Reassemble and Test
1. Reassemble all grates, burner covers, and drip trays 2. Reconnect the propane regulator to the tank 3. Perform a soap bubble leak test before lighting: apply soapy water to all gas connections — if bubbles form, there is a gas leak; tighten or replace the connection 4. Open the grill lid, turn the gas on, and light the grill according to the manufacturer's instructions 5. Let it heat on high for 15 minutes with the lid closed — this burns off any remaining cleaning residue
Seasonal BBQ Maintenance Calendar for Montreal
| Season | Task | |--------|------| | April–May (pre-season) | Full deep clean after winter storage; replace propane tank if nearly empty; check burner tubes for spider nests and cottonwood; inspect grates for rust | | June–August (peak season) | Brush grates after every use while warm; empty drip tray every 2–3 uses; wipe exterior monthly; check for cottonwood buildup after May–June fluff season | | September (post-season) | Full deep clean; re-season cast iron grates with vegetable oil; disconnect and store propane tank outdoors in a ventilated area (never a closed storage locker, car, or garage) | | October–March (winter storage) | Cover with a waterproof grill cover; Montreal's freeze-thaw cycles can warp porcelain-coated grates if water pools inside the grill |
When to Call a Professional
If your BBQ season is already underway and your outdoor space needs a thorough clean, our [deep-cleaning service](/en/services/deep-cleaning) covers balconies, terrasses, and outdoor areas. We can include your grill area as part of a comprehensive [home cleaning](/en/services/home-cleaning) visit. Explore our [eco-friendly cleaning](/en/services/eco-friendly-cleaning) options for non-toxic products safe for cooking surfaces and food-contact areas.
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Frequently Asked Questions
Q: Can I use a wire brush to clean my BBQ grill grates?
A: Wire brushes with loose bristles are a documented health hazard — metal bristles detach and can become embedded in food, causing serious injuries. Use a coil spring grill brush, a grill stone or brick (Canadian Tire ~$8–12), or a ball of crumpled aluminum foil held with tongs. If you do use a wire brush, inspect it carefully before every use and discard it at the first sign of loose or damaged bristles.
Q: Are gas BBQs allowed on Montreal condo balconies?
A: It depends on your DCC (déclaration de copropriété). Many Montreal condo buildings prohibit propane tanks in enclosed storage areas — a Quebec fire code requirement. Some boards ban gas grills on terrasses entirely. Check your condo by-laws before purchasing a gas grill. Under Quebec fire regulations, propane cylinders must be stored vertically in a ventilated outdoor location — never in a closed storage locker, car trunk, or underground garage.
Q: How do I remove rust from cast iron BBQ grates?
A: Apply a paste of baking soda and water to the rusted areas, leave for 30 minutes, then scrub with a steel wool pad. Rinse thoroughly and dry completely and immediately — Montreal's summer humidity (70–75%) will cause cast iron to re-rust within hours if left even slightly damp. Re-season with a thin coat of vegetable oil and run the grill on high for 15 minutes to polymerize the oil coating.
Q: Why does my gas grill have yellow flames instead of blue?
A: Yellow or orange flames indicate incomplete combustion — usually caused by blocked burner port holes or a blocked venturi tube. Turn off all burners, close the propane tank valve, disconnect the regulator, and clear each port hole with a small wire or pipe cleaner. In Montreal, spider nests in the venturi tubes over winter are the most common cause — a single spider web completely blocks airflow and produces the yellow-flame symptom when the grill is first lit in spring.
Q: How often should I clean my BBQ grill in Montreal?
A: Brush the grates after every use while still warm — this prevents carbonized food from bonding to the surface and takes under a minute. Empty the drip tray every 2–3 uses to prevent grease buildup (the primary cause of BBQ flare-ups). Do a full deep clean twice per season: pre-season in April–May after winter storage, and post-season in September before storage.
Q: What should I do with old grease from my BBQ?
A: Allow liquid grease to cool and solidify, then scrape it into a sealed garbage bag and put it in your regular household trash. Never pour grease down a drain or toilet — it solidifies in Montreal's old cast-iron pipes and causes serious blockages. Never pour grease into your green compost bin — it attracts pests and disrupts the composting process. Never burn grease off by turning the grill to maximum heat — accumulated grease in the drip tray causes dangerous flare-ups and is the leading cause of residential BBQ fires.
