Commercial kitchen exhaust is not just ductwork. Grease ducts and fire-rated exhaust systems deal with heat, grease vapour, and fire risk. If you own a restaurant, manage a commercial building, or are upgrading a kitchen in Edmonton, welding work on these systems needs to be done with the right materials and a safety-first approach.
Why grease duct welding is different from regular ductwork
Standard HVAC duct can be light gauge and designed for air movement. Grease ducts handle grease-laden vapour and higher temperatures. The goal is containment. That means seams need to be tight, durable, and cleanable. When a system is poorly built, grease leaks and buildup become a real fire hazard.
Common welding-related tasks
- Fabricating duct sections: custom transitions, offsets, and penetrations.
- Repairing cracked seams: often caused by vibration, thermal cycling, or poor support.
- Rebuilding supports: hangers and brackets that keep ducts from sagging or pulling.
- Upgrading access panels: to support cleaning and inspection.
Material and joint details that matter
Many grease duct systems use stainless steel because it handles heat and cleaning better. Welding stainless is not hard, but it is less forgiving than mild steel when it comes to contamination and heat tint. For a clean, durable result, the joint needs proper prep and correct shielding.
What makes a good duct weld
- Continuous seam where required: no skipped areas where grease can leak.
- Solid tie-in at corners: corners are where cracks start if the weld is weak.
- Controlled heat: avoid warping panels that need to fit tight.
- Clean finish: minimize crevices that trap grease and make cleaning harder.
Site realities in Edmonton kitchens
Kitchens are busy, tight spaces. Access can be the biggest challenge, especially in older buildings and downtown spaces. Many jobs have to be scheduled after hours to avoid disrupting service. Good planning includes clearing the work area, protecting surfaces, and setting up proper ventilation for welding fumes.
Hot work safety and fire risk
Grease is fuel. Even if the duct looks clean, hidden buildup can ignite. That is why hot work permits, fire watch, and site preparation matter. If the duct system has known grease buildup, cleaning may be required before welding. Welding should never be used to solve a problem while ignoring the fire risk sitting inside the duct.
| Concern | Why it matters | Practical control |
|---|---|---|
| Grease buildup | Fire risk | Clean before hot work when needed |
| Warped panels | Leaks and poor fit | Control heat, stitch, clamp |
| Bad supports | Cracks and vibration | Rebuild hangers and bracing |
Repairs vs replacement
If a duct has widespread cracking, heavy corrosion, or severe grease saturation, replacement can be smarter than chasing leaks with patches. A proper assessment looks at the whole run: seams, joints, supports, and access for cleaning. The cheapest repair is not the best if you end up paying again after the next inspection.
How YEGWELD can help
We provide mobile welding, fabrication, and repair work across Edmonton and a 100 km radius. If you need stainless duct repairs, bracket fabrication, or structural support work related to a kitchen exhaust system, we can coordinate the welding side and keep the job tidy and safe.
Get a quote
Call 780-233-8285 or use our contact page to send photos and your location. We are available 24/7 for urgent repairs.
This article is for informational purposes only and may contain inaccuracies. Always consult a certified welding professional before starting any project.
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