Arc Welding Services
Canawelding is a CWB-certified arc welding contractor serving Toronto, Mississauga, Brampton, Vaughan, Markham, and the broader GTA. From structural SMAW on active construction sites and FCAW for high-deposition outdoor work to on-site MIG repairs, we deploy the right arc process for your material, position, and site conditions — same day, fully equipped.
- All major arc processes on every truck — SMAW (stick), FCAW (flux-cored), and GMAW (MIG)
- Structural steel, mild steel, outdoor and windy-site work — stick and FCAW without gas supply required
- CWB-certified welders under CSA W47.1 with structural framing background through CanaStruct Inc.
- Full commercial general liability insurance and active WSIB clearance on every call
- Transparent, itemized quotes — one price, one invoice, no surprises
What Is Arc Welding?
Arc welding is the broad category of welding processes that use a sustained electrical discharge — an arc — between an electrode and base metal to generate the heat required for fusion. In all arc processes, current flows through an ionized gas column reaching 3,000–5,000°C, melting the base metal and depositing filler simultaneously. The three primary arc processes Canawelding uses on-site are SMAW (Shielded Metal Arc Welding / stick), GMAW (Gas Metal Arc Welding / MIG), and FCAW (Flux-Cored Arc Welding).
Each process has specific strengths. SMAW uses a flux-coated consumable electrode — no external gas supply required, making it the most portable arc process and the best choice for outdoor, windy, and overhead structural steel work. FCAW uses hollow wire with flux inside, combining portability with the speed of wire feed for high-deposition structural applications. GMAW (MIG) is fastest and cleanest on prepared metal in sheltered environments. We select the process that fits your material, position, access, and site conditions — not the one that’s easiest to set up.
Canawelding is a division of CanaStruct — a structural framing company operating across Ontario. Our arc welders carry all three processes on every truck and make the process selection decision on your behalf based on genuine field judgment. Related search terms: arc welder Toronto, stick welding GTA, SMAW welding contractor Toronto, flux-cored arc welding on-site, structural arc welding Toronto, arc welding near me.
Book Consultation
Canawelding carries full commercial general liability insurance and WSIB coverage. Every job quoted on-site before work begins.
Types of Arc Welding Services We Offer
Arc Welding for Every Project Type
Residential Arc Welding
Homeowners and property managers who need professional welding without dismantling anything. Common residential arc welding calls include fence and gate repair, concrete-anchored post repair, stair and balcony railings, decorative wrought iron, and outdoor structural metal repairs that can’t be transported.
We come to your property, assess on-site, and provide a written price before any work begins. SMAW is typically the right process for outdoor residential work — portable, weather-tolerant, no gas supply.
Commercial & Construction Arc Welding
Developers, general contractors, and site managers who need a certified arc welding partner for structural steel connections on active builds. SMAW and FCAW are the right processes for construction sites — wind-tolerant, no gas supply required, and appropriate for structural steel in all positions and orientations.
CWB certification, liability insurance, and WSIB clearance are provided in advance. We coordinate with GCs and site supervisors, integrate into live construction schedules, and provide documentation for any HSE process.
Industrial & Plant Arc Welding
Plant operators and maintenance managers who need a qualified arc welder on the floor fast. SMAW handles dirty, rusty, or coated metal better than any other process — ideal for plant maintenance work where surface preparation is limited and downtime is expensive.
We respond to industrial facilities across Mississauga, Brampton, Vaughan, and the GTA. All HSE documentation available before site entry. Process selection (SMAW vs. FCAW vs. MIG) based on actual site conditions — not default preference.
FCAW — High-Deposition Structural Work
Flux-cored arc welding combines the wire-feed speed of MIG with the outdoor portability of stick. Self-shielded FCAW operates without external gas supply — ideal for exposed structural steel on open construction sites where wind makes MIG unreliable. Higher deposition rates than SMAW mean faster completion on heavy plate and structural connections.
We carry self-shielded FCAW wire alongside MIG and SMAW equipment. When your site conditions or material thickness make FCAW the right call, it’s already on the truck.
Get Free Quote
CanaWelding Inc carries full commercial general liability insurance and WSIB coverage. Every project is performed by qualified, supervised tradespeople
Process Comparison
Stick (SMAW) vs. Flux-Cored (FCAW) — Which Arc Process Is Right?
Both stick and flux-cored are arc processes suited for outdoor and structural work without external gas. The right choice depends on material thickness, deposition rate requirements, and surface condition. We make the process selection on-site — you describe the job.
Arc Welding vs. Alternative Processes
Stick Welding (SMAW) Manual · Flux-Coated Electrode · Most Portable
- Most portable arc process — no wire feeder, no gas supply, minimal equipment footprint
- Works on dirty, rusty, painted, or coated base metal — no prep required for maintenance welds
- Wind and weather tolerant — the only reliable arc process in high-wind outdoor conditions
- All positions: flat, vertical, overhead, horizontal — reliable in any orientation
- E7018 low-hydrogen electrode for structural steel under CSA W47.1
- Slower deposition rate than FCAW — more slag cleanup after welding
- Best for: outdoor structural repairs, rusty metal, remote or access-limited sites
Flux-Cored (FCAW) Wire Feed · Self-Shielded Option · High Deposition
- Higher deposition rate than stick — faster on heavy structural plate and connections
- Self-shielded versions operate outdoors without external gas supply
- Better penetration on thicker plate than GMAW — deeper fusion on heavy structural steel
- Works on mildly contaminated surfaces — more tolerant than MIG on dirty metal
- More portable setup than GMAW for self-shielded versions (no gas bottle)
- More spatter than GMAW — requires cleanup on work where surface appearance matters
- Best for: heavy structural steel, outdoor high-volume work, exposed site conditions
Arc Welding vs. MIG for Structural Steel
MIG (GMAW) is faster and cleaner than stick on prepared metal in sheltered conditions — it’s the right choice for indoor structural fabrication, commercial fit-outs, and covered construction areas. But MIG requires shielding gas and is wind-sensitive; on exposed structural steel in open sites, SMAW or FCAW is the correct process. Canawelding trucks carry all three processes and make the selection based on your specific site and material — not habit.
Service Areas we Serve
Canawelding dispatches mobile arc welders to every major city in the Greater Toronto Area. Structural steel connections on active construction sites across the city core. Industrial maintenance arc welding in Brampton, Vaughan, and Mississauga. Residential repairs and outdoor structural work throughout Oakville and Richmond Hill.
- Toronto (all neighbourhoods)
- Etobicoke
- Scarborough
- North York
- Mississauga
- Brampton
- Oakville
- Burlington
- Vaughan
- Richmond Hill
- Newmarket
- Markham
- Ajax / Pickering
- Oshawa
Frequently Asked Questions
What is arc welding?
Arc welding uses a sustained electrical arc — a plasma discharge between electrode and workpiece — to generate the heat required to melt and fuse metal. The arc reaches 3,000–5,000°C. The three main arc processes Canawelding uses are SMAW (stick), GMAW (MIG), and FCAW (flux-cored). Each has specific strengths for different materials, positions, and site conditions. We select the right process for your job.
What is shielded metal arc welding (SMAW)?
SMAW — stick welding — uses a flux-coated consumable electrode. As the electrode burns, the flux coating creates shielding gas to protect the molten pool and leaves a slag cover over the weld as it solidifies. No external gas supply required — the most portable arc process. Best for outdoor structural work, dirty metal, and remote or access-limited sites. Standard for CWB structural certification under CSA W47.1.
What is flux-cored arc welding (FCAW) and when is it used?
FCAW uses hollow wire with flux inside — combining the wire-feed speed of MIG with outdoor portability. Self-shielded FCAW operates without external gas supply, making it wind-tolerant on exposed structural sites. FCAW offers higher deposition rates than stick and works on mildly contaminated surfaces. Best for heavy structural plate and outdoor high-volume connections where MIG’s gas supply is a liability.
Is arc welding certified for structural work in Ontario?
Yes — structural arc welding in Ontario requires CWB certification under CSA W47.1 for the company, and welder qualification testing under the applicable weld procedure. We hold CWB certification for SMAW, GMAW, and FCAW. Welder qualification records, weld procedure specifications (WPS), and CWB documentation are available before any construction project requiring compliance.
How much does arc welding cost in Toronto?
On-site arc welding across the GTA: residential repairs typically $150–$450, commercial structural work $350–$1,000+ depending on scope and access, industrial plant maintenance quoted on-site after assessment. No shop drop-off, no travel surcharge within our GTA service area. Full written quotes provided before work begins on all commercial and construction projects.
Why would you use stick welding instead of MIG?
Stick welding (SMAW) is the right choice when: the site is outdoors and wind makes MIG shielding gas unreliable; the base metal is rusty, dirty, or coated; access is limited and a large MIG setup is impractical; or the structural position (overhead, vertical) favours a compact electrode setup. MIG produces cleaner welds on prepared indoor metal — stick produces more reliable welds in difficult field conditions. We use whichever process the job actually requires.
Can you weld structural steel on active construction sites?
Yes — active construction sites are a core part of our work. We coordinate directly with general contractors and site managers, provide required CWB, insurance, and WSIB documentation in advance, and integrate cleanly into live construction schedules. Our structural framing background through CanaStruct means we understand construction sequencing and can operate on an active site without disrupting the schedule.
What types of steel can you arc weld?
Mild steel, structural steel (A36, A992, HSS), weathering steel, and cast iron using appropriate electrodes. E7018 low-hydrogen electrodes are standard for structural steel under CSA W47.1. For cast iron repair, nickel-based SMAW electrodes are used. If your job involves an unusual material or grade, describe it when you call and we’ll confirm electrode and process selection before booking.
How quickly can you dispatch an arc welder?
For standard booked jobs, 1–3 business days across the GTA. For urgent structural or emergency breakdown calls, contact us directly at (647) 641-0550 — phone gets you a faster response than a form submission. We provide an honest arrival estimate and hold to it.
Which areas does Canawelding serve for arc welding?
Canawelding provides on-site arc welding across the Greater Toronto Area — Toronto, Etobicoke, Scarborough, North York, Mississauga, Brampton, Oakville, Burlington, Vaughan, Richmond Hill, Newmarket, Markham, Ajax/Pickering, and Oshawa. If your arc welding project is in the GTA, reach out — we are likely already working in your area.