Industrial Welding & Assembly Services in Ontario

Industrial welding and assembly services at WeFab in Leamington, Ontario, turn cut steel into finished weldments, frames, and structural assemblies for industrial, data centre, and heavy-industry builds.

Whether you need custom sheet metal weldments or heavy structural frames, our fabrication capabilities provide the capacity and flexibility to support changing project demands and delivery timelines.

Welding & Assembly Capabilities

WeFab welds and assembles sheet weldments, structural frames, and production parts in-house: 19 welders across 21 MIG, 2 TIG, and 2 laser welding stations, plus a custom robotic truss-welding cell, all inside the same Leamington shop that cuts and forms the parts.

Structural welding: beams, columns, frames, base plates, and connection details fabricated to CSA S16
Production welding: repeat weldments on dedicated MIG stations, built to a fixed procedure and fit-up
Sheet weldments: enclosures, brackets, and frames welded from laser-cut and formed sheet
Robotic truss welding: a custom cell built by NRTC for repeatable truss production
Mechanical assembly: welded sub-assemblies fit together and checked before they ship

Parts arrive at the weld table from Sheet & Plate Laser Cutting and Tube & Pipe Laser Cutting with holes, slots, and bevels already in place, so fit-up is self-locating rather than measured by hand.

MIG vs TIG vs Laser Welding at WeFab

WeFab matches the welding process to the part: MIG for mild steel structural and production work, TIG for stainless, aluminum, and appearance-critical mild steel, and laser welding for thin mild steel, stainless, and aluminum up to 1/8 in where low distortion matters.

Process	Stations	Typical use
MIG (GMAW / MCAW)	21	Mild steel structural and production welding
TIG	2	Stainless, aluminum, mild steel
Laser welding	2	Mild steel, stainless, aluminum up to 1/8 in
SMAW (stick)	Qualified process	Applications where the WPS calls for it
Robotic truss cell	1 (custom, NRTC)	Repeat truss production

MCAW (metal-cored arc welding): a wire-fed process that uses a tubular wire filled with metal powder instead of solid wire. It deposits weld metal faster than solid-wire MIG with little slag, which suits heavier structural joints.

Welding is the core of our shop. Twenty-one MIG stations run assemblies in parallel, letting us scale production runs and absorb urgent work without disrupting committed dates. Dedicated TIG stations handle stainless and aluminum, and our laser welding stations deliver low-distortion, high-speed welds on thin-gauge and cosmetic work. Because parts arrive at the weld table laser-cut and self-locating, assemblies go together accurately and consistently, unit after unit.

Materials & Thickness Range

WeFab welds mild steel, stainless steel, and aluminum. Single-pass welds run to 1/4 in, and multi-pass welds have been completed on plate up to 4 in thick. Copper, nickel alloys, and other exotic metals are outside the shop’s welding scope.

Specification	Range
Materials welded	Mild steel, stainless steel, aluminum
Single-pass weld	Up to 1/4 in
Multi-pass weld	Up to 4 in completed to date
Laser weld thickness	Up to 1/8 in
Qualified procedures	60+ WPS
Heavy handling	88,000 lb overhead bridge crane; 10 jib cranes at 1,500 lb each

Galvanizing and powder coating are subcontracted after welding; WeFab coordinates both so the assembly returns finished.

Our CWB W47.1 Division 2 Certification

Welding at WeFab operates under South Essex Fabricating Inc.’s CWB W47.1 Division 2 certification, Company Code DENDE1. WeFab is SEF’s fabrication division, and the certification covers weld work in the Leamington shop, subject to recurring CWB audit.

WeFab maintains 60+ qualified weld procedure specifications. Welders work in GMAW and MCAW, SMAW is also qualified, and procedures are matched to the material and code the project specifies.

CWB W47.1 Division 2: Canadian Welding Bureau certification for companies that fusion-weld steel. Division 2 requires qualified procedures, qualified welders, and documented welding engineering oversight, verified through recurring CWB audit, so weld quality is governed by a national standard, not shop habit.

Weld procedure specification (WPS): a written, qualified recipe for a specific weld: process, filler, position, joint, and parameters. A library of 60+ WPS means common joints on a drawing usually already have an approved procedure before welding starts.

In-House CWI Inspection and Third-Party Testing

Weld inspection at WeFab is led by Jacob Froese, a CSA W178.2 Level 1 Certified Welding Inspector (CWB REG # 4046083). Third-party inspection is performed by the CWB inspector and GS Inspections, and NDT is subcontracted.

Procedure selection: joints governed by the project’s welding code are matched to a qualified WPS before fit-up.
Fit-up check: laser-cut parts are tacked and checked against the drawing.
Welding: each joint goes to the MIG, TIG, laser, or robotic station suited to its material and thickness.
Visual inspection: the on-staff CWI inspects welds for size, profile, and defects.
Third-party inspection and NDT: when the specification calls for it, ultrasonic, radiographic, penetrant, or magnetic-particle testing is arranged through subcontracted NDT providers, with third-party inspection by the CWB inspector or GS Inspections.

WeFab does not run NDT in-house. Saying so up front lets project teams plan their inspection and test plan with accurate lead times.

Service Area: Ontario First, US Projects by Arrangement

WeFab delivers welded assemblies across Ontario. Our core service area is Windsor-Essex, London, Kitchener-Waterloo, Hamilton, and the Greater Toronto Area, direct from our Leamington shop on our owned flatbed and step-deck fleet, with US deliveries arranged through a customs broker.

Sectors served include data centre, warehouse and distribution, manufacturing, power and utility, agricultural infrastructure, industrial, and heavy industry. Food processing is not supported.

Frequently Asked Questions

Is WeFab CWB certified for welding?

Yes. Welding at WeFab operates under South Essex Fabricating Inc.’s CWB W47.1 Division 2 certification, Company Code DENDE1. WeFab is SEF’s fabrication division, and the certification covers weld work in the Leamington shop, subject to recurring Canadian Welding Bureau audit.

How thick can WeFab weld steel?

Single-pass welds run up to 1/4 in, and WeFab has completed multi-pass welds on plate up to 4 in thick. Laser welding handles mild steel, stainless, and aluminum up to 1/8 in, where low heat input keeps thin parts flat.

Does WeFab weld stainless steel and aluminum?

Yes. Two TIG stations weld stainless steel, aluminum, and mild steel, and two laser welding stations handle all three materials up to 1/8 in. Copper, nickel alloys, and other exotic metals are not in WeFab’s welding scope.

Does WeFab do non-destructive testing in-house?

No. Ultrasonic, radiographic, penetrant, and magnetic-particle testing are subcontracted. WeFab’s on-staff CSA W178.2 Certified Welding Inspector performs weld inspection in the shop, and third-party inspection is handled by the CWB inspector and GS Inspections.

Request a Welding & Assembly Quote

Send drawings, a 3D model, or a weld map to the WeFab estimating team for an industrial welding and assembly services quote anywhere in Ontario. Note any required WPS, inspection, or NDT so the quote reflects the full test plan.

Call 548-919-0125 or email sales@wefab.ca to start a project.