40+
Years fabricating
Our Work
Steel & metal, built to last
Four decades of structural steel and custom fabrication — engineered in-house, CWB-certified welding, installed on site.
Structural steel, stairs and railings, stainless and aluminum — precision-fabricated to spec and installed across Hamilton. 40+ years of CWB-certified craftsmanship for commercial, industrial and residential projects.
Custom, contract and design-build metal fabrication — engineered, fabricated in our shop, and installed on your Hamilton site.
Complete structural steel packages — columns, beams, framing and connections for commercial and industrial buildings.
Custom staircases, guardrails, handrails, ladders and gates — including curved stairs and stone-tread designs.
Engineered mezzanine platforms and stair towers to add usable space and safe access to any facility.
Certified lifting beams and structural steel built to spec for material handling and rigging applications.
Beams, posts and custom steelwork for custom homes and residential developments — engineered and code-ready.
Stainless components, aluminum work, canopies, trellises and architectural metal — TIG-welded to a finish.
For over 40 years, Rosmar Welding has fabricated structural steel and miscellaneous metals for top general contractors across Southern Ontario and the GTA. Every job is engineered, certified and built to last.
Based in Guelph, Rosmar Welding fabricates and installs structural steel throughout Hamilton and across Southern Ontario. Whatever the city, if your project needs certified steel, we deliver.
~45 minutes from downtown Hamilton — servicing job sites across the region.
Start Your ProjectFour decades of structural steel and custom fabrication — engineered in-house, CWB-certified welding, installed on site.
From observation towers to casino builds, our steel stands behind recognizable projects across Ontario.
"We seamlessly blend old-world craftsmanship with cutting-edge technology — so every structure we build is one you can rely on."
Yes. Rosmar Welding fabricates and installs structural steel and custom metal throughout Hamilton and Southern Ontario — including Stoney Creek, Ancaster, Dundas, Burlington and Grimsby — from our Guelph shop, family-owned and operating since 1984.
Structural steel building structures; miscellaneous metals such as stairs, guardrails, handrails, ladders and gates; mezzanines and stair towers; lifting beams; and stainless steel and aluminum architectural metalwork.
Yes. Our welders are certified to CWB W47.1 (carbon and stainless steel) and CWB W47.2 (aluminum), and every project is backed by in-house engineered shop drawings.
Commercial, industrial, institutional and residential — from retail, offices and warehouses to schools, healthcare, civic buildings and custom homes.
Send your drawings or a project description through the contact form, or call (519) 822-9905, Monday to Friday, 7am to 4pm. We'll review scope, engineering and timeline and reply quickly.
Our fabrication shop is at 425 Elizabeth St., Guelph, ON N1E 2Y2. We deliver and install across Hamilton and Southern Ontario.
Send us your drawings or a description of the job. We'll review scope, engineering and timeline and get back to you fast.