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About Portex

Built in our own shop in Strathroy, Ontario

Portex Building System makes custom conventional-steel portal-frame buildings for manufacturing, distribution, agriculture and aviation, engineered, detailed and fabricated in Strathroy, Ontario. Every building uses conventional steel and custom engineering rather than pre-set templates.

Conventional steel. Custom engineered. Built for generations.

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Inside the Portex shop: two yellow overhead bridge cranes span the bay above lengths of square steel tube, a band saw and a flatbed truck being loaded at the far door.
The Portex shop in Strathroy, Ontario.

Who we are

Steel buildings, from one team

Our work is engineering, detailing and fabricating conventional steel. Portex brings that work to you as a complete building system.

We engineer, detail and fabricate the portal steel frame, then supply it with the metal roof and siding and provide erection support. One coordinated team takes your project from concept to completion.

What we supply

  • Portal steel frameConventional steel, engineered for strength, efficiency and long clear spans.
  • Engineered designCustom design of the structure, tailored to your project.
  • Metal roofingMetal roofing systems built to perform and last.
  • Metal sidingDurable metal siding for a clean, professional finish.

Behind the steel

People. Precision. Performance.

Every Portex building starts with skilled people, precision fabrication and a commitment to quality. Our Strathroy shop does the fabrication, with precision fit-up and quality control.

A welder in a helmet and protective jacket welds a steel member on stands, sparks flying, inside the shop.
Welding a steel member in the Strathroy shop.

  • Real fabrication

    Built by experienced steel professionals.

  • Quality driven

    Accuracy, consistency and craftsmanship matter.

  • Built to last

    Every member supports a stronger final structure.

Strathroy, Ontario

Local manufacturing. Local support.

Portex buildings are engineered, detailed and fabricated by our team in Strathroy, Ontario.

Why it matters

  • Ontario-based engineering and fabrication
  • Conventional steel portal frames built to your requirements
  • Better coordination from design through erection
  • Reliable quality control and responsive project support
  • A local team that understands your market
Two ironworkers in boom lifts guide a crane-hung steel beam onto the top of a column, against a cloudy sky.
Setting steel at Jetstream Road, London, Ontario (2026).
  • Designed in OntarioClose collaboration from concept to completion.
  • Fabricated in StrathroyBuilt in our own shop on Industrial Road.
  • Built for Canadian projectsPractical solutions for real project needs.

The Portex process

Plan. Design. Fabricate. Build.

One coordinated team from concept to completion.

  1. Consult

    We talk through what the building is for, and help with budgeting and planning early.

  2. Design and engineering

    We design and engineer the structure around your project requirements.

  3. Detailing

    Every member is detailed in-house before it reaches the shop floor.

  4. Fabrication

    Fabrication in our Strathroy shop, with precision fit-up and quality control.

  5. Delivery

    Steel and materials arrive on site, ready to build.

  6. Erection and support

    We provide erection support as the portal steel frame, metal roof and siding go up, and stay on hand to support you.

Talk to us

Tell us about your building

From concept to completion, Portex supplies a building system engineered around how you work. Tell us about your project and we will prepare a quote for a custom Portex building.

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Shop
1 Industrial Road
Strathroy, ON N7G 4J5