Trusted for 50 Years.
Built to Last.

Welcome to Giancola Aluminum, the leading exterior siding contractor in Ontario, trusted by homebuilders and developers for more than five decades.

We specialize in the supply and installation of high-quality vinyl siding, aluminum siding, copper, and zinc exterior systems. Our services include siding, soffit and fascia installation, eavestrough systems, gutters, and custom railings, all built to meet the demands of modern construction.

As a top-rated vinyl and aluminum siding supplier in the GTA, we’ve proudly supported new home construction across Ontario, working with some of the country’s most respected builders. Whether residential or commercial, we bring craftsmanship, efficiency, and long-term value to every project.

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Your Residential Aluminum & Vinyl Architectural Experts

Work with a Trusted Leader!

When you work with Giancola Aluminum Contractors Inc., you get the best possible results from an industry leader. We are always ready to help you get started. Call us today or get a fast quote using the "Book a Free Consultation" button at the top of this page.

Call Us Today:

(416)­ 674-5226
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  • "Tribute Communities has contracted Giancola Aluminum almost all of our siding, aluminum and eavestrough work for 30 years. Giancola Aluminum has been a valued subcontractor partner. They are professional, timely and do quality work."

    M. David Speigel
    Executive VP, Tribute Communities

  • "Over the years I have had the opportunity to work with Giancola Aluminum Contractors and I highly recommend them for their professional dealings, their attention to detail, knowledge of their business, quality of work, their willingness to review the plans ahead of time, anticipate problems and recommend solutions."

    Anita Yee
    Vice President, Purchasing and Contracts, Mattamy Homes

  • "They’re always there to support our site teams providing feedback and being proactive in mitigating any issues that may arise. I see this relationship being an integral part of our organization for many years to come."

    Erminio Labriola
    Brookfield Residential ON

  • "Giancola has been instrumental in providing new and exciting materials to help us market and sell our homes across the GTA. The quality of the material and long-term durability is second to none. The product and installation service is top in the industry. We have tremendous trust with Giancola as a partner on many projects."

    Alexander Libfeld
    Tribute Communities

  • "They have been a very trustworthy, dependable contractor and trade. Giancola has always been a leader in being innovative with new products and it's been great to show them our designs, give us their input and be able to adapt and come up with a great product for our homes so that our homeowners can enjoy a good quality lasting product in their home."

    Jeremy Baruch
    Paradise Homes
Proud Members of
BILD, OHBA and RSCA
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Siding modern exterior

Get a Full Aluminum & Vinyl
Architectural Consultation

Complete the form below and one of our aluminum & vinyl architectural experts will call you back to discuss everything from design, manufacturing, installation, warranty, maintenance, and more.