About A-1 Siding & Windows Niagara: A Family Business Built Over 35 Years

A-1 Siding & Windows Niagara Ltd. is a family-owned and operated exterior renovation company based in Stoney Creek, Ontario. For over 30 years we’ve been helping homeowners across the Niagara Region and Hamilton area protect and improve their homes with quality siding, soffit and fascia, eavestrough, and more.

Our Croatian Roots

Our story starts long before the first siding job. Over 35 years ago, our founders came to Canada from Croatia, settling in the Niagara Region and building a new life from the ground up. Like many immigrant families of that generation, they arrived with a strong work ethic, a commitment to doing things properly, and a determination to build something lasting for their family. That mindset became the foundation of A-1 Siding & Windows Niagara.

Today, the founders are still actively involved in the business they built, and their first-generation Canadian children have grown up alongside the company and now work alongside them — carrying forward the same values of honest work, quality craftsmanship, and treating every customer’s home like it matters. It’s a genuinely multi-generational family business, and that continuity shows in how we operate: no corporate turnover, no revolving door of subcontractors, just a family that’s been showing up in the Niagara Region and Hamilton area for over three decades and intends to keep doing so.

We started as a small home business in Thorold and grew through word of mouth — one satisfied customer at a time. Today we serve communities from St. Catharines and Niagara Falls to Grimsby, Welland, Fort Erie, and the greater Hamilton area. We’re still family-run, and that means every job gets the same personal attention it always has. You can see the full list of communities we serve on our service areas page.

We specialize in vinyl and aluminum siding, aluminum soffit and fascia, seamless eavestrough, downpipes, Alurex Gutter Guard, and windows, doors, and exterior railings. We work with trusted Ontario brands including Kaycan, Gentek, and Mitten — manufacturers chosen specifically because their products are built to withstand Ontario’s freeze-thaw winters and humid summers.

What sets a family-owned company apart is accountability. When you call A-1 Siding & Windows Niagara, you’re not routed through a call centre or handed off between departments — you’re dealing directly with the people who own the business and stand behind every job. We built our reputation across the Niagara Region and Hamilton area one referral at a time, and we intend to keep it that way.

Why choose us:

• Over 30 years serving the Niagara Region and Hamilton area
• Family-owned and operated across generations — you deal with the owners directly
• Experienced craftsmen dedicated to quality workmanship
  We guarantee all our work
• Free estimates with no obligation

Ready to get started? Call us at 905-662-5757 or 905-680-2833, or visit our contact page to request a free estimate.