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Windows & Doors in St. Catharines, ON

St. Catharines is the largest city in the Niagara Region, known as the Garden City for its abundant parks and green spaces. The city features a revitalizing downtown, established neighbourhoods like Grantham and Port Dalhousie, and a growing university presence with Brock University.

St. Catharines has a significant number of older homes from the early-to-mid 20th century with aging windows. The Niagara region's lake-effect weather creates challenging conditions for window performance, and modern triple-pane replacements provide essential protection against cold, wind, and moisture.

Why Choose Panes for Your St. Catharines Home?

  • Factory-direct pricing — save 20-30% by buying directly from the manufacturer with no middleman markups.
  • 14-day production — custom windows and doors built to your exact specifications and delivered fast.
  • 25+ year warranty — industry-leading coverage on materials, glass, and craftsmanship for lasting peace of mind.
  • Free in-home estimates — a Panes specialist will measure, consult, and quote your project at no cost or obligation.

Window & Door Services in St. Catharines

Panes Windows & Doors provides a full range of window and door services to homeowners and builders in St. Catharines and the surrounding Greater Toronto Area area. We offer new construction windows for builders working on custom homes, townhomes, and multi-family developments. Homeowners looking to upgrade can choose from our premium replacement windows designed for quick, clean installation with minimal disruption. In addition to windows, we supply fiberglass and steel entry doors to boost curb appeal and security, as well as sliding and multi-track patio doors that bring natural light into your living spaces. All products are available supply-only for contractors or with full professional installation by our experienced crews.

Energy Efficiency for ON Climate

St. Catharines benefits from the Niagara microclimate which moderates temperatures somewhat, but winters still bring periods below -15C with lake-effect snow from Lake Ontario and Lake Erie. Our triple-pane and double-pane vinyl windows feature Low-E glass coatings, argon gas fills, and multi-chamber frames engineered to minimize heat transfer. This helps keep your St. Catharines home comfortable year-round while reducing heating and cooling costs. Energy-efficient windows can also qualify for local utility rebates and federal tax credits, putting money back in your pocket.

Contact Panes Windows & Doors at 866-407-2637 for a free, no-obligation quote in St. Catharines.

Our Products

  • Vinyl Windows
  • Entry Doors
  • Patio Doors

Window Types

  • Casement Windows
  • Double-Hung Windows
  • Single-Hung Windows
  • Bay Windows
  • Bow Windows
  • Picture Windows
  • High-Fix Windows
  • Single Slider Windows
  • Double Slider Windows
  • Awning Windows
  • Shaped Windows
  • Window Comparison Guide

Education Guides

  • Window Performance Lab
  • Window Type Matchmaker
  • Glass & Coatings Explorer
  • Door Security & Materials Guide
  • Smart Buyer's Pricing Guide
  • Window Condensation Guide

Nearby Service Areas

  • Niagara Falls, ON
  • Grimsby, ON
  • Hamilton, ON
  • Burlington, ON

View All Service Areas

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