Lifetime Warranty on Candian Made Vinyl Windows & Sliding Patio Doors - Free Estimates - Blueprints Welcome

High Quality Products & Professional Service

We take pride in the products & brands we sell and provide a professional, friendly experience to our clients.

What We Offer..

We specialize in vinyl & aluminum windows, entry doors, patio doors and motorized screen & awning solutions. Exterior Supply Co. offers a wide range of high qualty, certified home exterior products, from measure through install.

Whether it's a small project, a large custom project from blueprints or product supply only, our experienced team is here to assist you.

Let us help with your next window or door project.


High Efficiency Windows & Doors

Although these grants & rebates aren't ours to give, we'd be happy to explain the process & help you get the process started.

Our Energy Star certified windows with high efficiency glass packages will meet all of your window energy requirements.

Send Us Your Plans

With decades of combined experience working with homeowners, builders, contractors, engineers, architects and carpenters, we are confident we can help you with your next window or exterior door project.

Send us your drafts or blueprints and we'd be happy to put a window schedule together for you.


Professional Service & Installation

With our in house crew & network of contractors, we can provide professional installation services for most of the products we offer.

Service Area

Currently Supplying & Installing Windows, Doors, Screens & Awnings in the Following Areas:

Hanover | Owen Sound | Palmerston | Walkerton | Goderich | Meaford | Collingwood | Thornbury | Grand Valley | Mount Forest | Elora | Fergus | Rockwood | Guelph | St. Jacobs | Harriston | Listowel | Arthur | Mildmay