With quality products, Windmill Window and Door can give everyone, in Muskoka and the surrounding area, choices for all your window and door needs for either commercial or residential properties.



At Windmill Window and door, we offer a range of options for your windows, residential or commercial, from installation, glass replacements, and more.



Whether your space is residential or commercial, Windmill Window and Door can provide you with a range of services from insulated, storm, patio, enclosures, and more.

about us


Owner and operator Gary Dam has almost 30 years experience in the glass and window trade and is a certified architectural glass and metal technician.

Gary started working in the window and door industry while attending High School sweeping floors. He then had the opportunity to attend George Brown College and in 1993 he completed the Glazier and Metal Mechanic Apprentice Program. Upon completion he continued to work for various companies before starting is own business, Gary Dam Window and Door. Gary closed his business in Guelph after 9 years to relocate to Huntsville. After a couple of years of working for another window company, Gary decided to start his own business again. In January of 2012 Windmill Window and Door was born doing small jobs and sub contracting for other companies. Eight years later (January 2020) Gary incorporated to what is now known as Windmill Window and Door Ltd and opened a showroom located in Huntsville.


Gary was professional; timely and responsive. He did what he said he would, when he said he would. We love the new windows and appreciate the suggestions Gary made. We would highly recommend Windmill Window and Door.

Karen Watkinson

This is a great little company, where quality service and craftsmanship really do mean something. Gary was always professional, yet friendly while working with us to choose the best windows for our needs and budget. He made several trips some distance from town to measure, remeasure and make sure he knew exactly what we wanted, no surprises. They pulled all the old windows, installed the new ones, trimmed out all windows and left no trace. Any debris, sawdust, even some of my dust was picked up and carted out. Installation really 'is a breeze' Thanks Gary and crew for a job well done.

Nj McGreevy

Very professional and responsive crew. Very knowledgable about installation and no corners cut. Would absolutely use again and recommend

Taylor L

Gary, James and Mitchell are a pleasure to deal with. They are highly professional and personable, going out of there way to please. Installing my 2 large patio doors proved more challenging than anticipated and they solved the problems well. I wish there was a 6 star rating.

John Palumbo

An excellent, professional, timely job was done by Gary and staff. Above and beyond in all respects. I will be a repeat customer!

Gregory Boden

Excellent service. James and Mitchell delivered excellent service. They were efficient, polite and cleaned up after they were finished. The quality of the door and and windows are excellent. I highly recommend Windmill Windows.

Barbara McCoy

Gary is a perfectionist, which is just what you want in someone doing precision work like window and door replacement. I know this about him because he replaced all the windows I needed replaced over the past 5 years. He's reliable, easy to work with and shows up when he says he will - AND he's affordable!

Steve McDonough

After multiple companies told me that my door threshold could not be fixed, Gary fixed it. Gary, Mitchell and crew replaced 19 panes of glass in a morning. No mess. No wasting time. Everyone was happy. The areas of the house, where they worked, were cleaner when they left than when they arrived. And new glass lets me see outside, and probably dust inside. Windmill Window and Door Ltd. are on my list of who I trust. Thank you Windmill Window and Door Ltd.

Lorraine Alles

Gary and his team were very professional and did an amazing job replacing every window in my house. They left the jobsite super clean at the end of each day, so you couldn't hardly tell they had been there at all. And they did a beautiful trim job at the end. Very happy!

Lauren Spivak

My wife & I just had 2 sliding doors replaced. Gary and his team were very professional and safety conscious. During this time of Covid-19 they worked with their masks on and kept a safe distance from us. They arrived on time, worked diligently and cleaned up very effectively. I highly recommend them to anyone who is in need of window or doors.

Glen Cowing

windmill window door


No - sometimes we may have mis-measures or cancelled jobs. There are no standard sizes so it's hard to stock product. They are all custom made to size.

"Installation is a Breeze"


Our Location

28 Dairy Lane Unit #2
Huntsville, ON P1H 1T4

Hours of Operation

Monday to Friday
8am to 5pm