St. Thomas

Window & Door Installations


Monday-Friday 8:00am-5:00pm
Saturday 9:00am-12:00pm
or by appointment

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Why Choose Us

The team at A1 Unique Installations is committed to customer service, while drawing on our experience to ensure your windows and doors are installed to the highest standard. If it’s security or energy efficiency you're concerned with, A1 Unique Installations has the solutions.

St. Thomas Windows
St. Thomas Vinyl Window Designs
St. Thomas Strassburger Windows
Window Installation Service


Windows & Doors

A1 Unique Installations has been in the replacement window and door business for over 38 years, and we have serviced hundreds of residential and commercial properties throughout St. Thomas, London and surrounding area. We know our customers expect the best products and we are committed to delivering only the "best" to our customers.

Our Work


We're proud of the work we've done for our customers over the years. Have a look at our previous window and door installations. All of our work is performed by certified Window Wise™ installers.

Customer Reviews


We just had A1 install a bay window. Their quote was fair so we decided to go with them. Their crew spent the day installing the window. I was at home so I was able to watch them work. Their attention to detail, work ethic, and the quality of the work they did was outstanding. The clean-up afterwards was very thorough both inside and out. I would highly recommend this company for any replacement windows work. Awesome!

Dan Manherz

I've used A1 Unique Installations a couple of times, and I've used some of their competitors.

They're not the cheapest, but I would say, you get what you pay for. Their craftsmanship, and attention to detail are second to none. You really see it in the little things. The way they are always cleaning and vacuuming, the detail in how they cap around a window or the fit of their trim. They just do that little bit extra, in my opinion.

Very satisfied. Would highly recommend.

Ken McLaughlin

Best Window Company around.

Love the work and followup done

Dave Kirkland

Great windows, great workman ship. on time, stuck to quote, cleaned up after. windows look great 5 years later!

Ken Vr

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A1 Unique Installations - Window and Door

16 Barrie Blvd, Unit 5, St Thomas, Ontario N5P 4B9

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