R M W Exteriors Inc
“The designs and quality construction, including tricky dormers on a mansard roof, have completely transformed the house and the end result has exceeded my expectations.”
Best Window Installers in Waterloo, ON
15 companies listed · 5 in Waterloo · 1 open 24/7 · 7 open weekends · 9 rated 4.5+
Data verified October 16, 2026
Dewar Home Improvements
“Dewar did an amazing job on our bathroom renovation as well as some new windows throughout the house.”
3 Eurowindows Ltd
“Very good European tilt and turn windows, high quality and very reasonable pricing.”
Eastbridge Craftsmen
Smith Glass
“They've done an amazing job with our windows, quality of glass, services and overall customer satisfaction all top-notch!”
Dan's Discount Windows & Doors
“Dan's was on time, quick, thorough, in fact meticulous with everything from the foaming, to the caulking, to the job clean up.”
Listed for homeowners in and around Waterloo, ON, these 15 companies fit and repair windows. Frame materials, glazing options and any credentials shown are taken from company websites; the customer lines are quoted from public reviews.
Area overview: Waterloo, ON
5 of the 15 companies we list are based in Waterloo; the other 10 serve Waterloo from Kitchener (6 km) and Bloomingdale (6 km). The companies on this page are rated from 3.9 to 5.0 across 981 reviews; 6 have 50 or more reviews and 9 are rated 4.5 or higher. When customers rate these companies on specific qualities, they most often praise quality (88%), responsiveness (80%) and professionalism (76%). The topics that come up most in reviews of the companies on this page are "price", "estimates" and "cleanliness". 1 is open around the clock; 6 are open on Saturdays and 3 on Sundays. Domain records put 8 websites of the companies on this page at ten or more years old; the oldest dates from 1997. 1 offers emergency call-outs; 4 offer financing or payment plans; 6 give free estimates; 4 are family- or locally-owned and 2 list coupons or special offers. We have a website on file for all 15 of the companies on this page; 14 publish a contact page and 13 list a public email. We count these figures across the companies on this page; distances are straight-line, and hours and prices change, so confirm the details with the company before you book.
Do the listed window companies all have premises in Waterloo?
5 of the 15 give an address in Waterloo itself; the rest serve it from within 10 km. A showroom often covers a whole region, so distance matters less than who does the installing. Ask whether the fitters are employees, and how a callback in the middle of winter is handled.
Howald Windows & Doors
“The price was competitive, the options were clearly presented, and the actual installation went well.”
Pickles Home Exteriors -Windows
“They are extremely customer focused, providing me with different options to choose from while answering ALL questions or concerns that I had.”
Bavarian Window Works
“I'm happy that I was able to get a unique style while fitting into my 1950s house - the colours are just what I was looking for.”
Wheeler Windows
“I really can't say enough good things about them, every time they visit us, we are extremely pleased with the work completed on time and at a reasonable price.”
PM Windows & Doors
“Very professional throughout all of project (replacement of 4 windows), from initial meeting with Kevin to installation.”
LP Platinum Roofing & Exteriors
“After reading LP Platinum's reviews and receiving a quote from them, we were more than happy to choose them to do our roof.”
Ecotech Windows & Doors
“Friendly staff and all the work was done correctly.”
Golden Windows Limited
“Very satisfied with the quality and the great service from the sales team.”
The Great Egress Company
“If you need window installation work done, I highly recommend these guys and their high level of expertise!”
Why these companies made our list
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