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Why Choose St Clair Windows and Doors
Your Local Window & Door Experts
At St Clair Windows and Doors, we are dedicated to providing top-quality windows and doors along with personalized customer service. Our owner, a Red Seal Certified carpenter, helps sell, plan, and execute each and every project. When it comes to personal service, we have something the other guys can't touch. Ask your neighbours, they know us.
2007
Serving You Since
20k
Happy Clients
100%
Facebook Rating
Sarnia-Lambton, ask your neighbours. They know us.
I had St.Clair Windows and Doors at my house to do windows, i cannot believe how beautiful they are, the crew was amazing!! My windows were the old wooden kind, now I have beautiful windows in my house. If you need windows or doors you need to call these guys. 10 out of 10
Kathy Fangeat
2025-08-05
We had an all around excellent experience with St Clair Windows and Doors. They installed a four panel 10 foot sliding door and three casements. I'm sitting here enjoying the breeze with them all open! So glad I had them do the work. They paid close attention to detail and did a great job protecting my new floor while doing the work. They went the extra mile on the brick work after cutting in for the new slider. Great crew working for St Clair. Everyone was polite, respectful and neat and tidy all through the installation and cleanup afterwards. Thanks for a great experience.
David Lyon
2025-07-18
Amazing company to do your new windows and doors fast and amazing install also very knowledgeable when it comes to windows and what’s best for us as a customer… highly recommend Jonny row and team did an outstanding job. Thankyou again at Clair windows and doors.
Kristopher Knowles
2025-06-12
Professional Certifications
St. Clair Windows and Doors is Certified...




Window & Door Installations
Customized Solutions
Expert Consultations
Professional Installations
After-Install Support
Locally Made Products
Quality Craftsmanship
Limited, Transferable Lifetime Warranty