top of page

Louwes is currently open from Monday to Thursday, 8 am to 5 pm, Fridays from 8 am to 4 pm, and Saturdays from 9 am to 1 pm. Closed Long Weekends. Email orders and requests for quotes to: Please check our website regularly for changes and updates.



Louwes Windows & Siding is a family owned and operated business that has served the Niagara region for over 55 years. Bill, Joanne, and Patricia represent the second generation of ownership, continuing on a proud tradition of providing homeowners in Southern Ontario top-quality exterior renovation solutions started by their father back in 1966.

From replacing windows and doors to installing siding and soffit, we exist to make your home a more comfortable place.


“We would like to thank your staff for a job extremely well done. We are in 'awe' of how are house looks and have absolutely no reservations of recommending Louwes Windows & Siding to our family, friends and neighbours.”
- Kim & Rob

“Love the windows, they look great! The crew cleaned up when they were finished. Recommended you to our neighbours.”
- Mr. and Mrs. W.

“I am so happy with my windows, they look beautiful. Everyone was polite and professional. I would highly recommend Louwes Windows & Siding!”
- Shannon

“We're very pleased with the quality of both the windows and the installation.”
- Allan and Charlene

"I wanted to express my thanks for my recent window purchase and installation. The window more than exceeds our expectations, the quality is outstanding and installation top notch."
- B. A. Smith in Grimsby

"We had five windows installed and are very pleased with the product and service. We will enjoy these windows very much and would like to thank you for the wonderful job."
- M. and J. Tutecky in Beamsville

"We wanted to say a big "Thank You" to all we had the privilege of dealing with...we will be pleased to recommend your company to anyone who might be considering replacing their windows or doors."
- R. and E. Chrysler in St. Catharines

"Many thanks...our kids are thrilled."
- M. and J. Bradbury in Port Colborne


The Niagara region is where we work, live, and play. We are currently serving homeowners in St. Catharines, Vineland, Grimsby, Beamsville, Jordan, Niagara on the Lake, Niagara Falls, Thorold, Pelham, Fonthill, Fenwick, Ridgeville, Welland, Wainfleet, Grassie, Fort Erie, Dunnville, and surrounding areas.

Please don't hesitate to contact us for a free estimate on any of our products and services.

bottom of page