I Rooms Incorporated
“I Rooms installed a metal roof for me on my custom home.”
Best Siding Contractors in Thorold, ON
24 companies listed · 4 in Thorold · 3 open 24/7 · 13 open weekends · 21 rated 4.5+
Data verified October 19, 2026
D.F. Brown Roofing
“Highly recommend them for a quick fix and to make it right”
Efficient Exteriors
“I highly recommend Efficient Exteriors for all of your window needs for new construction and window replacement in existing homes.”
Leave It To Me
Multi Service Maintenance
Niagara Roofmasters
“Taylor was very professional over the phone and provided great, detailed information about a gutter problem I was having.”
Listed for homeowners in and around Thorold, ON, these 24 companies work on exterior walls. Details about materials, colour ranges and insulation options are drawn from each company's own site, and the review quotes underneath are public reviews.
Area overview: Thorold, ON
4 of the 24 companies we list are based in Thorold; the other 20 serve Thorold from towns including St. Catharines, Niagara Falls and Welland. 23 of the companies on this page have a rating, from 4.3 to 5.0 across 1,097 reviews; 10 have 50 or more reviews and 21 are rated 4.5 or higher. When customers rate these companies on specific qualities, they most often praise professionalism (95%), quality (86%) and responsiveness (81%). The topics that come up most in reviews of the companies on this page are "price", "estimates" and "cleanliness". 3 are open around the clock; 13 are open on Saturdays and 3 on Sundays. The services the companies on this page list most often on their websites are siding (5), eavestrough (3), gutter guards (2), soffit & fascia (2) and windows (2). 1 lists staff certifications (GAF). 12 have ten or more years of experience, the longest 20 years. 4 offer emergency call-outs; 3 offer financing or payment plans; 16 give free estimates and 1 is family- or locally-owned. We count these figures across the companies on this page; hours and prices change, so confirm the details with the company before you book.
How many of these companies publish a website?
Websites are listed for 22 of the 24 companies on this page. Open them and look for finished houses nearby, ideally after a winter or two rather than on handover day. Close-up photographs around windows and at corners show the standard of the trim work, which is where a rushed job gives itself away first.
AJT Roofing and Contracting
“I asked Adam to repair gutters of my property and he did a very clean and professional job.”
Great Northern Home Exteriors Inc.
“We ordered a new front door and sliding door right before the pandemic and unfortunately because of supply issues it took a long time but Clodette was amazing throughout the whole process.”
Permanent Siding & Windows
“I found this company to be very helpful with recommendations for the best products for my needs.”
JD Roofing Inc.
“In than promised and in this day age where most don't even show up, it was a nice change.”
McPherson Roofing
“I would highly recommend them to do your roofing needs as they were quick, honest and reliable..”
Noble Roofing
“Great team, using their professional knowledge to guide me threw the process.”
Hamblet's Roofing Siding Windows
“While we were meeting with our Builder, John Hamblet himself appeared with a choice of roof shingles in hand, and actually started and completed the entire job with his remarkable team over the Christmas/New Years week”
Tip Top Exteriors
“I am extremely pleased with the work done by Tip Top Exteriors and I would highly recommend them!”
Roof Wizard
“They came promptly accessed the repair came back with material and got the job done in the rain.”
Precision Roofing
“Can't begin to say how happy I am with the work done !”
Dykstra Brothers
“Dykstra Brothers Roofing did a great job on my flat roof/balcony repair.”
Guenther Metal Roofing
“But he was willing to do a small repair in hopes of solving our problem for the time being and avoid higher cost repair at least for now.”
JPG Roofing & Construction
“Their salesman Mark took the time to explain everything when he gave me the estimate so I understood the price breakdown, the products they were using, the warranty and the installation process.”
Gemini Windows
“Roof was patched up to stop the leak.”
4wards Exteriors Inc
“We had partial siding, fascia, soffit, eavestrough and pot lights done on our house and are ecstatic with the results.”
Louwes Windows & Siding
“Friendly staff, quality windows, great installers, fast and efficient.”
Blampin Roof Tops
“They worked quickly, offered reasonable pricing, and proved to be extremely reliable.”
Scott Windows & Doors
“He turned a small dark area into a spacious light room which is a pleasure to live in.”
Why these companies made our list
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