Bulldog Roofing
“Clay spent the time to explain the process, take detailed photos, meet with the insurance adjuster, and point out the hail damage not only on the roof, but also non roof-related damage on our property.”
Best Siding Contractors in Longmont, CO
24 companies listed · 16 in Longmont · 2 open 24/7 · 13 open weekends · 21 rated 4.5+
Data verified October 27, 2026
Colorado Roof Toppers
“His estimate was very competitive with the others I had received; but with Scott I sensed integrity, and that he would be more dedicated to detail than the other contractors”
Westpro
“When the weather permitted, they performed a water pressure test and found that 1 nail (our of 1,000's on our roof) had popped up and was cause of the leak.”
Greenpoint Roofing
“He showed up on time and prepared, kept me appraised of the schedule and details, explained the backlog of permitting and apologized for the rain delays (which were not his fault, of course)”
Roof Check Inc
“We just had our roof replaced by Roof Check because of hail damage and I cannot express enough the gratitude that my husband and I have for this company.”
Stone Creek Roofing & Solar
“Carmelo handled the entire project very professionally, his attention to detail and patience in navigating the insurance claim process has helped me tremendously.”
Listed for homeowners in and around Longmont, CO, these 24 companies work on exterior walls. Details about materials, color ranges and fade cover are drawn from each company's own site, and the review quotes underneath are public reviews.
Area overview: Longmont, CO
Of the 24 companies we list here, 16 are in Longmont itself and 8 come from towns including Boulder (2, 13 mi), Brighton (2, 19 mi) and Mead (1, 7 mi). The companies on this page are rated from 4.2 to 5.0 across 3,044 reviews; 15 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 quality (89%), professionalism (86%) and responsiveness (82%). 2 are open around the clock; 12 are open on Saturdays and 6 on Sundays. The services the companies on this page list most often on their websites are residential roofing (4), commercial roofing (3), roofing (3), siding (3) and insurance claims (2). 5 show a license on their websites and 4 have a BBB rating of A or A+. 15 have ten or more years of experience, the longest 46 years. 3 offer emergency call-outs; 9 offer financing or payment plans; 15 give free estimates; 9 are family- or locally-owned and 2 list coupons or special offers. 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.
How many of these companies publish a website?
Websites are listed for all 24 companies on this page. For wall work the site is worth opening, because photographs of finished houses in the same climate tell you more than any description. Look for jobs with the same material you are considering, and for pictures taken from close up rather than across the street.
Josh Brooks Construction and Renovation
“We will absolutely use them for future projects and would 100% recommend them to anyone looking to have great work done by great people all across the board.”
Columbine Roofing & Solar
“They communicated with us every step of the way and were flexible with scheduling to accommodate me needing to get my young kids out of the house on install day.”
Siding Design Pro & SDP Renovation
“She helped me with an issue from a different siding company, and I cannot thank her enough for her thoroughness, professionalism, and attention to detail.”
Rockies Roofing
“Because of the time of year we were under a winter storm warning 2 days after they started the work so Nick knew it needed to get done fast and they delivered!”
Red Canyon Roofing
“I had a few questions about my roof and the insurance process before making my decision, and the response I received was quick, informative, and friendly”
3model Construction
“While I didn't end up purchasing this home because of issues with the agreement made between the city and the urban development, I plan to use Adrian in the future!”
Quality Renovations & Roofing
“Brian Benner was great to work with and went above and beyond working with my insurance company, in addition to advising me that I needed more ventilation.”
B's Builders & Roofing
“The crew worked hard to complete a large building in the limited time frame that we had to work with.”
Rocky Mountain Improvement Roofing
“Not sure what more you could ask for, Michael met my insurance adjuster at the property, successfully advocated for a hail and wind claim and worked with the adjuster to include decking.”
County Roofing
“After the recent hail storm our insurance did not want to cover all of the damage but they got it approved and gave us a free upgrade to a class 4 roof.”
K&G Window Pros
“The sound difference alone is vastly noticeable but ive already noticed within a few hours of the windows being installed my furnace hasnt needed to kick on nearly at all to keep the house stable and warm.”
Boulder Roofing
“Jesse, the project manager, communicated with me throughout the entire process, advising me in the decision making when needed and including me in all aspects of the project.”
Rosner Roofing
“They made sure everything was done to our satisfaction, did an awesome job pointing out supplemental items that were not noted on the original claim by my insurance.”
Bluebird Windows & Doors
“From our consultation with Amy to the install with Chris and Ruben's team all communication has been professional and the team showed up on time and kept everything clean.”
Roof Source LLC
“The work was finished on time and Charles went out of his way to communicate with me through the process, which was important because they are all occupied by tenants.”
Black Roofing & Waterproofing
“Not only did the guys show up on time and complete the work in a timely manner; they covered all of our stuff in the garage and did a full cleanup when they left.”
Blue Spruce Construction Group
“They have gone the extra mile to make sure all of our customers are taken care of, especially our elderly and sometimes hard to get a hold of customers.”
New Windows For America
“I was referred to them by a neighbor and their quote came in thousands less than any other company for what appears to be very good quality windows and door.”
Why these companies made our list
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