#1 Boulder Siding and Window Contractor

Bellwether was professional from the beginning to the completion of the job. When they said something was going to be done, if was done. The job turned out looking extraordinary and I was impressed at the attention to detail at the end of the job. I was a contractor for 40 years and I know how paying attention to details can make or break a successful project. New siding is expensive and if you're going to have it done, you want it done right and professionally, Bellwether did that.

I’m not easily blown away, but I am so far! From Ryan’s incredible customer service, to Rob’s transition into production, and today, Dylan with Angel’s crew getting me out of a jam! The roofing contractor (not Bellwether) needed the facia removed and blocked. With less than 12 hours notice Dylan mobilized Angels crew who knocked it out in a single day: Safely and Professionally! I could not be happier with my selection of Bellwether!

We were in dire need of a backdoor/storm door replacement and our large kitchen dining area window. Bellwether provided us with a professional consultation with all our questions answered and a reasonable price. The organization of the project provided us with professional services from the initial consult with Teri Tovar who understood exactly what we needed, to the Project manager, Dylan Hardin, who managed and delivered the project with personal attention to all the details and concerns along the way, to the installation crew who were amazing and left us with a beautiful window and doors that looked so good! We love the product, the on point service! It was a worthy investment all around! Thank you!

Tony and the team was amazing!

Could not recommend Bellwether enough! My home is currently for sale, and the James Hardie siding update they completed has been a total game changer. Not only does it look fantastic, but it has significantly improved the overall curb appeal and value of my home. From start to finish, every person I worked with was responsive, professional, and genuinely helpful. I especially appreciated the free consultation to discuss options, the 3D visualization tool that allowed me to see different siding styles and colors on my actual home, and their willingness to accommodate my accelerated timeline. The entire process was smooth, well-organized, and exceeded my expectations. The first photo shows the siding before the project, and the second shows the finished result. The quality of the James Hardie product combined with Bellwether's craftsmanship made a huge difference in the final result. I couldn't be happier with how it turned out and would absolutely recommend Bellwether to anyone considering a siding project.

Josh at Parker Days was great! Thank you for all the help.

highly recommend Bellwether and their team! They helped steer me to the best option for my home, and were so fast on the instal! thanks!

We love our windows. The whole process of working with Bellwether was such a pleasure. The staff was very helpful and responsive to all questions. They were timely with the install and the installers were so pleasent. They constantly were cleaning up the rooms and vacuming everywhere. We could not be more pleased with Bellwether.

Great company that is trustworthy and has an owner with a lot of integrity. Highly recommend!

Bellwether and their team of siding crew (Chuy’s team), project manager Dylan and office account’s person(Karen Fowler) were all great to work with on my Hardie plank siding replacement project. Everyone at Bellwether is invested in making sure the homeowner is satisfied with the end product. Water/moisture damage was found underneath the old siding which caused an additional 2 days of work tearing off and replacing with new OSB board. A large picture window was found to have a broken seal necessitating a new window order. Through this unanticipated process, Chuy and Dennis helped with navigating the changes and time frames. Each day Chuy’s crew cleaned up the yard and driveway. They were consistently pleasant and courteous. I am very pleased with how the new siding looks and am anticipating that it will last a long time.

We had James Hardie Siding installed on our house and the end result is so nice. Bellwether is a polished and professional company. The communication from.beginnimg to end was clear and excellent, and the crew worked so hard while they were here. I would absolutely recommend Bellwether to anyone who needs their siding replaced and wants to be really confident it's being handled by a company that knows what they are doing. And will do it right the first time.

Great to work with and solid business model to be sure you are satisfied with the work. Refer a friend!

Installing and setup was quick and awesome.

We had siding installed. From the initial product overview and through completion, including cleanup, Bellwether & its crew did incredibly well in communications & professionalism. Were extremely pleased with the outcome & appearance.

Very happy with our windows and door.

We have worked with Bellwether on two projects now and have been delighted with every aspect of the process each time. From initial contact to Project completion they routinely hit all of the marks and certainly earn their 5 Star rating. Our 2023 project with them replaced our poorly maintained Cedar Plank siding with James Hardie siding. In 2026, we used them for Siding and Soffit/Facia to complete the exterior of our house. Communication from the team is always amazing, and I have to rave about Angel's team. They are amazing, thorough and efficient, and I love seeing how well they all work together. We will be repeat customers for any projects in the future and are looking forward to having them replace our decking.

Professional and on time they did great.

Bellwether is a great company. The communication was great., there was not any pressure to make our decision. We would highly recommend them to do your home. We know that our siding is going to last a very long time.

Excellent products, professional and knowledgeable staff, competent crews, fair pricing.

WOW - My husband and I are SO thrilled with our Hardyboard Siding that Bellweather installed. Our project manager and the crew were very professional, showed up on time, and provided us with excellent craftmanship. We would highly recommend Bellweather to all Colorado Residents.

Would work with them again. Rick Lamutt is a true professional. Cody and team were very easy to work with.

I had the opportunity to work with Bellwether in the Summer & Fall of 2025. (It is my very own fault that my review is nearly five hundred twenty five thousand six hundred minutes late in posting!) Nick rolled up to my house on a hot June day for our initial meeting. Prior to this meeting, I had met with two other companies (who will remain nameless) who had presented me with good, better, best options for a siding project so I had some general figures in mind. I was not entirely sure this was a project I could even take on, if I was being honest, and I told Nick that, and he held space for it. One thing that is really notable about Bellwether is that they only offer the best option, and because it is the best option, it's a product that everyone who works for them backs and supports and THAT is something I get down with. Anyway, Nick and I sat in that hot summer sun for nearly five hours (yes, you read that correctly) sometimes in silence, analyzing every option on this green Earth. You see, I have a very long house and I wasn't yet sure if I wanted to replace the siding on the whole thing or maybe do half of it. Did I need new windows? I knew at least three...but then are all the rest going to look old and crusty next to the new ones? Probably. How about new soffit from where the squirrels chewed through? There was a lot to discuss and Nick was there through it all. At one point we even took a couple calls with Josh & Tanisha who were available to answer questions on the spot as well. At no point did I feel pressure in this process, but it is important to me to convey how much belief this company (and now me) have in this product and the craftpeopleship behind it. Moving into production, I was deeply appreciative of how flexible the team was with working around both my work schedule and the already existing schedule of the tenants in my rental, which is the south end of my home. I was trying to accomplish this project while not disturbing or uprooting them, which was an added challenge that Bellwether had to navigate throughout the process. Dennis and Dylan were communicative with the ordering, delivery, and installation process, as well as when issues arose (as they do in any construction process) they were quick to problem-solve with me on the phone when I couldn't physically be on site. The James Hardie siding is such a CLEAN look. Pair that with the framing of the windows and edges of your house and all that matching the soffit, facia, and gutters--I mean, chef's kiss! The caulking also all matches the color of what is being caulked. It's the details for me! I loved how the entire crew wore Bellwether swag while working each and every day! The team was very thorough with clean up each day of construction as well. My project involved 17 windows total, five of which weren't included in the initial order and delivery, and Bellwether was quick to remedy this and took accountability for the misstep. Due to my next tenant, those windows had a later install date, and the crew came to replace all the framing again after the new windows were put in, after having already done this once. I had expected the previous new framing to be reused and was glad to see and know it was all replaced and brand new! Bellwether's honesty, reliability, and integrity throughout my experience is what makes them stand out in this industry and why I would recommend them to anyone seeking the same service. I want to also acknowledge Luis who put many final touches on my windows in the Fall, which really made them pop. His dedication to making it right and finishing the job out is much appreciated! And a S/O to Mason who swung by to check out the work, get to know me, and spread some positive Bellwether vibes. So many neighbors have told me they have NEVER noticed my very cute 91-year-old house before this facelift, but look-at-her-now-look-at-her-now-she's-gettin'-paper(cuter). Thanks s'much Bellwether!! Up next--doors! I need em, you got em! I'll hit ya up!