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Bellwether Windows, Siding, & Doors

Windows and doors Company in Denver, Colorado.

Bellwether Windows, Siding, & Doors is a window company based in Denver, CO. Its listed services include window replacement and entry door installation. Its Pella Platinum Certified Contractor is reported by the company and not yet verified, so check it with Pella before work starts.

4.8on Google · 304 reviews
  • TenBestFind Reviewed
  • Top 10 Winner
  • iWhat do these badges mean?
    TenBestFind Reviewed
    Our editorial team has researched and reviewed this business.
    Verified Business
    Key business information or ownership has been verified against a primary source.
    Top 10 Winner
    The company currently appears in at least one active TenBestFind Top 10 ranking.
    Featured Partner
    A paid commercial relationship with TenBestFind. It never earns or influences a ranking position. This company holds no such relationship.

    Advertising & Sponsorship Disclosure

Quick Overview

iHow this is made

This summary is generated from the verified data on this profile: services, service area, credentials, warranty terms and the company's Google review record. It is reviewed by an editor before publishing and refreshed whenever the underlying data changes. Nothing here is asserted that is not stated elsewhere on this page.

Editorial Standards

Bellwether Windows, Siding, & Doors is an owner-run exterior remodeler on Newport Street in northeast Denver, led by co-founders Josh and Tanisha Dembicki. It replaces windows and doors and installs siding, and its site says it is a Pella Platinum Certified Contractor and a James Hardie President's Club winner. The company offers 3D renderings of a home's exterior, a handoff meeting between sales and production, and a pre-install walkthrough. The site shows a Better Business Bureau A+ rating, an SBA badge and chamber of commerce memberships. Google shows 4.8 stars from 304 reviews, read November 3, 2026. It suits homeowners who want windows and siding done together, and suits less well anyone who needs weekend appointments.

  • Best for windows and siding replaced together by one crew
  • Pella Platinum Certified Contractor and James Hardie President's Club winner, per the site
  • Siding is a large part of the business, so ask for window-specific terms

Company Facts

Bellwether Windows, Siding, & Doors at a Glance

By the numbers

Google rating
4.8out of 5
Customer reviews
304on Google

Rating and review count pulled from Google on November 3, 2026.

The work

Best for
Windows and siding replaced together by one crew
Primary service
Windows and doors

Where

Headquarters
Denver, CO
Service area
Denver
Emergency service
Not advertised

Money and guarantees

Free estimates
Yes
Financing
Available

Credentials

Pella Platinum Certified Contractor
Pella Platinum Certified Contractor (reported by the company, not verified)

Editorial Review

Our Take on Bellwether Windows, Siding, & Doors

A younger, owner-run exterior firm with Pella Platinum and James Hardie credentials and a design-led process. Siding is a large part of the business, so ask for window-specific terms.

Best forWindows and siding replaced together by one crew

What We Like

  • Pella Platinum Certified Contractor and James Hardie President's Club winner, per the site
  • 3D and HD exterior renderings offered before work starts
  • Sales-to-production handoff meeting and pre-install walkthrough
  • Owner-led by co-founders Josh and Tanisha Dembicki
  • Financing page and Better Business Bureau A+ rating shown on the site

Things to Consider

  • Siding is a large part of the business, so ask for window-specific terms
  • Younger company than most on this list, about five years by its own account
  • Closed on weekends

Customer Ratings

Google Reviews for Bellwether Windows, Siding, & Doors

Customer ratings shown here come from Google. They are separate from our editorial review above.

Google rating

4.8

Based on 304 Google reviews

Review data updated November 3, 2026

View on Google Maps

Rating Distribution

  • 5 stars93%
  • 4 stars3%
  • 2 stars2%
  • 1 star3%
iAbout this distribution

The distribution reflects the 304 Google reviews available when this profile's review data was last refreshed on November 3, 2026. Ratings and counts change continuously on Google, so figures here may lag the live profile slightly. We publish only the values returned by the source, never estimates for missing bands.

Editorial Standards

Recent Google Reviews

  • Mike L5.0

    ​Bellwether did a phenomenal job replacing our old wood siding with James Hardie fiber cement boards and matching our trim color perfectly. The crew was efficient, highly professional, and finished the work faster than expected without cutting any corners. The final product looks amazing and gives us complete peace of mind. I wouldn’t hesitate to use them again or recommend them to neighbors!

    November 2026Google
  • Brook Montoya5.0

    I had them roof my house. The whole process was very smooth and fast. They did a great job and everybody was really friendly. I would recommend them to my family and friends.

    October 2026Google
  • Chuck Grindel5.0

    They did a great replacing the siding on our house

    October 2026Google
  • Richard Denney2.0

    The project manager Ezekiel was great and deserves five stars for his attention and dedication to the project and getting it completed to the customers satisfaction. Unfortunately he inherited a window and Siding replacement Project that was initially delayed apparently due to staffing Issues. The home office Did not communicate well with me after I signed the contract and made down payment.They Did not apply for a building permit prior to sending a crew. This caused a delay in project start. Apparently the Person they sent initially did not do accurate field measurements, therefore materials were delivered to the site in the wrong quantities and sizes delaying the project again. Some materials were delivered damaged causing additional delays. The Initial wainscoting Installation was installed with corners and damaged / scratched materials and needed replacement by a professional sheet metal crew. This caused another delay. The project took six months from the time I made down payment and final punch list completion. Initially, I was told the Project Would take 8 to 10 days from the time it started.Ultimately, the project looks great. I highly recommend the project manager bur was not impressed by the rest of the staffing at Bellweather.

    October 2026Google
  • Robert Hoolsema4.0

    The installation went well and was completed in one day. The finished product looks good. It was expensive. I hope it is a good long term investment in our condo.

    October 2026Google
  • Dan Baginski2.0

    The initial consultation went well. Communication up to the point where the installation occurred went well. We did siding and windows. The installers did a good job, but didn't finish the job before they left. It took 9 weeks and a lot of un-returned phone calls from production to get somebody else out to finish the job. Twice they were supposed to show up and canceled at the last minute. Lots of odds and ends were missed. Some of the seams were not caulked. The hose spigot was never trimmed out. The pipe for the radon system was never reattached to the house. They were supposed to tear out the old soffits but they covered over them instead. I had gaps in the miters of my interior window trim big enough you could fit a nickel in them. I could have installed tighter joints myself.<br><br>The window crew came back out to finish and said "they just caulk those joints". Well that's what an amateur does. I ended up having to finish and finesse it myself with some wood filler to make it look good before final paint.<br><br>When they finally came back to finish the job, they obviously didn't bring the correct caulk. They used tan around a brown trim piece on the hose spigot. Only attached half the radon pipe back to the house. And they didn't caulk the remaining seams in the trim. Stating "Those don't get caulked". That's interesting because the original installation crew caulked all those joints. I guess I'll finish that myself too.<br><br>I've been back and forth with their production team trying to get paperwork to turn into my homeowners insurance since we live in a wildfire area. They're useless. I've had numerous un-returned phone calls and emails. The installation crew worked hard but must have been pulled away to another job before finishing. The issue seems to be with the management of the company itself. At the end of the day I wish we had gone with someone else. For the amount of money a project like this costs, I would expect a lot better. If your mechanic gave you your car back with a box full of nuts and bolts that were uninstalled, would you consider that acceptable?

    October 2026Google

View more Google reviews

Ranked#5of 8 windows & doors in Denver, COre-checked November 2026

Editorial Ranking

Why Bellwether Windows, Siding, & Doors Made Our Top 8

It holds position 5 in 8 Best Windows and Doors Companies in Denver, CO (2026).

See the Full Denver RankingPositions cannot be bought

What They Do

Services Offered

Works in Windows and doors and Siding.

Areas Served

Based in Denver, CO.

iAbout service coverage

Coverage is as the business describes it, cross-checked against where its recent documented work is. A company will often travel beyond the areas listed here for a large job and decline a small one at the same distance, so confirm your address before scheduling.

Editorial Standards

Company Background

About Bellwether Windows, Siding, & Doors

Bellwether Windows, Siding, & Doors is an exterior remodeler based on Newport Street in northeast Denver. It is owned and led by co-founders Josh and Tanisha Dembicki, and the site lists a team that includes a sales manager, project guides, a project manager and a scheduling coordinator. The company says it became an industry leader in its market in just five years, so it is younger than most firms on this list.

The service mix is windows, doors and siding, and the site argues that the two belong together because the integrity of siding and windows is connected. Bellwether says it is a Pella Platinum Certified Contractor and a James Hardie President's Club winner, and its site shows a Better Business Bureau A+ rating, a multi-year Guildmaster Award, an SBA badge and chamber of commerce memberships in Evergreen, Conifer and Fort Collins. Those are the company's own claims and are worth confirming with the issuers.

Siding is the strongest line. The site calls Bellwether the number one James Hardie siding contractor in Colorado and number two in the nation by volume, which is the company's own claim, and describes it as a James Hardie Elite Preferred contractor. Its Denver pages cover fiber cement, vinyl, cedar, composite wood, board and batten, lap and shingle profiles, and it publishes photographed Hardie color combinations from Denver and nearby towns. The 30-year product warranty and 15-year finish warranty it describes relate to its siding products.

The process includes personalized exterior design with 3D and HD renderings, a handoff meeting between sales and production, and a pre-install walkthrough. The site lists a financing page, so ask which warranty applies to windows and doors.

Google shows 4.8 stars from 304 reviews, read November 3, 2026. Office hours are Monday to Friday, 9 AM to 5 PM.

Bellwether suits homeowners who want siding, windows and doors replaced as one project with a single schedule, and who like visual design tools. It suits people less well who need only one window fixed, who want a weekend appointment, or who want a company with decades of history. Before booking, ask for a written quote that separates siding, windows and doors, ask which siding profile and finish are quoted, and ask for the labor warranty on paper. Colorado has no state licence for siding or window installers, so licensing is handled by cities. Ask whether the company is registered with the City and County of Denver and carries liability insurance.

iWhere this information comes from

Company history, ownership and capability details on this page are provided by the business and reviewed by our editors for plausibility and consistency. They are not the same as the credentials block, where each item carries its own verification status and source.

Editorial Standards

Credentials

  • Pella Platinum Certified ContractorPellaReported
  • James Hardie President's ClubJames HardieReported
  • Better Business Bureau A+ ratingBetter Business BureauReported
iWhat verified means here

Verified means we checked the credential against the authority that issues it and recorded the date. Reported means the business told us and we could not independently confirm it. We publish both, labelled, rather than dropping what we could not check.

Editorial Standards

Other Sources

Reputation by Source

We show each source separately rather than blending them into a single score, because they measure different things.

  • Google

    4.8/ 5

    304 customer reviews

  • TenBestFind

    Editorially reviewed

    Ranked #5 in Denver windows & doors, November 2026

Pricing

Company Pricing & Estimates

What this company publishes about its own pricing.

Free estimates
Yes
Financing
Available

Gallery

Project Photos

Business-submitted, reviewed by our editors

  • Bellwether Windows, Siding, & DoorsBellwether Windows, Siding, & Doors
  • Bellwether Windows, Siding, & DoorsBellwether Windows, Siding, & Doors
  • Bellwether Windows, Siding, & DoorsBellwether Windows, Siding, & Doors
  • Bellwether Windows, Siding, & DoorsBellwether Windows, Siding, & Doors
  • Bellwether Windows, Siding, & DoorsBellwether Windows, Siding, & Doors

Compare

Similar Windows & Doors in Denver

Bellwether Windows, Siding, & Doors FAQs

  • What credentials does Bellwether Windows, Siding, & Doors hold?

    Its website says it is a Pella Platinum Certified Contractor and a James Hardie President's Club winner, and it shows a Better Business Bureau A+ rating. Colorado has no state licence for window installers, so also ask whether it is registered with the City and County of Denver and request proof of insurance.

  • What are Bellwether's hours?

    Google lists Monday to Friday, 9 AM to 5 PM, with weekends closed. The company does not advertise emergency service. Its office is at 3839 Newport Street in Denver.

  • Does Bellwether offer financing and a warranty?

    Its website lists a financing page and describes a 30-year product warranty and a 15-year finish warranty, which appear tied to its siding products. Ask which warranty covers windows and doors and get the labor warranty in writing.

  • Is Bellwether Windows, Siding, & Doors licensed and insured?

    We checked 0 of 3 credentials against the issuing authority. Verified items carry the date we checked; reported items are what the business told us and we could not independently confirm.

  • What areas does Bellwether Windows, Siding, & Doors serve?

    Denver. Coverage is as the business describes it, cross-checked against where its recent documented work is. Confirm your address before scheduling, particularly at the edge of a service area.

  • Does Bellwether Windows, Siding, & Doors offer emergency service?

    Emergency availability is not listed for this company. If you need an urgent call-out, check the ranking for companies that do list it.

  • What warranty do they offer?

    Warranty terms are not on file. Ask for them in writing before work starts.

  • How was this profile built?

    Credentials come from issuing authorities, ratings from the company's Google Business Profile with the date we read them, and the editorial take from our own review of estimates, warranty documents and public feedback. Anything the business told us is labelled as reported.

  • Can a business pay to improve its profile?

    A business can subscribe to manage its own listing details, and it can buy a labelled sponsored placement. Neither changes a ranking position or the editorial assessment on this page.

Is Something Incorrect?

Business information changes. Tell us about an address, phone, website, service area, credential or ownership change, or let us know if this company has closed.

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How We Rank

About This Business Profile

Last reviewed
November 2026
Profile last updated
November 11, 2026
Google review data updated
November 3, 2026
Sources checked
Issuing authorities, Google Business Profile, Company website
Could not verify
Pella Platinum Certified Contractor (reported only), insurance, founding year
Sponsorship status
No commercial relationship
Bellwether Windows, Siding, & Doors4.8 on Google · Denver, COVisit Website