Denver, CO

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About this pro

How does your business stand out?

Our service and the quality of our install are what make the difference, we pride ourselves on superior installers, our window installers are finish carpenters by trade and my main siding installer is an "artist". They are both capable of impressive work with details that make the difference. We manage to do this while offering competitive pricing by keeping overhead low.

What do you enjoy about the work you do?

Simple, I love working with people as well as problem solving!


Denver, CO 80227


Background check


Years in business


Number of employees


Times hired on Thumbtack



16 Reviews
  • Kris C. Sep 18, 2017
    I was very happy with this company. They were always on time, friendly and efficient. All of the workers were very gracious and strove to make me happy. I would definitely recommend them.
  • Paula G. May 14, 2017
    Window Installation
    Verified Review
    I had all 3 of my windows replaced. I had Greg of HRTI give me an estimate in November and he maintained the same costs in March. That was a great start. An installer was at my house within the week to measure & order the windows. Today the windows were installed by Chad who was very knowledgeably & professional. He did a great job & showed me all the features. I would definitely recommend this company & the quality product they represent. Thank you Paula Garmatz
  • Tim H. Mar 21, 2017
    Window Installation
    Verified Review
    HRTI dos an unbelievable job!
    Our windows and stucco experienced some major hale damage a few years ago. I knew it was going to be a huge job when the insurance adjuster had to refer to a special adjuster to assess the damage. As a result, I looked long and hard for the right company for the job. As soon as I met Greg at HRTI, my search was over. I was sold! I even told my insurance company, "HRTI is the only company I will work with on this job." Not only was Greg professional and confident that he could do the job, he assured me that he would take care of all the negotiating / communicating with the insurance company. Our experience was great. Greg and his staff were in constant communication letting us know when workers would be at our house, their progress, and why they were doing what they were doing. We never ran into any issues, but if there were surprises, HRTI was always on top of it. There customer service was impeccable! In the future, I will never use anyone other than HRTI for my windows, stucco, or roof. In fact, due to mother nature, I had to file another claim for window and stucco damage again. That was unfortunate for us but no big deal...HRTI was there. In fact, they already completed the job for a second time. I highly recommend HRTI. You won't be disappointed!
  • Alex T. Feb 4, 2017
    Window Installation
    Verified Review
    I would hire them again!
    I spoke with Greg initially and had a good experience talking with him. He was very professional, curious and strait forward. He didn't try to oversell me something that I didn't need and was honest about pricing. Chad installed my windows and security door. He worked very hard and payed attention to detail. He also cleaned up and left the job site looking the way he left it. There was always good communication and good customer service. I highly recommend hiring HRTI.
  • Cheryl M. Dec 4, 2016
    Siding Installation, Repair, or Removal
    Verified Review
    Great work, good price!
    Worked with Greg on an incredibly tight timeline with some special requests for the job. He was the most professional of all the contractors. Manuel and Carlos did fantastic work! Bonnie also was superb in keeping us appraised of the progress. We never once had to chase anyone down or play the games you so often do with contractors. Would absolutely use them again and highly recommend them!
  • James D. Nov 16, 2016
    Window Installation
    Verified Review
    Windows and Door - HRTI
    We contracted with HRTI to replace 10 windows and a door. We had received bids from two other companies prior to meeting with Greg. The entire process from receiving the bid with Greg to final installation with Chad was professional and we are very pleased with the results.
  • Jeff L. Oct 31, 2016
    Vinyl Siding
    Verified Review
    HRTI siding review - LP SmartSide
    Thoroughly please with Greg at HRTI. He consulted us throughout the process and we are pleased we ended up with the LP SmartSide product. Great warranty and a great product. HRTI is the real deal when it comes to knowledgeable informaiton about the product choices and installation options.
  • Andy M. Aug 17, 2016
    HRTI handled our entire hail storm claim. They were able to complete and coordinate our roof, siding, paint, shutters and even went to bat for us with the insurance company to get adjustments in our favor. Greg and the entire team at HRTI were an outstanding company to align with for this scale of project.
    Greg C. Aug 26, 2016

    Andy, you and your family made the process easy! Thank you and congrats on your sons 16th B-Day!

  • Melissa K. Aug 14, 2016
    Window Installation
    Verified Review
    Greg C. Aug 15, 2016


  • Dustin P. Jun 12, 2016
    Siding Installation, Repair, or Removal
    Verified Review
    I didn't end up hiring HRTI, my experience was ok, the salesman called a week later not even remembering he already gave me a quote 2 weeks prior. Gave us estimates on roofing , windows and siding. Roofing price was competitive but found a different co. that was better on pricing etc.., now as far as the windows, they were around $8000 more than 2 other company's. Granted they did quote Simonton windows,but they did not being the window they were quoting for. They brought the more expensive model for demo. As far as siding goes, when we first talked to the salesman, I did state that we wanted Hardie board siding, when he came back with the quote it was for vinyl so it either got lost in the conversation ir he was not paying attention. Anyways, did not feel pressured by them, just shopped around for pricing which was $8000 more beneficial to us for windows, not counting HRTI out on siding yet, still getting prices. Thanks!
    Greg C. Jul 18, 2016

    Dustin, I have tried to personally call you twice without response, we are so glad to hear you did not feel pressured. I am disappointed we lost the window business and roofing business to another contractor, but have a very hard time believing we were $8000 higher, but will take your word for it. We pride ourselves on offering the highest quality products as well as the highest quality of install. We offer Vinyl as well as Hardie, LP and more. As the owner of HRTI I would appreciate the opportunity to speak with you and thank you again for the opportunity to earn your business! Greg

  • Leah K. Jun 8, 2016
    Window Installation
    Verified Review
    Last year, upon purchasing a new house, we found that many of the windows were in bad shape. They were old, warped, and leaking. Being a first-time homeowner, I blundered around until I found Thumbtack, and HRTI offered to help almost immediately. The service I received from HRTI in purchasing new windows and having them installed was quick, professionally done, and reasonably priced to the point that, when we decided to get the rest of the bad windows replaced this year, there wasn't even a question of with whom we'd be working. Our experience with HRTI the second time was just as good as the first, and we are thrilled with the quality of the service. I could not recommend HRTI more highly.
    Greg C. Jul 18, 2016

    Leah, Thank you! We really appreciate your business and can't thank you enough for the review! Greg

  • Jay V. Oct 30, 2015
    My roof and windows from HRTI looks great. Installers and salesman are great, kind and courteous. Lance and chad are phenomenal.
    Greg C. Jul 18, 2016

    HRTI appreciates you and your business! Please don't forget that we pay$200 for referrals!!! Greg

  • Thom D. Oct 24, 2015
    HRTI was very easy to work with during a difficult time. Our house was severely damaged during a hail storm. Greg and HRTI had a new roof and replaced windows within a few months. They made dealing with the insurance company very easy. I liked that HRTI uses year-round labor and not a company that comes in after a storm and uses temporary help. I cannot recommend them highly enough. Indeed, some of our neighbors using other companies took a *year* to get their house fixed after the storm.
    Greg C. Jul 18, 2016

    Thanks Thom!!!

  • Del B. Oct 22, 2015
    We challenged HRTI with a new residential siding material and installation. Weathering steel panels (A606) were fabricated to our specifications and installed over our existing siding in a unique manner, allowing airflow behind the panels to control heat buildup and moisture. HRTI was up to the challenge, improving the installation and panel interfaces. Although HRTI was familiar with standard steel installations this project was new to them. The crew was conscientious and quality minded. Greg Cotton communicated well with his customer. Feedback for improvement: HRTI to acquire the capability to software model a home with exterior material choices and alternative designs.
    Greg C. Jul 18, 2016

    Del, Thank you again for allowing us to come back and shoot pictures of your project! Your home is one of my favorites! Anything we can do to earn that last star? Greg

  • Tom R. Oct 22, 2015
    We used HRTI for both a new roof and new siding. We were totally satisfied with both. Quality materials professional polite and extremely competent workers ... Greg delivered on all of his promises, no surprises! We would use them again in a heartbeat and can recommend them without qualification.
  • Ben W. Oct 21, 2015
    Replace hail damaged roof. Greg was great during the sales cycle and helping to get the insurance company comfortable with the damage. Crew doing the work was good, but there was a little damage to the siding of the house. To Greg's credit he took care of it.
    Greg C. Jul 18, 2016

    Ben, Thanks again for your review! I really appreciate it! Is there anything that we can do to earn that last star? I am so glad we got everything taken care of to your satisfaction! Greg


What education and/or training do you have that relates to your work?
I am a general contractor, Lead certified, a Certainteed Master Shingle Applicator, Hardie and LP Preferred Installer, Pella Preferred Installer, Simonton Master Installer, BBB A+ rated for 15 years straight, Houzz Contractor of the Year etc...