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Lehi, UT

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Mountain States Windows & Siding

4.0 (5 reviews)
Open • 9:00 am - 5:00 pm
Updated 2 months ago

Services - Mountain States Windows & Siding

Siding installation

Siding repair

Siding replacement

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HomeStar Windows & Doors - A kitchen with newly installed windows and sliding glass doors.

HomeStar Windows & Doors

(15 reviews)

Update: As soon as Dave heard about the holes, he sent someone out the next morning to repair them…read more I appreciate that they worked so hard to make our experience perfect. If I could throw another star their way, I would. But Yelp limits me to five. There's something magical about sitting by an open window, feeling the gentle breeze. I have not been able to experience that in the past few years, as the windows in my house have been broken and unable to open. So I finally bit the bullet and reached out to HomeStar Windows and Doors to get a bid to replace them. Dave came out to measure and gave me a bid promptly. He did not put on the pressure, but gave me options-"good, better, best" and thoroughly explained the difference. We decided to go through with the replacement and got on the schedule. We also decided to replace the blinds with shutters and asked to coordinate the installation to happen around the same time. Well, the windows were ready to be installed sooner than we anticipated, and Dave offered to cover the cost of having the old blinds taken down and reinstalled so we could go ahead with the window installation before the shutters. It also landed on a day that we would be out of town, so they offered to text me when they arrived and then again when they left for the day. It was nice to get those updates so I was aware of when people would be in my house. When we returned home, the new windows were in and all the old ones were taken away. It made my life easy! All I needed to do was put furniture back that I had moved for them. There were also some holes in walls that I'll need to patch that looked like had been made when the windows were removed. And now, I sit by an open window (that I was able to open with one finger rather than the gargantuan effort it used to take) and enjoy the nice breeze. I shouldn't have waited so long.

I used this business 5 years ago for 17 windows and I had a great experience. Their estimates are…read morevery detailed and are emailed over right away. The communication with them was also great. I just got 2 more windows and one sliding glass door replaced last week and they once again delivered great service and product! I can't recommend them enough!

Performance Windows - Ready for energy efficiency while also beautifying your home? Look at this recent Performance Windows project!

Performance Windows

(20 reviews)

Well, I'm not used to door to door salesmen, so I'm naive to their gimmicks. Here's what I've…read moregathered. First, the salespeople I spoke with were all very nice. Essentially, they said they were coming to the neighborhood to offer a special deal for just a couple of houses, to update their windows as "model homes" where they give you a bangin' deal in exchange for some advertising (have a sign in the yard for 60 days, write a positive review, allow before/after photos, and share the amount of energy savings after a year of having the new windows). They would cover labor costs, installation, and discount the windows themselves 30%. The first guy took down my number because I said I wanted my husband home before they started taking measurements to give me a quote, and he called later saying the two slots had been filled. The next day or a couple of days later, another guy came to the door saying behold! We opened another spot! So we made an evening appt for another sales person to come and do the measurements. She came, explained their windows, the deal, the lifetime warranty, etc and I have to say, she was very kind and accommodating when it came to our 1.5 year old son and newborn who were vying for attention. But she opened with "I'll need a hard yes or a hard no by the end of this conversation, and my husband hates pressure tactics, so he was already skeptical. Long story short, their "super discounted price" was $45,000. Full price was nearly $92k. I don't think windows should be ~20% the value of our house, sorry. Anyway - we ended up giving a hard no, and I read online that this company gives the same spiel to everyone. There is no model home. I'm guessing their five star reviews are part of the "discounted" exchange. I'm glad my husband is not as easily duped as I! When the time comes for new windows, we will look elsewhere.

Frustrating experience with incomplete repairs, poor communication, licensing issues, and…read moreundisclosed installation methods. I hired Performance Windows for a full window replacement at my home in Reno. They offered free labor because the home was supposed to be used as a display/advertising house. We financed the project through a third-party lender. From the beginning, there were problems: * The itemized invoice lacked a clear breakdown of materials versus labor. * When I requested the contractor's license, they gave me a Nevada license number belonging to a different company (Sky View Windows and Doors) that was suspended at the time for a DIR violation. They also provided an expired Utah license for the lead installer. After repeated requests and verification through the Nevada State Contractors Board, the Sky View license was eventually reinstated, but the lack of transparency was concerning. * Performance Windows operates mainly as a sales company and uses Sky View as the installation crew. This was not clearly explained upfront. * They did not disclose that they would overlay the new windows onto the old existing surrounding wood frames. When the old windows were removed, this loosened those wooden frames from the wall and created gaps. Those gaps later caused leaks. After installation, multiple repairs were needed: * A sliding door screen needed replacement (this was eventually completed). * A dining room window started leaking after heavy rain. The crew sealed the original wood panel that had been ripped out during the initial install. The sealant had to dry before testing, so I still don't know if the leak is truly fixed. * Bathroom and laundry room windows were supposed to get proper frame replacements. Instead, the installer only cut plastic pieces, which exposed holes. The smaller bathroom windows still do not open fully -- they claim this is "part of their design." * There was also a gap in the flooring caused by the smaller slider door installation. Beyond the repairs, the overall performance of the new windows has been disappointing: * Even though the windows may look better, our house is noticeably hotter than it was with the old windows. * We are now getting bugs coming into the house. Communication and scheduling were consistently poor: * Appointments were missed or delayed. * On one visit, the installer arrived late, a different crew showed up first with no knowledge of the other repairs, and the main installer forgot several items and had to leave mid-visit to buy supplies at Home Depot. * The crew often seemed rushed to finish and leave. While the sliding door screen was eventually replaced, the overall handling of the project has been disappointing. Multiple issues remain unresolved or only partially addressed. The combination of incomplete work, undisclosed installation methods, performance problems, and lack of professionalism made this a stressful experience. I would not recommend Performance Windows. If you're considering them, verify their contractor licensing status independently through the Nevada State Contractors Board, ask detailed questions about their installation method (especially whether they overlay onto existing frames), and get everything in writing before signing.

Glass Doctor of Utah County

Glass Doctor of Utah County

(19 reviews)

I am passing through Salt Lake city on business delivering a vehicle as part of my Fleet company…read moreneeding windshield repair minor cracks I scheduled a appointment at 9:30 AM upon coming in a older gentleman met me in the parking lot telling me where to and where to not park but very rudely when I entered the building I was told by the employee Elisha she would take care of it and I heard nothing else of the sort great interaction with customers I appreciate the time taken to make me feel comfortable and welcomed in the establishment. I was later Told the old man was the owner of the property. Please ignore him. I will not blame the company for a property owners faults there are clearly no signs showing exactly where to park along the fence line so I was a little confused but the customer service at Glass Doctor is just great if I have any drivers passing through that need windshield repair I will definitely recommend this place a neighborly company it truly is disregard any other outside entities upon service.

I was 517 miles from home and my 9x30 window for my Knapheide top along with the seals were…read moremissing. Called my glass guy in California and he said that it was a special fix and that I would have to get the parts from Knapheide and he would install it for $75. So I called Knapheide. They wanted $129.99 for the 9x30 window, outer seal was $11.99 per foot, inner seal $9.99 per foot with a minimum 8 feet each must be purchased. So I was looking at $380.83 without shipping and taxes. I was still far away from home so I decided to give Glass Doctor of Utah County a shot. They were able to fix everything for $239.40 before taxes saving me at least $140. They were super professional and friendly and the person that did my window had over 30 years of experience.

Mountain States Windows & Siding - windowsinstallation - Updated November 2026

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