(801) 572-8039
1520 N STATE STREET #101
LEHI, UTAH 84043
9:00 AM - 5:00 PM

Mountain States Windows & Siding

Energy Star Replacement Windows

Utah Energy Star Windows

As the window experts, we know windows are an investment, but they can save you money in the long-run. Getting Energy Star triple pane windows for your home is certainly the right way to go and the numbers are in your favor if you do—and not just when it comes to aesthetics. For example, the U-Factor, which is a measure of how quickly heat is lost through your windows, is 20-30% better for triple pane energy star windows than for double pane windows. An improvement that dramatic means a real difference in the level of heat loss you experience in your home and the amount you pay for your heating and utility bills. Who doesn’t love saving money?

The less heat getting into your house through your windows, the less you have to pay to cool your home back down. Solar Heat Gain, a measure of how much solar heat is transferred through your windows, is significantly decreased when you choose Energy Star triple pane windows. We offer several options based on how much heat and visible light you want to allow into your home. If you live in Taylorsville, South Jordan, American Fork, or the surrounding area, get in touch with us below.

our guarantee

Triple pane windows also enjoy significant gains in R-Value, which is a measure of how resistant a material is to heat flow through it. Double pane windows have r-values ranging between 3 and 3.7. Energy Star energy-efficient triple pane windows, on the other hand, can have r-values all the way to 5, meaning significant gains for you. You can save serious money on your energy bill thanks to our incredible windows. Energy Star windows offer more comfort in both summer and winter, and they provide you with considerably more energy savings in both the short and long run.


We can help you plan, design, and build your dream!


I had my windows installed about 18 months ago. The first winter that happened I started to get water coming through just a little. Later, I started getting full on leaking. I can never get anyone to call me back to address the issue. I don't feel at all that I got a good value.Update: I was contacted by the company, and they came out and resealed a lot of the windows. They were nice and attentive. I'm still not sure how great these windows are as I'm not a window person, but the company itself is very good.
Ray Mullings
Ray Mullings
19:35 18 Dec 20
Great price and product. Did a great job installing our six windows. I highly recommend Mountain States Windows & Siding! Thank you!!
Sherry White
Sherry White
22:36 13 Dec 20
Dave is amazing! Such a charismatic guy. He does great work and is personable. Would recommend this company to anyone looking for reasonable pricing and great service.
Cassie Arnold
Cassie Arnold
01:08 13 Oct 20
We are very pleased with our windows! Dave did a good job of sharing all of the information and what to expect. The install was quick and seamless and done in one day. Overall, we had a great experience and would recommend Dave’s friendly service to anyone.
Tomio _sugi
Tomio _sugi
21:15 03 Sep 20
I am completely impressed with Mountain States Windows and Siding. We needed to replace a very small section of vinyl siding on our house. Most companies weren't willing to help me find a match or sell me such a small amount. But Mountain States was so helpful! They were responsive, knowledgable, and generous. They really bent over backwards to help me get the couple pieces I needed (and quickly, too!). There really is no job too small for these guys! I highly recommend this professional, accommodating, honest company.
Rachelle Orsak
Rachelle Orsak
16:02 25 Aug 20