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Clear Window Technology Dennis McHugh and his team at Clear Window Technology has been replacing, repairing and installing windows and patio doors in St. Louis since 1983. You can be assured that our team of experienced technicians have the tools and expertise needed to complete any size job. When you call us, you won't get three hours sales pitches or phony discounts. Our free, one hour, in-home consultation, will provide you with a solution at competitive prices.

Our success is measured in your satisfaction. Our long-term relationship with our suppliers and installers assures you of durable products, professionally installation at a reasonable prices.
Services
As a full-service window company, we handle everything from consultation and design all the way to the full installation of your windows - and beyond! We believe that window services in St. Louis should give customers continuous peace of mind long past the date of the installer's visit. As a small business, we are able to give you and your home the very best and personal attention with every project. In the unlikely event there is an issue with your windows down the road - we'll be there in no time to repair or replace your windows.
Clear Window Technology Inc. has been installing windows into the homes of St. Louis for almost 40 years. Our products are high quality, as is the integrity of our installation. We know you're looking for the most competitive price for replacement windows, which is why we offer options to fit any budget.
Picture this: a room where you can breathe in the fresh outdoor air while sipping your morning coffee. Well, if you can picture it, the technicians at Clear Window Technology Inc. can make it a reality! The Clear Window Technology difference is all in the installation. When you hire our home window installation team, we will take care of everything so that you can have a home that is the envy of your neighbors!
A challenge many homeowners face is whether they should replace a broken window or have it simply repaired. In some cases, a repair might be all it takes to keep the window you already own safe and operational for a fraction of the price of replacement. We service all types and brands of windows and can usually get the parts or glass you need to keep them not only operational but looking good for years to come. Clear Window Technology Inc. is a local, family owned-and-operated business with close to 40 years of experience.
Reviews (17)
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Chris C.
Jun 04, 2022
I can not say enough about this company and the owners. We had windows and a sliding door installed a year ago. I had an issue with one of the windows (which, as it turned out, was my fault!) and the response was lightening speed. Dennis was literally at my house within a hour, showed me how to fix the problem should it happen again. Now that right there is incredible customer service. I am equally as impressed with his wife, as I was in May 2021 when our windows were installed. What a breath of fresh air! Many thanks, Dennis and Tracey!
Dana Akers
Apr 23, 2022
We purchased a custom front door and storm door that cost a little less than $9,000. We were not made aware, that storm doors can cause front doors to melt (we obviously would not have gotten a storm door if we knew this). We were promised solutions to fix this problem such as an after-market vent insert on our storm door, new trim to replace the damaged trim and new mull cover. Which never happened. I am incredibly disappointed with the service and the product and meanwhile we are stuck with a melted front door.
Mike Horstmeyer
Dec 10, 2021
Replaced 7 windows and 1 sliding door in newly purchased home. I had received quotes from multiple companies and Dennis' quote was competitive on price and had the best lead time. He was friendly and extremely responsive via phone and email. Windows and door arrived at the quoted lead time and were installed in just a few days. There was one issue with the glass in two of the windows (mix up on which was fogged and which was clear), which Dennis promptly addressed and had the glass replaced two weeks later. Overall, we love our new windows and the process was easy! It can be hard to find a good contractor with value and integrity - Clear Window Technology has both! I'd recommend them to anyone looking for windows or doors.
Mike V.
Jul 18, 2021
Updated Review, 7/5/2021 Another great install by Clear Window Technology! Clear Window Technology has installed four sliding glass doors and three exterior patio doors in two homes for us. All were installed incredibly well, by a great team. and are doors Made in USA, AND also Made in Missouri! We highly recommend Clear Windows Technology! We also recommend having Clear Window Technology install for you doors from Target Windows & Doors, who are located in Vandalia, Missouri, which is near Mexico and Hannibal.

The sliding glass doors are the Elite 4000 sliding glass door, with blinds installed between the panes - the blinds rise and fall by one slider, and tilt open/closed by another slider. on the stationary side and on the sliding door. Dennis at Clear Window said this was the best door he offered and we agree it is great! The door slides so smoothly; the frame and door and locks are all solid.

They even installed a foot lock that lets you prop the door open a few inches, to let in some air, while preventing it from moving until your toe taps to unlock the door. The three patio doors are hinged doors, and were installed with new wooden frames, to replace the original frame that had some wood rot. Clear Window Technology did a great job pre-sales, and for install, and the doors look great - nice and new and sleek and clean!

Thank you, Dennis, Tracey! Original Review, 12/7/2017 Wonderful solid quiet smooth tightly sealed amazing and awesome & professionally installed were the first words I thought of when I got home and saw the amazing door that Clear Window Technology installed in our bay window. Our son also said - "This is a reallllly nice door!" And he's right!

We ordered the Elite 4000 sliding glass door. It has the blinds installed between the panes. Dennis at Clear Window said this was the best door he offered and we agree it is top notch. It is definitely tight and while our old door didn't seem to leak, we can tell that this one is keeping the cold air out better. The door slides so smoothly. it's just wonderful.

The frame and door and locks are all solid. And they even installed a foot lock that lets you prop the door open a few inches, to let in some air, while knowing it can only be opened after your toe taps the lock. All of this, and to top it off, not only is it Made in America / Made in USA, but it's also Made in Missouri, by Target Windows & Doors, in Vandalia, which is near Mexico and Hannibal.

Thank you to all at Target Windows & Doors for making such a fine door. Thank you to Dennis at Clear Window Technology for such a fine install, and for being an all-around professional in educating us on what to buy and getting it for us and for the nice install!
Bill Koch
Jun 22, 2021
I had three windows that would not stay up. I called Clear Window Technology, Inc talked with Dennis McHugh. Arranged a time for him to come to my home and look at the windows. He was on time and very professional in checking the windows. They could be repaired if he had the parts needed. Called later the same day that he had the parts. Arranged a date and time to do the repair. Dennis was on time and had all 3 windows repaired in under 30 minutes. I was very satisfied both with Dennis and the repair job. I would recommend Clear Window Technology, Inc. to all my friends and family.
Aleta Patneaud
Jun 22, 2021
We had them install windows in our house in 2017. These are the best windows. Outside sound is less and my hardwood floors and furniture that are by the windows do not fade. The house is much easier to keep at the proper temperature with less strain on our furnace and air conditioner which saves money. We have atrium windows that go from basement to almost the roof.

They were difficult to install but the installers were well trained and everyone very nice. A Professional job. Dennis McHugh is knowledgeable and well informed on his product line. We could not be happier. I love my windows!
Diane F.
May 13, 2021
I would not endorse this company. We selected Clear Window because they carry Anderson Doors. We bought a French patio door and had a scheduled install. I received a call about a week prior informing me that one of their install crews "up and left town" and could I reschedule. They initially wanted to push me out an entire month, but managed to fit me in the following week on a Wednesday.

Weather did not cooperate on that day, so rescheduled for the following day at 9:30. No one showed up at 9:30 and I was unable to reach anyone by phone until 11:45 when I received a call back. Other reviews have noted that the owner's wife "talks back" and "mouths off". I would agree with this as she hung up on us after we voiced concerns about the lack of customer service.

This was brought to the owners attention and his excuse was "she's new to the customer service business". Highly doubt it if this issue has come up before. Install was completed the following day but not too our satisfaction. After they left, we noticed that we could fit our entire fingers behind the wood molding around the door as it was not flush with the wall.

We contacted the owner who came out the next day and stated there "was nothing they could do" and it was OUR wall that was the issue. Since we didn't have this problem with our other door, I would venture to disagree with that. Nonetheless, my husband fixed it. So we paid them over $7000 for what? Stay away from this company!
Marci Breite
May 06, 2021
We sold our home and had a window that came back on the buyers inspection report as having a possible broken seal. Having used Clear Window Technology recently for window repair we knew we could trust them for a fair, honest and speedy review of the window in question. Dennis checked it out and gave us his written report of the integrity of the window, all on short notice so that we were able to meet the timeline required. We would definitely recommend Clear Window Technology.
Cathy Ellis
Apr 13, 2021
We are very happy with our new windows from Clear Window Technology! After getting several quotes to replace our large windows we chose Dennis because of his knowledge, competitive pricing and also received a higher quality product! Dennis and his professional crew have the experience to make the entire process very smooth, clean and stress free! I would highly recommend Clear Window Technology!
Kayla Lewis
Mar 22, 2021
Dennis was very professional from day 1. He was mindful that we had a newborn and was cautious and clean throughout the entire experience. Dennis was very knowledgeable about our custom window and they were resonably priced. We will definitely work with them again in the future! Services: Window installation, Glass installation, Window repair
Constance Finnigan
Feb 28, 2021
I was impressed with Dennis from our initial consultation. He kept me informed as to the progress of the job and his installation crew was equally as knowledgeable and professional as he was. Can't say enough about this family-owned company and would highly recommend to anyone needing window or door installation or repair. Dennis went above and beyond when he made a special trip to fix 1 additional thing.
Jennifer Rieger
Jan 15, 2021
This has got to be the most honest window repair company I've ever dealt with. I called to get an estimate of how much it would be to repair the thermal seals on 8 of my Andersen windows after my realtor noticed some condensation on them. Dennis came out, inspected them and said that although he'd love my business, my seals weren't broken. He gave me his card to keep him in mind for any other window repair needs. I was super impressed with the integrity.
Rob T.
May 27, 2020
Where do i even begin? Wish i could rate this company lower than a one but i can't so i want to save anyone else that EVEN considers this company some of the pain of doing business with this ship-shod operation. In a nutshell, no customer service, didn't show up during scheduled time and no call to inform me or reschedule; i had to call numerous times, answering service does not have a clue what is scheduled or what is going on.etc etc. VERY rude, very unprofessional, owners' wife mouths off in the background of my very frustrated business call(s) (!) They are full of ridiculous excuses, a complete waste of time. Go anywhere but here. It is glass -- it should not be that difficult. DO NOT PURCHASE FROM HERE.
Robert G.
Jul 10, 2019
Clear Window Technology installed 15 double hung windows and a sliding glass (with fixed pane) patio door in my home in May, 2019 and I could not be more pleased. While I researched other companies, CWT was my pick for three reasons: a very competitive bid; a solid and thoughtful, but not pressured, presentation by the owner of the business, Dennis McHugh; and a very well-built product (the Elite Series) manufactured by Target Windows and Doors here in Missouri. Installation went very smoothly.

I was especially impressed by the lead installer, Cliff, whose skill, patience and attention to detail were evident. Now that I have lived with these windows and door for two months, I am very satisfied. All are sturdy and performing extremely well. I no longer hear outside noise to the same extent as before, and I have raised the ac temp level in my home by a few degrees with no loss of comfort (saving a few bucks in electric costs).

One caveat: CWT is not a large mass retailer so installation of several windows may not be done in a day. But if you want a well-installed and quality product at a good price, you won't mind that at all.
Carrie N.
Jan 09, 2019
Very dishonest company. Had a broken thermal seal on a window in a condo I was about to sell, and received their name from the condo board as being a reputable vendor. Dennis came out, inspected the window, and gave the bid. A whopping 4 weeks after Dennis promised installation (he knew we were waiting for the installation to list the property), they finally came out to repair the window after calling and harassing him numerous times. $1000 and 2 month wait- thermal seal was finally fixed but then the window wouldn't open?!

His explanation: "The casement around the window is rotted- not our issue". It opened before you showed up today to "repair" it, but now it is broken?! Again- his response: "Your issue not mine." I was proactively dealing with the broken seal so It wouldn't affect the listing. I can't sell a property with a broken window that THEY BROKE?!

As a window professional, he should have said "Ma'am- you really need a new window instead"?! I truly found that out when I had a second company out to replace the now BROKEN window and it was the SAME PRICE as Clear Window Technology's botch repair?! Irritating. My dealing with Clear Window Technology was a waste of time and money, and caused a ridiculous amount of stress with ZERO responsibility taken by them. Dennis disappeared after my debacle and never followed up.

I just cut my losses, had another company replace the window, and reported them to the condo board so they would NEVER refer them again. That being said, I vowed to eventually post this review. Public Buyer BEWARE!
Bill L.
Sep 29, 2018
First the Address is a UPS store and the STE number just a box at the UPS store. On September 12, 2017 Cliff and Carlos came out to replace two 21x 31 windows in our kitchen for the cost of $535. After installation was complete I gave them a check for the balance, but then my wife noticed the glazing strip had been broken and glued to the window. They promised in writing they would fix it free, they said they would be back in 2 or 3 days.

After many calls and emails to them and the BBB and a request for arbitration they replaced the part, on 25 October 2017. Carlos pounded on the window in an attempt to replace the glazing, but finally cut the part smaller to get it in. On January 17, 2018 the window cracked from the top down to the middle. The refused to replace it, saying they only covered it for 30 days, so we went to arbitration with BBB and won, half of the total cost.

When another company came and replaced the window, the installer said, in his opinion the window glass had been chipped at the top when installed. As part of the arbitration we were to return the window to the address shown on the website only to find it was a UPS store and no one would accept it or call the company to come and get it. We had emailed them twice letting them know we were going to return it, but no one replied.
Wanda Herron
Apr 16, 2017
Dennis was very easy to work with. We love the products and compared features and prices with several companies. He worked with us to match or beat prices and warranties on similar products from the other companies I interviewed. This is someone who works hard to get your business. I like that. Some time after installation I noticed a small crack in one of the windows that had been installed in a second story window. Dennis was here within an hour of the call, took pictures of the crack and ordered the new window. Nice.