Get matched with top window and door contractors in O Fallon, MO

"Everything went great! We had an issue with one of the installed windows and they came back out and fixed it at no charge."

"Hyperion came out and gave a quote for the window replacements. Explained the work that would be done and how it would be done. Showed up on time to do the work and did a fantastic job. So rare now days that someone actually says what they are going to do, does it well and professionally."

"Very professional yet down to earth. Best price I found with great quality work. Answered every question I had and gave me a great sense of comfort throughout the whole process. Very time efficient. Replaced 14 windows, added a bay window, replaced 2 sliding glass doors, and replaced an existing garage door with a 4-panel sliding glass door. Only took 2 and a half days!"

"John did an absolutely fantastic job replacing two French patio doors on our home. He was very attention to detail and the finishing of them was far and away better than we had originally. He was very efficient yet took the time to make sure every aspect of his install was perfect! Can't say enough great things about the job done. Would recommend without hesitation!"

"Steven came in an out and fixed a broken door lock and replaced the doorknob in about 45 seconds. Incredible work, will absolutely hire again."

"They did a fantastic job installing my windows. Everyone I have spoken with was friendly and very professional."

"Absolutely will hire for future jobs, have a major one planned in Spring . Very efficient and I highly recommend them. Very courteous and keep you informed."

At Sane Windows and Doors, we believe in making the window and door buying experience as easy and transparent as possible. That’s why we stand out with superior customer support—from the moment you contact us to long after your project is complete. Unlike traditional sales-focused window companies, we skip the high-pressure pitches and in-home visits. With our no-sales-pitch appointments and simple online pricing, you can explore your options, get a quote, and make decisions—all from the comfort of your home. It's window shopping made easy, without the hassle.

"I used H&F exteriors to install windows in a 130 year-old historic property. The old windows were crusty and inefficient. The new windows are great, and have cut the heating and cooling bills in half. H&F and their team were terrific to work with, honest and responsive."

Universal Windows Direct was originally founded in Cleveland, Ohio in 2002 by William Barr and Michael Strmac. It was their mission to create a home improvement company that offers high quality home improvement goods at the best possible value. What began as two guys in a 350 square foot office quickly grew to become one of the nation's leading remodeling companies. Today, Universal Windows Direct represents thousands of customers and has a rapidly growing network of locations nationwide, all of which are actively involved in the communities they serve. Universal Windows Direct opened Universal Windows Direct of St. Louis to serve St. Louis customers in 2017.