Get matched with top window pros in O Fallon, MO

"We absolutely love our windows"

"The owner himself came to my home, unaware until the installation occurred that the owner was friendly, knowledgeable and helpful for my small window replacement. Treated me with the utmost courtesy as if it were a large job. He made a promise and fulfilled that delivery on day before Thanksgiving. I would recommend Hyperion for any glass or window job hands down. I tried to tip the service man on the return and He said no thank you it’s our job! That tells me that Hyperion is also a great place to work. Happy employees make happy service calls!"

"professional, cleaned up and quality of windows is great"

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.

"The owner/operator Brad was very professional. He helped us pick out a new storm door that looked really great with the exterior. The install went very smooth and fast without any issues. After the job was completed zero waste was left behind. Overall we are very happy. We highly recommend this company."

"My new windows look great! Very professional to deal with, work was done on time and for a fair price. Would recommend to anyone looking for replacement windows!"

"We used A Pane in the Glass for a broken seal replacement in our window. Great communication, fair price and quality work!"

"The owner was quite knowledgeable and gave a very reasonable estimate for the installation of eight windows. The work crew were professional, friendly and did an excellent job, including cleaning up when finished. I highly recommend them!"

"Everything was done very professionally"

"Alex Faires was a fantastic project manager. We had extensive hail damage and had to replace our entire roof, siding and gutters. Alex is knowledgeable and took the time to answer all of our questions. Alex was very responsive and kept us informed on scheduling and material deliveries every step of the way. H&F handled everything directly with our insurance, making the process seamless and hassle free. Alex coordinated multiple crews to minimize the disruption and all of the work was completed ahead of schedule! We are very happy with the results and highly recommend Alex and H&F!!"