The mid-bar of a single hung window can be adjusted up or down to accommodate plantation shutters or furniture. By controlling the sight lines, we make sure you are happy with the view from the inside looking out.
A simple yet elegant design featuring a contoured profile will have you feeling extra proud of your home's curb appeal.
Our Signature Series windows offer value with style, safety, energy efficiency, and strong performance. Plus with superior-quality glass, you'll enjoy year-round thermal protection.
EnviroSeal nXt outperforms other single-seal and dual-seal spacers. Windows built with EnviroSeal nXt exhibit the lowest failure rates in the industry which is ideal with insulated glass units. Considered the glass spacer of the future, this warm-edge glass spacer is highly energy efficient.
Designed without metal, the spacer conducts less thermal energy thus improving the edge of glass temperature by as much as 16.6° F when compared to other spacer systems. By regulating the thermal transfer, windows with EnviroSeal nXt technology will keep your home comfortable year round.
Cardinal LoÉ3-366 offers the ultimate experience in window performance glass. This glass delivers the perfect balance of solar heat control and high visibility. It also provides peak levels of year-round comfort and energy savings, making it the perfect glass regardless of which part of the country you live. With three layers of silver on the glass, you are certain to enjoy year-round thermal protection all day, every day.
Installing ENERGY STAR® qualified windows lowers energy bills and saves you money over single-pane and even new double-paned, clear-glass windows. Windows with our high-performance glass package are ENERGY STAR® qualified for all regions.

Watch this video for a quick overview of our exclusive Brennan Signature Series single hung windows.
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Ella A. - Verified Purchaser
Below are some of the questions we get the most. If you can't find your question, please reach out and ask your question today.
We do not repair existing doors or windows. If you would like a free estimate for replacement windows or doors, please give us a call.
If you are an existing client and are having an issue with a product we’ve ordered and installed please contact our service department for assistance.
LEARN MORE: Dealing with Sticking Windows and Doors.
We’re local! Our headquarters is in Arlington, Texas, close to where we were founded. Since 1979, we’ve worked with homeowners across the Texas Golden Triangle. We’re not a national brand, franchise, or private equity–backed. Brennan is a true Texas treasure and we intend to stay that way for generations.
Yes, we’ve worked with trusted financing partners to put together flexible financing plans that work best for you and your family.
Yes! We bring them to your consultation so you can see your options up close.
Wondering if we serve your area? We proudly offer window and door replacement services across Texas, including:
Since our founding in 1979, we've offered window and door replacement services to homeowners in the Dallas-Fort Worth Metroplex.
Our headquarters is located in the Entertainment District of Arlington, Texas. Feel free to drop in during business hours to get a feel of our products in person.
Brennan Enterprises proudly serves homeowners in the Greater Houston area, delivering trusted window and door solutions backed by expert installation.
Ready to experience the difference of working with Texas’s leading window and door replacement company? Book your free consultation today and let’s create something amazing together!