Cornerstone Home Improvements is a family-owned window replacement company serving Kansas City, MO. Established in 1970, they specialize in windows, doors, and siding, offering a range of brands to help customers make informed decisions. Their windows feature Super Spacer® technology, a no-metal, polymer foam spacer that improves thermal performance and energy efficiency. Cornerstone emphasizes educating clients to avoid common pitfalls in window purchasing and provides unbiased advice to find the best fit for each home and budget.

Mac Brian Doors & Window Installation is a company based in Kansas City, MO, specializing in window and door repair and replacement. They offer energy-efficient window installations, door upgrades including custom and automatic doors, and custom carpentry services. Their capabilities include both residential and commercial projects, with expertise in installing and repairing various door types. The company emphasizes quality workmanship and flexible scheduling.

STL Windows Direct is a family-run window replacement and sliding glass door installation company based in St. Louis, MO. They serve St. Louis and surrounding areas including Lake of the Ozarks, Jefferson City, and Columbia, MO, as well as parts of Illinois. The company offers energy-efficient windows and exterior doors designed to improve home comfort and reduce energy costs, featuring products from ProVia and Pella that are ENERGY STAR®-rated. With over 80 combined years of industry experience, STL Windows Direct provides personalized service and durable installations tailored to the local climate.

Mills Window & Door Showroom is a locally owned company serving St Louis, MO, specializing in window replacement and sliding glass door installation. With over 25 years of experience in the window, door, and siding industry, they offer products from top brands like Pella, Andersen, and James Hardie. Their services include consultation, product selection, and professional installation, focusing on providing quality and value for home improvement projects.

Glass Doctor of Greater St. Louis provides window repair and replacement services in St. Louis, MO. They serve residential, commercial, and automotive customers with glass installation, repair, and maintenance. Their team offers 24/7 emergency service and supports insurance claims to simplify the process. With over 60 years of experience in the glass service industry, they provide capabilities such as windshield replacement and home and business glass solutions. The company also offers a Glass Doctor Advantage Plan that includes priority scheduling and a breakage guarantee.

Mad City Windows & Baths of St. Louis is a home remodeling company serving St Louis, MO. They specialize in window replacement, bathroom remodeling, and kitchen remodeling, offering a variety of window styles such as vinyl, bay, bow, casement, double hung, and sliding windows. The company provides custom bathroom installations including walk-in tubs and bath liners, as well as kitchen cabinet refacing with features like soft-closing hinges and roll-out shelves. With over 20 years of experience and more than 50,000 completed projects, Mad City Windows is a family-owned business that emphasizes American-made quality and offers lifetime warranties on their work.

Masonry & Glass Systems Inc is a window replacement and sliding glass door installer based in St Louis, MO. They offer a range of high-quality products including Restorations replacement windows, Pro-Via and Sunrise entry doors, and glass block basement windows. The company emphasizes craftsmanship by using their own installers rather than subcontractors, ensuring consistent installation quality. They provide energy-efficient entry systems with a lifetime limited transferable warranty and specialize in custom glass block designs that enhance security and privacy while offering design flexibility.