Kansas City Replacement Windows, Doors & Vinyl Siding

Cornerstone – We’re in Your Corner

Dozens of Window and Door Brands Under One Roof

Cornerstone is a Kansas City window company, entry door replacement company and vinyl siding installer. If you live in the Kansas City area, you may have noticed a trend. Big manufacturers want to sell you one replacement window, their window. They tell you why it’s better, more energy efficient, made of the best materials, and tout all of their features. But how do you know if it’s the best window for you? At Cornerstone, we approach it a little differently. We carry dozens of brands of windows (and doors and siding too) and we can tell you the advantages of every single brand from a non-biased viewpoint. After all, that’s what you really need. We take our experience of over 40 years in the home improvement business and help you find the right window for your home, your situation, and your budget.

Cornerstone Awarded “Best of the Best”

The Win“duh” Factor of Window Replacement in Kansas City

When you talk to a representative of a window manufacturer, you’re going to hear how great their windows are. You’re going to see all the fabulous features, and you’re going to hear about the energy efficiency, ease of cleaning, security features, even that they’re made from “space age” materials. Each and every manufacturer will tell you that their windows are the very best…duh! What else would you expect them to tell you? Their job is to sell you that specific window. They’re not going to tell you anything negative about it. The sad fact is, that same representative could change jobs tomorrow and tell you why the windows he/she is selling for the new company are the best money can buy. The bottom line is you need an unbiased opinion and straight facts to make the best decision. You need to be able to compare windows. You need Cornerstone. At Cornerstone, we carry dozens of brands. We’ll show you different options and let you decide after comparing all the facts. Don’t fall victim to the win”duh” factor. Shop the smart way with Cornerstone.

Installation Experts For Your Home Windows, Doors and Siding

Did you know that 60% of a window’s performance depends on the quality of the window installation service? You can buy the best window in the world, but if it’s installed poorly, it won’t perform as promised. At Cornerstone, we take installation very seriously. We have experienced crews who know what they are doing and use the best materials. Our installers take pride in their work. They know the Cornerstone name stands for something and that’s important to them. When you hire Cornerstone, you know the job will be done right. We’ve been installing windows, doors and siding for over four decades and we value our reputation over all else. That’s why we offer our lifetime installation warranty. Remember, We’re In Your Corner…With us, it’s all about TRUST.