About Us
Hi, I’m Marshall McKinney. I’ve spent over a decade in the home improvement industry, and I started this company because I believe homeowners deserve a better way to buy windows.
Our Story
About Cornerstone Exteriors
I’ve spent over a decade in the home improvement industry, and along the way I saw something that bothered me, the way windows get sold to homeowners.
If you’ve ever invited a window company into your home for a free quote, you probably know the script. A late appointment, hours at your kitchen table, a glossy binder, a sky-high number that somehow drops 40 percent if you sign tonight. That’s not how it should work.
No four-hour pitch. No fake discounts.
The Problem
How windows get sold today
They show up at 6 PM and sit at your table for three or four hours. They pitch the premium package, then the price, then a manager phone call, then a discount, then another. By the end of the night you’re exhausted and not sure if you got a fair deal, or just got worn down.
A Better Way
Why homeowners choose us?
I started Cornerstone Exteriors because homeowners deserve a simple, honest experience when they’re investing in their home.
Real pricing, before we ever talk.
Build your estimate yourself. Take your time. No obligation, no email wall, no salesperson hovering.
A real installer at your appointment, not a closer.
When we come out to measure, you're talking to someone who does the work, not someone whose paycheck depends on a signature tonight.
One fair price. No theatrics.
No fake discounts, no manager call-ins. Just the number, what's included, and what to expect.
Windows, siding, and doors, done honestly
We install high-quality vinyl windows, siding, and doors for homeowners across the Denver metro area. One thing, done well.