Milgard Windows

Milgard is one of the largest, most trusted names in home windows, serving the Western U.S. and Canada with over a dozen full-service facilities and Customer Care Centers. We believe that by being close to our customers, we can provide you better service. This means faster lead and delivery time, as well as a quick response to any window warranty situations.

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United Windows and Siding is your formula for success!

Quality windows plus the window installation expertise and experience of United Windows & Siding is the formula for a window replacement home improvement project that rates great reviews from customers.


We provide service in the Colorado cities of Denver, Arvada, Golden, Centennial, Highlands Ranch, Parker, Castlerock, Littleton, AuroraWheat Ridge, Colorado Springs, and surrounding areas.


Our Iowa office provides windows and siding installation services to clients in the following Iowa cities of Marion, Coralville, Iowa City, Waterloo, Muscatine, Cedar Falls, Grinnell, Dubuque, and surrounding areas.

Get a free quote today!


100% Lifetime Warranty

Our products are backed by our true 100% lifetime warranty* with no trip fee and no labor fee! An investment in new windows or siding from United Windows & Siding will increase the value of your home, because our warranty transfers to the new homeowners when you sell.
Call 720-535-4767 for details.

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