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Our Work


Quality Products Installed by Craftsman

For 26 years Colorado Window and Siding has provided Denver, Boulder and Colorado's front range communities with the very best in window, door and siding solutions. Representing only quality manufacturers, and offering a diverse set of solutions and price points, our first goal has always been to give the customer great products with outstanding installation workmanship and professional service. Here are just a few of many customer testimonials and some examples of our work. Please contact us to learn more.


"Every time we look out of our windows and
do not hear the buses pass, or feel the
weather, or have to adjust our thermostat,
we think of Colorado Window & Siding!"

- Luther & Marguerite S., Aurora


"I just wanted to tell you that the team you
sent over to do the job was great. They got
the job done well and on time."

- Kim K., Boulder


"After all these years, we still tell everyone
you were far and away the best salesperson
we have ever dealt with!"

- Randy & Sue S., Brighton


"Just a quick note to let you know how very
pleased we are with the windows, the
staining,and the overall craftsmanship,
evidenced by the bay window installation."

- Greg M., Louisville


"We are people who usually do home projects
for ourselves, and have found over the years
that the few times we have hired people to do
jobs for us we are disappointed in their work.
The crew that installed our siding was
remarkable. They came when they said they
would, they were professional and friendly,
and we have never seen people work so hard
and consistently. We want to congratulate
you on hiring such great employees. If
everyone who does home repairs were this
good, we’d probably quit doing so much
for ourselves!"

- Eric & Deborah B., Arvada


"Bravo – We are very happy with our new
windows and doors. Good prices, products,
and customer service."

- Paul V. & Suzy N., Pine Grove


"You guys did my house last year and recently,
part of my office building. Scott, your installer,
and folks at the showroom are extremely
professional and the quality of product and
work are something that is rarely found these

- Greg S., Wheat Ridge


"In the late 90’s, we needed two sets of patio
doors and all the windows in our home replaced.
Recently,the patio doors started sticking and
one became hard to move. Your service man
showed up (early!) and did a thorough and
excellent job repairing our doors. All at no
charge and about 8 years after the initial
installation! Thanks for your customer service.
It’s a rare commodity these days."

- Matt G., Littleton

"I love the windows your company installed
and I always try to send customers your way."

- Laurie A., Centennial

"Just wanted to say an extra thank you for
your work and the way you went about it. Ric’s
expertise is obvious and smiling face was
reassuring, even as irregularities popped up on
the original construction of our house. We’re
very grateful for the work that you did."

- Bill & Connie S., Boulder

"I want to let you know how pleased we are with
the new windows. Your installer was always
punctual and did an excellent job. Don’t let him
get away because I’m sure that you know, skilled
craftsman who are conscientious are hard to find."

- Patricia P., Denver


"The quality of the service was outstanding! The
crew you sent out to my home for the installation
was the most polite, gracious, and well mannered
young men."

- Jenny K., Denver


"We can’t say enough about Mark. He did an
excellent job on the removal and installation of
our windows. He knew exactly what he was doing,
was considerate about the condition of the rooms,
and made sure the rooms were spotless each day."

- Michael T., Boulder


"Just wanted to tell you how much we are satisfied
with the job that you do, from the quote to the final
result, everything was done beautifully."

- Kyle & Heather V., Longmont