Sep 2026
The guys really turned my aging home into something I am proud of again. They showed up and did the work needed. House looks new! Plenty of compliments. Price was very fair. Would hire them again if needed.
About Ultimate Exteriors of Colorado
Ultimate Exteriors of Colorado is a residential siding specialist dedicated to providing high-quality, long-lasting results. They are the #1 siding company in the U.S. for quality workmanship, as named by James Hardie Siding, a leading provider of fiber cement siding products.
Ultimate Exteriors exclusively installs James Hardie® siding, known for its superior fire, rot, warp, and termite resistance, as well as its extraordinary warranties.
Customers praise the company's professionalism, attention to detail, and excellent communication. They appreciate the opportunity to speak directly with the installers and discuss specific project needs. The company is known for its precise and accurate installation, which enhances the aesthetics and value of homes.
Ultimate Exteriors also offers window replacement services and is highly recommended for both siding and window projects.
Reviews
May 2026
One word, AWESOME!! The whole experience was great.
The crew was on time, did everything very profffessionaly.
Didn't damage anything, never left a mess,
and completed the work on time and on budget.
Ultimate Exteriors was also the low bid.
They didn't ask for money up front.
In fact they didn't ask for money until the inspection completed.
I would highly recommend this company to anyone!!!
Very profffessional from start to finish!!
The people who showed up to are the bid also were the installers.
There's no confusion when dealing with them.
Apr 2026
Ultimate did an outstanding job of replacing my pressed board siding with John Hardie siding. Drew, Donald and the rest of the crew went out of their way to make sure that all of my concerns were addressed. And the bid price was significantly lower than other companies that I consulted for a bid. If you want siding or other repair work, Ultimate Exteriors is the best to be found.
Photos
Hours
Monday 8AM - 5PM
Tuesday 8AM - 5PM
Wednesday 8AM - 5PM
Thursday 8AM - 5PM
Friday 8AM - 5PM
Saturday Closed
Sunday Closed
Location
8640 Welby Road, Thornton, CO 80229
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