Alder Doors products are made in the USA

Sun Mountain, Inc., was founded in 1998. We are an industry-leading manufacturer of custom high-end wood doors, mouldings, and wood beams. We supply customers throughout the U.S. from our 105,000 square foot factory/headquarters in northern Colorado (near Fort Collins). To learn more about our custom products, please visit our corporate website

We are pleased to offer, providing a value-priced line of Knotty Alder doors, all made in the U.S.A. at our Colorado factory. These doors are designed to compete with the growing volume of low cost, and typically lower quality, imports from China. As always, we offer the most competitive pricing through our “direct from the manufacturer” distribution model. We also offer value-added factory pre-hanging and pre-finishing of these doors—further reducing construction time and project cost. And, we ship pre-hung doors (single units) direct to the home or jobsite, eliminating on-site re-assembly. All of our Knotty Alder doors are covered by an industry-leading Warranty.

Thank you for visiting by Sun Mountain. We look forward to supporting your needs for the highest quality U.S. made Knotty Alder doors.

Cory Barnett

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