Cascade Windows of Spokane, Wash., a maker of vinyl windows and sliding doors, has been sold by its owner, Altamont Capital Partners, to CenterOak Partners, another private investment firm.

Terms of the deal were not disclosed.

“The investment marks a significant milestone for our firm as the first acquisition in this fund,” said Randall Fojtasek, managing partner of CenterOak. “Building products is a subsector we know well and have invested in previously. Our investment and operations team is highly skilled in the industrial growth sector and we are pleased to have the opportunity to collaborate with the management team at Cascade Windows. Cascade has a compelling history of organic and acquisitive growth and a strong suite of products, and we believe the company is well-positioned for continued success building on this business model.”

“We are excited to partner with the CenterOak team on our next phase of growth,” said Randy Emerson, president and CEO of Cascade Windows. “The firm has an impressive track record of building value in companies, including significant experience in supporting strategic add-on acquisitions, product line extensions and operational improvements. We look forward to leveraging our new partner’s operational and industry expertise to further our position as a market leader.”

Cascade Windows has been designing, manufacturing and selling vinyl windows and sliding doors for more than 25 years. The company has an extensive network of dealers, builders and distributors in the western United States, including Arizona, California, Colorado, Idaho, Montana, Nevada, New Mexico, Oregon, Utah, Washington and Wyoming.

Cascade Windows has expanded its geographic reach in recent years through a number of strategic acquisitions, including Paramount Windows (2014), Empire Windows (2011) and LbL Windows (2009).