Windish RV Center plans to construct a new building on its nearly 7-acre site at 10300 E. Interstate 25 Frontage Road in Frederick — just east of Longmont — to consolidate its sales and services operations under one roof. Currently Windish’s sales operation is on the east side of I-25 and the service center is on the west side. The new building is planned on east side of the highway. on Facebook on LinkedIn