County of Sonoma – North County Detention Facility

Allana Buick & Bers, Inc (ABB), was retained by the County of Sonoma for roofing replacement design services for Building 301, located at the North County Detention Center Facility in Santa Rosa, California.

The North County Detention Facility was constructed back in adjacent to the Charles M. Schulz Airport. The site originally housed the Santa Rosa Army Airfield (SRAAF) during World War II. After WWII, SRAAF was deactivated and subdivided into several parcels. In 1967, one of these parcels became the “honor farm” for minimum security inmates.

The NCDF sits on 15.3 acres with 9.62 acres for the facility and 5.91 acres used for the Agriculture Program. Building 301, located on the NCDF site, is a one-story, wood-framed structure that contains approximately 7,200 SF of roof area overall. There is also an adjacent pathway which was covered by a wood-framed canopy that had a similar shingle system installed.

A majority of the roof was covered with a composition shingle system, with a small, lower eave roof, pitched at 2:12 having an asphalt and gravel, hot applied roof system with pea-sized rock aggregate partially embedded in asphalt. The roof had a separation wall which is clad with T1-11 siding, with the top of the walls having sheet metal coping cap installed.

ABB services included roof replacement design, construction documents, and limited construction administration.