Renovation of a municipal facility in Olympia, Washington. Design plans call for the renovation of a municipal facility.

The comprehensive roof replacement project will remove the steep slope copper standing seam roofing, underlayment, and insulation and rebuild the roof with rigid insulation, self-adhered roofing membrane, and standing seam roofing in-kind. The project will also replace the low slope PVC roofing and install fall protection upgrades and arrest anchors for secure access to the steep slope roofs and gutters. The building’s preservation and maintenance needs can be attributed to natural building material life cycles, and unconventional installation of flashings and roofing. To address these issues in a systematic way, this project will complete a comprehensive roof replacement of the copper standing seam roofing to respond to all problem areas and sources of water infiltration. This project will prevent future damage to the building by mitigating the roof leaks. Additionally, installation of appropriate fall restraint and fall arrest system will facilitate the routine maintenance. The Old Capitol Building has experienced serious and ongoing water infiltration issues throughout the years. The 1892 component of the building has been especially problematic, likely due to greater complexity in roof form requiring more intricate installation details compared to the East Annex. Lack of redundancy in the detailing and installation of the copper standing seam roofing are the main contributors to ongoing water infiltration issues. Page 2 of 9 Additionally, limited resources for routine maintenance and gutter cleaning have led to clogged downspouts. Clogged downspouts have resulting in standing water in the gutters and overflowing gutters during regular rain events. These factors contributed to visible water damage at exterior masonry and wood windows, as well as interior water infiltration at the eaves. Replacement of the single ply membrane system on the low slope roof areas is included in this project. The low slope roofing areas, while currently in reasonable condition, are near the end of the 20-year life expectancy and the replacement of the copper roof system is likely to contribute to an accelerated wear and tear on this single ply membrane roof. Concurrent replacement will provide overall cost saving and prevent future water infiltration in the East Annex portion of the building.