Maintenance activities for blue roofs should focus on preventing [[clogging]] of drainage [[inlets]] and deterioration of the roof membrane (NYCDEP, 2012b)<ref> New York City Department of Environmental Protection (NYCDEP). 2012. Guidelines for the Design and Construction of storm water Management Systems. Retrieved from: | Maintenance activities for blue roofs should focus on preventing [[clogging]] of drainage [[inlets]] and deterioration of the roof membrane (NYCDEP, 2012b)<ref> New York City Department of Environmental Protection (NYCDEP). 2012. Guidelines for the Design and Construction of storm water Management Systems. Retrieved from: |