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Blue roofs can also be fitted with smart controls and electrically operated valves to regulate water discharging from the roof. The electrically operated valves can be tied to predictive weather algorithms to forecast incoming rain or snow events as well as extreme heat days. Based on the weather forecast, valves may be opened and closed to accommodate additional rain or snow loads. When coupled with a rainwater harvesting system, blue roofs increase rainwater storage capacity to meet non-potable water demand (i.e. toilet flushing or irrigation) without the need to oversize tanks. Rainwater harvesting tanks with smart controls are able to coordinate with blue roofs to draw water from the roof when the tank water level is low to meet demand and offset municipal potable water use. <ref>Credit Valley Conservation. 2018. Smart Blue Roof Project Literature Review Report. Credit Valley Conservation, Mississauga, Ontario.</ref>
Blue roofs can also be fitted with smart controls and electrically operated valves to regulate water discharging from the roof. The electrically operated valves can be tied to predictive weather algorithms to forecast incoming rain or snow events as well as extreme heat days. Based on the weather forecast, valves may be opened and closed to accommodate additional rain or snow loads. When coupled with a rainwater harvesting system, blue roofs increase rainwater storage capacity to meet non-potable water demand (i.e. toilet flushing or irrigation) without the need to oversize tanks. Rainwater harvesting tanks with smart controls are able to coordinate with blue roofs to draw water from the roof when the tank water level is low to meet demand and offset municipal potable water use. <ref>Credit Valley Conservation. 2018. Smart Blue Roof Project Literature Review Report. Credit Valley Conservation, Mississauga, Ontario.</ref>
==Inspection and Maintenance==
An inspection and maintenance plan is crucial to the success of a [[blue roof]] system and should be updated based on the results of the first-year post-construction monitoring. The plan should include a maintenance schedule developed for the entire life of the rooftop system. Aspects that need to be included:
#Maintenance activities required to be completed per week/month/season/year;
#Frequency or maintenance and inspection activities;
#Timing of said activities; and,
#Assigning the appropriate person/consultant (entity) responsible for completing the activity should be included.
Inspections will need to occur within 24 hours of significant rain events (>25 mm) to ensure the specified ponding depths and drain times are being achieved as per design specifications, standing water does not persist for more than 24 hours, and there are no leaks occurring due to damage to the roof membrane or as a result of other underlying roof conditions (NYCDEP, 2012a).<ref> New York City Department of Environmental Protection (NYCDEP). (2012). NYC Green Infrastructure Plan: 2012 Green Infrastructure Pilot Monitoring Report. Retrieved from: https://www1.nyc.gov/assets/dep/downloads/pdf/water/stormwater/green-infrastructure/2012-green-infrastructure-pilot-monitoring-report.pdf</ref>.
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:
https://www1.nyc.gov/assets/dep/downloads/pdf/water/stormwater/stormwater-design-construction-guidelines-2012-final.pdf.<ref/>). In addition, adequate maintenance of the secondary drainage system is essential to ensure its performance in the event of a failure of the roofing system. The rooftop system and membrane should be evaluated every 20 years to assess the need for replacement. Maintenance access points should be clearly identified in the plan for the system. Special training required to perform specific tasks is required for the appropriate person/consultant (entity) responsible for completing the specific maintenance activity.