Common problems and how to troubleshoot them for green roofs Common problems and how to troubleshoot them for green roofs

Common problems and how to troubleshoot them for green roofs
Link to this table

Symptom	Possible causes	Solution
Standing water within the green roof for more than 72 hours	The drain pipe may be clogged with sediment or debris due to erosion or compaction	Clean the drain pipe using the access point. Address any erosion through more plantings. Limit access to the green roof to prevent compaction.
Vegetation is not able to establish	Plant selection is inappropriate for the site, they are not getting enough water or sunlight	Consult with a landscaper or horticulturist. Check that plants are suited to the local conditions. Water during the first growing season and during droughts.
Leaks inside the building	The underlying membrane may have been damaged	Identify the location and repair the damaged portion of the membrane