As a result the roof structure can require less maintenance saving the owner money in replacement costs over the long term life of the roofing system.
Green roof lifespan.
In europe where they have been building with green roofs since the 1960s green roofs have been known to last for from 30 to 50 years.
A properly installed and maintained green roof should extend the life of the roof 2 3 times its normal life.
Irrigation wastes water and energy both are what the green roof should be conserving.
30 to 50 years is not an unusual lifespan for green roofs in europe.
How long will my roof last with a green roof.