Changes

Ongoing maintenance should occur at least twice per year (Magco, 2003) and should

Ongoing maintenance should occur at least twice per year (Magco, 2003) and should

include:

include:

* [[Green roofs#Planning Considerations#Design for Maintenance|Weeding]]: Remove volunteer seedlings of trees and shrubs. Extensive green roofs are not designed for the weight of these plants, and the woody roots can damage the waterproofing.

* [[Green roofs#Design for Maintenance|Weeding]]: Remove volunteer seedlings of trees and shrubs. Extensive green roofs are not designed for the weight of these plants, and the woody roots can damage the waterproofing.

* [[Green roofs: Planting|Debris and Dead Vegetation Removal]]: Debris and bird feces should be removed periodically. In particular, the overflow conveyance system should be kept clear.

* [[Green roofs: Planting|Debris and Dead Vegetation Removal]]: Debris and bird feces should be removed periodically. In particular, the overflow conveyance system should be kept clear.