Green roofs can help cool cities in the summer heat, but building them is only the first step. Many don't survive

As summer temperatures soar across the United States and Europe, cities are being forced to confront the difficult reality that they're getting dangerously hot.

The top 3

1. Inadequate Drainage Systems: Poor drainage is a primary cause of green roof failure, leading to waterlogging, root rot, structural stress, and compromised waterproofing membranes.
2. Incorrect Plant Selection: Choosing plants unsuitable for the specific climate, substrate depth, or roof conditions often results in plant stress, poor growth, or complete die-off, compromising the green roof's intended benefits.
3. Insufficient Maintenance: A lack of regular maintenance, including weeding, irrigation, and drain clearing, is a significant factor in green roof degradation, leading to vegetation overgrowth, clogged systems, and overall failure.

Sources

• Phys.org

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