Green-roof feasibility brief
Yenra | Updated September 10, 2026
Article: https://yenra.com/green-roofs/

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Planning aid for a building owner and qualified project team. This is not a design, loading specification or installation approval.

Building / address / owner:
Primary objective and measurable outcome:
Access: maintenance only / occupied amenity / other:
Drawings / roof age / leak history / warranty:
Structural professional and assessment status:
System / saturated assembly and other load assessment reference:
Roofing professional / waterproofing compatibility:
Drainage and overflow / inspection access:
Local code, permit and stormwater authority:
Planting / climate / irrigation / establishment plan:
Maintenance owner / designer-supplied schedule / annual budget:

Alternative A / alternative B / common scope / analysis period:
Incremental initial cost:
Annual benefits, each with evidence and eligibility:
Additional annual maintenance:
Net annual cash saving = recurring benefits - added recurring costs:
If positive, simple payback = incremental cost / annual saving:
Fictional example: 50,000 / (1,200 + 300 - 1,000) = 100 years.
If net saving is zero or negative, positive simple payback is unavailable.
Calculation excludes discounting, replacements and noncash benefits.

Missing investigations / responsible professional / due date:
Decision and conditions before detailed design:
Maintenance and performance review date:

Primary references consulted for the accompanying guide:
https://www.epa.gov/heatislands/using-green-roofs-reduce-heat-islands
https://www.gsa.gov/governmentwide-initiatives/federal-highperformance-buildings/highperformance-building-clearinghouse/water/planted-roof
https://www.gsa.gov/cdnstatic/The_Benefits_and_Challenges_of_Green_Roofs_on_Public_and_Commercial_Buildings.pdf