ROOF ASSESSMENTS

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GreenDeck Climate Commons • rainwater planning

Calculate a weather-informed property plan.

Estimate a single rain event, look up a seasonal local forecast, and compare storage goals to inform a site-specific design.

01 · rain event

What can your roof catch?

One inch of rain on one square foot of roof produces about 0.623 gallons. Adjust the inputs to model a specific event.

Efficiency accounts for first-flush diversion, gutter losses, screens, and normal system conditions.

Rain on roof—gallons
Captured water—gallons
Cistern fill—of stated capacity
Potential overflow—gallons
Captured volume—cubic feet

02 · local rainfall

Find your local forecast.

Enter a U.S. street address. The planner checks the next 24 hours, a typical wet-day rain event from the last 10 years, and a 90-day precipitation outlook.

Resolved locationAdd an address—
Next 24 hoursForecast not loaded—
Typical rain eventHistory not loaded—
90-day outlookOutlook not loaded—
Season roof captureNot calculated—
Latest station hourObservation not loaded—

Your address is used only for this opt-in lookup. Census JSONP resolves the address; if it is unavailable, the planner falls back to the city or ZIP code and labels the result approximate. Weather data comes from the National Weather Service and Open-Meteo. Seasonal estimates are area-scale planning inputs, not guarantees.

03 · cistern scenario

Explore a useful starting capacity.

A final cistern size depends on rainfall timing, outdoor water use, overflow routing, local requirements, and site conditions. This is a transparent first planning range.

Primary storage goal

Green infrastructure design + installation

Ready for a property-specific rainwater plan?

GreenDeck can help connect roofs, cisterns, planting, drainage, and usable outdoor space into one practical design.

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  • "“We observed immediate stormwater management improvements after the implementation plan was executed precisely as outlined.”"

    -- Valued Client

  • "“Clear communication and rigorous analysis distinguished the team from prior vendors we engaged.”"

    -- Procurement Lead

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