Rainplanter · Ireland

Free rainwater planter calculator

Size a planter for rainwater from your roof using Irish rainfall data. Start with your project location, roof area, downpipes and drainage arrangement, then adjust the planter dimensions and compare the storage provided with the storage required.

Sizing is free. An optional €10 drawing and calculation pack includes plan, elevation and section drawings, storage details, materials quantities and the design basis. It is a concept-stage aid for your project and planning application, subject to site checks and the relevant authority’s requirements.

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