Attenuation Storage Volume Sizer

A ballpark required-storage estimate to scope a scheme — not a drainage design.

Impermeable area (roof + paving, m²) Design storm depth (mm) — typical UK 1% AEP + climate allowance Site / discharge context

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indicative required attenuation storage (m³)

StormCrate modules @ 95% void (~0.5 m³)—

Container loads (40HQ = 330 m³)—

Turn this into a costed spec and quote →

Ballpark only, not a design method. Formal sizing must follow FEH rainfall data, your LLFA-permitted discharge rate, soil infiltration and climate-change allowances under CIRIA C753 / the Defra 2025 SuDS standards. Our engineers will size it properly against your drawings.