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Language: en-GB

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soakaway-calculator-1
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SoakMonkey opens — the free soakaway calculator, working to BRE Digest 365.

soakaway-calculator-2
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The “Example” button in the toolbar is used to start from a worked example.

soakaway-calculator-3
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One tap fills a whole BRE 365 soakaway calculation: a rear extension for “Example Client”, reference EC-DEMO-SOAK.

soakaway-calculator-4
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Section 3, the percolation test: a trial pit 2.4 m long by 0.6 m wide with 1.5 m effective storage depth, and three 75%-to-25% drain times of 14, 17 and 15 minutes giving f = 2.16, 1.78 and 2.02 × 10⁻⁴ m/s. The tool adopts the lowest, f = 1.78 × 10⁻⁴ m/s, per BRE 365.

soakaway-calculator-5
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Section 2, drained area and rainfall: 42 m² of impermeable area, England & Wales, rainfall ratio r = 0.39, M5-60 = 20 mm, a 1-in-10-year return period and a 40% climate change uplift.

soakaway-calculator-6
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The result bar answers instantly: 0.54 m³ of storage required, half-empty time 11 minutes — DESIGN OK.

soakaway-calculator-7
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Section 4 dimensions the soakaway itself: modular crate, 0.54 m³, 0.29 m width.

soakaway-calculator-8
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Closing card — SoakMonkey, the free BRE 365 soakaway calculator.