Roof & Gutter Issues
Gutters overflow, downspouts can't keep up, or roof drainage needs sizing.
4 calculators recommended for this problem
Recommended Calculators
These tools are most useful for solving "roof & gutter issues" problems.
Roof Drain Sizing Calculator
Calculate roof drain size for flat and low-slope roofs. Uses IPC tables for primary drains, overflow drains, and scuppers. Free professional-grade drainage calculator.
Downspout Sizing Calculator
Calculate required downspout size based on roof area and rainfall intensity. Uses IPC tables for round and rectangular downspout sizing. Free professional-grade drainage calculator.
Gutter Flow Calculator
Calculate gutter flow capacity using Manning's equation. Analyze K-style, half-round, and box gutters. Determine flow velocity, hydraulic radius, and Froude number. Free professional-grade roof drainage calculator.
Rational Method Calculator
Calculate peak stormwater discharge using the Rational Method (Q = CiA). Free online calculator for drainage engineers and civil engineering professionals.
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