Roof Drainage Layout

Roof Drainage Layout shows where rainwater goes on a sloped roof, and what happens when a drain stops working.

Water is traced down the slope of each roof facet, across shared edges such as valleys, to the drain or gutter that collects it. Any area that reaches no outlet is flagged openly instead of being hidden.

WHAT YOU CAN DO
• Start from a ready-made sample roof (two facets, two gutters, downpipes, a discharge point and emergency scuppers) and adjust its corners and elevations by dragging or typing exact values
• See each outlet's catchment on a measuring-grid canvas, with area and percentage per gutter
• Review gutters, downpipes, pipe segments and discharge points with their design flow
• Build a material takeoff, add your own accessories and export it as CSV
• Back up and restore your project as a file
• Light and dark themes, phone and tablet layouts

FREE
Roof editor and catchment map, the first gutter, material takeoff with CSV export, backup and restore.

PRO (one-time purchase, no subscription)
Additional gutters and the full drainage network, emergency overflow planning with a "what if this drain is blocked" check, and professional PDF reports with your business details on the cover.

Good to know: the rainfall value in the sample project is a placeholder, not official data for your location. Results are planning aids and do not replace professional engineering judgment or local requirements.