Review drains and scuppers on a low-slope roof

Understand the condition

Water observations around a drain or scupper need a mapped review of flow paths, strainers, overflow provisions, nearby seams, and roof transitions.

Separate debris service from repairs to the membrane, outlet, flashing, or slope and preserve before-and-after drainage observations.

Define the repair decision

Create a drainage sketch showing primary outlets, overflow routes, strainers, adjacent seams, equipment supports, and observed low areas. Record water depth only when it can be done safely and note the elapsed time after rainfall. Do not infer blocked drainage from a single photograph taken during a storm.

Separate four possible scopes: debris removal, outlet or flashing repair, localized membrane work, and correction of a larger slope condition. Each proposal should identify which one it addresses and how flow will be checked afterward. Preserve pre-service and post-service observations from the same labeled locations for future comparison.

• Identify the affected assembly and transitions
• Compare proposals against one documented boundary
• Record concealed conditions before covering