What to do
- Look for the location and timing of overflow from a safe position.
- Ask about falls, outlets, joints and downpipes.
- Confirm whether cleaning, repair or resizing is proposed.
Put it into your brief
Record which section overflows, whether it happens in ordinary or heavy rain, and whether water reaches a wall or doorway. Photograph only from a safe position.
Make the comparison useful
Ask each provider whether cleaning, repair or a change in outlet or downpipe is proposed. The written scope should say how water flow will be checked afterwards.
Create a roof project brief