Drainage tool

Runoff pressure checker

Useful for the jobs that are not really “just a new surface” because the water path is already wrong before anyone starts quoting finishes.

high runoff pressure

This frontage has strong runoff pressure and should be treated as a drainage-first job.

  • Runoff is not being sent into a permeable area, so standing water pressure is more likely.
  • This is a non-permeable surface, so water has fewer ways to escape naturally.
  • Poor fall usually increases pooling and pushes more water toward weak edges.
  • Heavy shade can slow drying and make wet patches linger for longer.

What to do next

  • Budget for a proper channel drain, soakaway or other drainage path before final surfacing.
  • Consider a more permeable build-up or surface if the current layout is trapping water.
What to do with this result

If this comes back high, treat the driveway as a drainage-first job and re-check the runoff route before you spend money on the finish.