Key takeaways
- Standing water softens the base and breaks down asphalt.
- A minimum slope keeps water moving off the surface.
- Catch basins and swales carry it away.
- Fix drainage when you pave or the same failures return.
What water does
Water that stands on or under pavement weakens the stone base and the soil, causing sinking, cracking and potholes. It also speeds up freeze-thaw damage and washes out edges.
How drainage works
Pavement should slope enough for water to leave, often one to two percent or more, toward inlets, swales or the street. Catch basins, trench drains and pipe carry flow away. Gutters and downspouts should discharge away from pavement.
What to do about ponding
Mark where water sits after rain, then ask a contractor to check grades and inlets. Regrading, adding an inlet or correcting a downspout is often far cheaper than repeated repairs.
Related services
Quick answers
How much slope does pavement need?
Commonly at least one percent, and often more, depending on the surface and use. We check slopes on site.
Do I need a permit to change drainage?
Larger or off-site changes may need approval from your city or county. We check the requirements.
Ready to talk it through? Get a free estimate or call 615-209-7643.