The Roof Water Math
Let’s look at the numbers. A typical 2,000-square-foot home sheds about 1,200 gallons of water during a heavy 1-inch rainstorm. That is a massive volume of liquid.
If your downspouts dump that water right at the corner of your house—just 1 or 2 feet from the wall—you are pouring thousands of gallons of water directly into the soil supporting your foundation. You are essentially artificially flooding your own basement.
The “Recycling” Effect
We often see homeowners who claim their sump pump “never stops running.” Upon inspection, we find the culprit is outside.
- The sump pump pushes water out of the basement.
- The discharge pipe dumps it right next to the foundation.
- The water soaks down through the soil, following the path of least resistance (the backfill).
- It enters the drain tile and goes back into the sump pit.
- The pump runs again.
This burns out your pump motor and saturates the clay soil, increasing the risk of the Freeze-Thaw damage we discussed in a previous article.
The Golden Rule: 10 Feet Away
At Spartan Wall Repair, we see this every day. The single most effective DIY prevention step you can take is to extend your downspouts.
Water should be discharged at least 10 feet away from the foundation, preferably onto a downward slope. This moves the water beyond the “active zone” of the soil that presses against your walls.
Burying the Lines (The Professional Way)
Plastic splash blocks are better than nothing, but they are ugly, get moved by lawnmowers, and often crack.
The best solution is Underground Downspout Extensions.
- Materials: We use rigid PVC pipe, not the cheap corrugated black plastic that crushes and clogs with roots.
- Destination: We trench a line out into the yard to a Pop-Up Emitter (which we will cover in an upcoming article) or to the street curb where allowed.
- Result: Roof water is permanently carried far away from your “danger zone,” reducing the hydrostatic pressure on your walls significantly.
Read More:
- See what happens when this water freezes: The freeze-thaw cycle.
- Learn about the pressure build-up: Hydrostatic Pressure vs. Lateral Earth Pressure.
#Downspouts #WaterManagement #DryBasementTips #DIYHomeRepair #ColumbusLandscaping #FoundationProtection #SpartanWallRepair