How a crawl space drain system works
A drain system gives water a planned path out. Drain pipes are placed where water collects, often along the foundation or through low areas, and carry it to a discharge point or a sump basin where a pump can move it away from the house.
The right layout depends on how your crawl space is shaped, where the water comes in and where it can be discharged. That's why we look before we quote.
- Inspect where water enters and pools
- Place drain pipes in the problem areas
- Connect to a discharge point or sump basin when needed
- Cover with a vapor barrier
Why drainage matters in Southwest Washington
Our rain comes in a long wet season rather than a few storms. Longview averages about 48 inches of precipitation a year, and Battle Ground more than 52. In a crawl space that takes on water, that means months of saturated soil. A drain system keeps that water moving out instead of sitting under your home, protecting your insulation, framing and everything above it.
