Match the Drainage System to the Water Source, Not the Other Way Around

The water source determines the system. If water enters the crawl during dry weather and pushes through wall-floor joints, the source is groundwater and you need interior drainage. If water enters only after rain events and shows debris staining, the source is surface water and you need an exterior french drain. If both happen, you need a combination system. Epp Foundation Repair runs the diagnostic during the on-site inspection. No charge, and recommends only what the source warrants.

Interior crawl space drainage runs $3,000 to $8,000. Exterior french drains run $30 to $80 per linear foot, typically $1,500 to $8,000 for a residential job depending on length. Combination systems run $5,000 to $15,000. Price differences come from linear footage, excavation access (loess vs. Glacial till vs. Cobbly fill), discharge distance, and crawl clearance. Written estimate after on-site inspection reflects your scope.

Epp Foundation Repair warranties the drainage components. Pipe, matting, gravel installation, sump pit. For the life of the structure. Pumps carry a 5-year Epp warranty on top of the manufacturer warranty. Exterior french drain components carry the same lifetime warranty on the pipe and gravel system. BBB A+ rating since accreditation and BBB Integrity Award winner in 2011 and 2016. Warranties transfer with the home at no fee.

Crawl space water saturates wood members above; mold typically appears within 60 to 120 days of seasonal high humidity exposure. Wood rot and joist sag take 4 to 8 years. Pricing on the drainage repair itself does not change much year to year, but the secondary repair scope expands fast. A $5,000 drainage job today turns into a $5,000 drainage job plus a $15,000 floor system repair in 5 years if the moisture exposure continues. Epp Foundation Repair has seen this sequence dozens of times across NE, IA, KS, and MO.

No. Epp Foundation Repair installs the drainage system and exterior french drains. Yard regrading above the drain path, gutter cleaning, gutter replacement, and downspout extensions beyond 8 feet go to landscape and gutter contractors. On most jobs Epp Foundation Repair will note exterior issues during the diagnostic. Fixing those first sometimes reduces the drainage scope and saves money.

Possible but rarely advisable. The trench must be sloped consistently (1/8 inch per foot minimum), the pipe must be set perforation-down with the right gravel envelope, the discharge must meet local code (no discharge to neighbor's property, no discharge into sanitary sewer), and the backfill must support landscaping without collapsing the drain. Most DIY french drains in the region fail within 3 to 7 years from incorrect slope, silt infiltration, or collapsed trench walls. Epp Foundation Repair has rebuilt many of them.

Let's take the first step toward a healthy home.

A local specialist will inspect your foundation, walk you through the findings, and send a clear estimate. no cost, no pressure.