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Drainage Services

Damp Basements and Crawl Spaces are Hazardous to Your Health

Proper lot drainage is the first step in keeping surface water away from your home. It is much easier to achieve this goal during the building process. Once the driveway, sidewalks, irrigation systems and landscaping have been installed, moving the water away becomes more difficult, but it can still be done.

While ground water is a factor, surface water causes most problems in basements and crawl spaces. The water running off of your roof is usually the main contributor. One inch of rainwater onto 1,000 sq./ft. of roof translates to approximately 600 gallons of water. Redirecting water from your downspouts away from your foundation is extremely important. 

The soil adjacent to the foundation walls should slope away from the house at least 6" in elevation at a minimum distance of 6'. This allows water to properly drain before it reaches your foundation.

Exterior French Drains

The most common water drainage solution for a crawl space is an exterior French drain around the perimeter foundation walls and pier lines. This type of drain catches the water as it enters through the foundation wall. The drain collects the water and routes it to a gravity fed positive drain or a sump pump collection system, depending on the surface elevation around the house.

Interior French Drains

Interior French Drains are the most effective solution to interior moisture and standing water within your crawl space. This drain allows water to infiltrate the perimeter foundation walls, hit the drain, and then terminate immediately. This all occurs beneath your vapor barrier and/or encapsulation.

If you suspect you have a water control problem, contact T.H.E. Construction for a free inspection and estimate!

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