When water actually pools under the house after heavy rain, no barrier alone will fix it — you have to move the water out. Here is what crawl space drainage and a sump pump cost in the Hattiesburg area, how they work, and why the high water table in Forrest and Lamar Counties makes them so common.
A crawl space sump pump installation in the Hattiesburg area typically runs about $800 to $2,000, while a full interior drainage system varies more and is priced after an inspection. What moves the number:
Because every wet crawl space is different, an inspection sets the right system. Request a quote and tell us how often you see water.
Interior drainage — a perimeter drain set into the crawl space floor — collects water and channels it to a low point, where a sump pump sits in a basin and pumps it up and out through a discharge line away from the foundation. Together they keep water from standing on the ground, which is the step that has to happen before a vapor barrier or encapsulation can keep the space dry.
South Mississippi's high water table and heavy, sudden rainfall push groundwater and surface water into crawl spaces that sit low or lack drainage. Recurring standing water rots joists, feeds mold, and keeps humidity high no matter what else you do. Drainage and a sump pump remove the water at the source, so a dehumidifier and sealed barrier can finish the job and keep it dry.
Usually $800 to $2,000 installed; a full interior drainage system varies more and is priced after an inspection.
If water pools after rain, you need drainage and a pump first. If it is only ground moisture and humidity, a barrier and dehumidifier may be enough.
Groundwater or surface water enters faster than it drains — common with the local high water table. Drainage collects it and a pump sends it away.
For crawl spaces that flood often, a battery or secondary pump protects the home during power outages and heavy storms.
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Seals the ground once water is under control.
The full seal after drainage is in place.
Holds humidity low once the water is gone.
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