What Is a Crawl Space Drainage System?
A crawl space drainage system collects water that enters beneath your home and directs it to a sump pump. A perforated drainage pipe sits in a gravel-filled trench along the interior perimeter, with filter fabric helping keep soil and debris out.
From there, the crawl space sump pump pulls out the collected water and discharges it away from the foundation. Drainage is often combined with crawl space encapsulation to help control ground moisture and humid air.
Symptoms
Signs It’s Time for a Crawl Space Drainage Solution
Standing water, muddy or constantly wet soil, water stains on foundation walls and white, chalky efflorescence can all signal a drainage problem. Pay attention to when the water appears, too. A crawl space that gets wet again and again after heavy rain or never fully dries between storms may need a better way to capture and remove incoming water.
Other things you may notice include musty odors, damp or drooping insulation, rising indoor humidity, pest activity or floors that feel soft, springy or uneven. These signs can point to an ongoing water problem below your home.
Our Crawl Space Drainage Solutions
For standing water and ground that stays wet after every rain
Interior Perimeter Drain (Crawl Space French Drain)
An interior perimeter drain collects water where it commonly enters the crawl space—along the foundation walls and footing. Installed below the crawl space floor, the drain creates a controlled path for incoming water to reach the sump basin rather than spreading across the soil or pooling beneath your home.
For water that gathers with no way out
Crawl Space Sump Pump
A crawl space sump pump creates a way out for accumulated water. Water from the perimeter drainage system collects in a sump basin, where the pump automatically removes it and sends it through a discharge line away from the foundation. Together, the drain and sump pump create an uninterrupted path for managing water beneath your home.
For damp, uneven dirt floors
Drainage Matting
Drainage matting creates a durable layer over dirt or uneven crawl space floors and leaves space for water to move beneath the surface. Its dimpled design helps channel water toward the perimeter drainage system instead of allowing it to become trapped beneath a vapor barrier. It also gives you a more uniform surface for installing additional moisture protection.
For moisture problems that drainage alone can't solve
Vapor Barrier & Crawl Space Encapsulation
Drainage handles liquid water, but it doesn’t stop moisture from evaporating out of exposed soil or humid outside air from entering the crawl space. A vapor barrier or full crawl space encapsulation system brings that next layer of protection by separating the crawl space from moisture sources that drainage alone isn’t designed to control.
How It Works
How Legacy Supportworks Installs a Crawl Space Drainage System
Interior vs. Exterior Crawl Space Drainage: What Does Your Home Need?
Interior crawl space drainage is set along the inside perimeter to capture water that reaches the foundation and direct it to a sump pump. It’s often well suited to existing homes since installation doesn’t require excavating around the exterior.
Exterior drainage intercepts water before it reaches the foundation but typically requires excavation. Depending on the source, improving gutter drainage, grading or downspout discharge may also be necessary. Some homes benefit from both interior and exterior water management.
What To Expect
Ready to get started?
Schedule a free estimate to start your journey with Legacy Supportworks.
Schedule your inspection
Fill out our form or give us a call to book your inspection. Share what you’ve noticed so we can send the right expert to your home.
Full home
inspection
An expert will inspect the problem area and surrounding conditions, including soil movement, drainage, structural integrity, and any related concerns.
Clear explanation
of findings
We’ll walk you through what we’re seeing in easy-to-understand language so you know the root cause of the issue, not just the symptoms.
Review recommendations
If repairs are needed, we’ll outline your options, pricing, and timeline so you can make the best decision for your home.
Schedule your free inspection—
It'll only take
a minute
Meet with a trusted expert, and get
clear answers about your home.
