Hear from Our Customers
You stop worrying every time the forecast shows rain. Your basement doesn’t smell like mildew anymore, and you’re not moving boxes off the floor or running a shop vac at midnight.
You can actually use that space. Store things without plastic bins. Finish it someday if you want. And when it’s time to sell, you won’t have buyers walking away after the inspection.
A dry basement protects your home’s value and your family’s health. Mold doesn’t just smell bad—it triggers asthma, allergies, and respiratory problems. Fixing the water problem fixes all of it.
Del Val is a family-run waterproofing company serving Uwchlan, PA and the surrounding Chester County area. We’ve spent over 15 years fixing basements in homes just like yours—older properties, clay-heavy soil, freeze-thaw cycles that crack foundations.
We know what causes water problems here because we’ve seen it hundreds of times. And we know what actually works long-term, not just what gets a crew in and out fast.
You get a lifetime transferable warranty on our work. That’s not standard in this industry, but it should be. If we’re doing the job right, we should stand behind it.
First, we come out and do a free estimate. We’re looking at where the water’s coming in, what’s causing it, and what it’ll take to fix it permanently. You’ll get a clear explanation and a fair price—no pressure, no upselling.
If you move forward, we schedule the work around your life. Most jobs let you stay in your home the whole time. We’re not tearing up your yard or knocking down walls unless it’s actually necessary.
We install systems that relieve pressure under your floor—our Sub Floor Pressure Relief System is more reliable than old-school French drains. Then we test everything, clean up, and walk you through what we did. You get documentation and your warranty paperwork before we leave.
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You’re getting a system designed for Pennsylvania’s weather. That means handling freeze-thaw cycles, clay soil that holds water like a sponge, and the heavy spring rains that flood basements across Uwchlan, PA every year.
We handle interior and exterior waterproofing, foundation crack repair, sump pump installation, and crawl space encapsulation. If there’s mold, we’ll remediate it. If your foundation has structural issues, we’ll fix those too.
Uwchlan sits in an area with a lot of older homes—many in Upper Uwchlan, East Nantmeal, and West Vincent Townships. Those homes weren’t built with modern drainage systems, and the ground here doesn’t drain well naturally. We account for all of that when we design your solution.
Most homeowners in the Uwchlan, PA area spend between $4,000 and $8,000 for a complete waterproofing system. That’s the average range across Chester County for interior drainage, sump pump installation, and vapor barriers.
Your actual cost depends on how much linear footage we’re covering, whether you need exterior work, and if there’s foundation damage we need to repair first. A small job with one wall might run $3,000. A full perimeter system with exterior waterproofing and structural repairs can go higher.
We give you a free estimate with a breakdown of what you’re paying for. No surprises, no hidden fees. And remember—fixing it right now costs a lot less than dealing with mold remediation, ruined belongings, and emergency repairs down the road.
The biggest culprit here is clay soil. Chester County has heavy clay content that doesn’t absorb water well—it holds it against your foundation instead. When we get heavy rain or snowmelt, that water has nowhere to go but down, and it finds every crack and weak point in your basement walls.
Freeze-thaw cycles make it worse. Water gets into small cracks, freezes, expands, and makes those cracks bigger. Do that every winter for 20 or 30 years, and you’ve got serious water intrusion.
Older homes in Uwchlan, PA weren’t built with modern drainage systems. No interior drains, no sump pumps, sometimes no gutters or downspouts directing water away from the foundation. Add in settling over time, and you’ve got a basement that floods every spring.
A properly installed system should last decades. Our Sub Floor Pressure Relief Systems are built to handle Pennsylvania’s conditions long-term—we’re talking 20, 30, 40 years if maintained correctly.
The key is getting it done right the first time. Cheap fixes fail fast. A system that doesn’t account for your soil type, drainage patterns, and foundation condition won’t hold up. That’s why we offer a lifetime transferable warranty—because we know our work lasts.
You’ll want to check your sump pump annually and make sure your exterior drainage is clear. But the core system—the interior drains, the waterproof barriers, the structural repairs—those don’t need replacing if they’re installed correctly from the start.
You can try, but most DIY waterproofing fails within a few years. Sealing cracks from the inside with store-bought products doesn’t address the pressure pushing water through your foundation. You’re treating the symptom, not the cause.
Real waterproofing means managing hydrostatic pressure—the force of water in the soil around your foundation. That requires interior drainage systems, proper sump pump sizing and placement, and sometimes exterior excavation to relieve pressure and redirect water.
If you’ve got a small crack and no active water intrusion, a DIY patch might buy you time. But if you’re dealing with recurring water, musty smells, or visible moisture, you need a system that actually works. Doing it wrong costs more in the long run—you’ll pay for the failed DIY attempt plus the professional fix.
Yes, but you need to remove the existing mold first. Waterproofing eliminates the moisture that mold needs to grow, but it won’t kill mold that’s already there. We handle both—mold remediation to get rid of what’s present, then waterproofing to make sure it doesn’t come back.
Mold grows when humidity stays above 60% for extended periods. A wet basement creates the perfect environment. Once you stop the water intrusion and control humidity with proper drainage and dehumidification, mold can’t survive.
This matters for your health. Mold triggers asthma, allergies, and respiratory issues—especially in kids and older adults. Fixing your basement’s moisture problem improves your home’s air quality throughout, not just downstairs. About 50% of the air you breathe upstairs comes from your basement.
We respond quickly to emergency calls, but true emergency waterproofing isn’t really a thing—you need time to install a system correctly. What we can do is assess the damage fast, help you understand what’s happening, and get you on the schedule as soon as possible.
If your basement is actively flooding right now, your first step is water removal and protecting your belongings. Once the immediate crisis is handled, we come in to fix the underlying problem so it doesn’t happen again next storm.
Most basement flooding isn’t a surprise—it’s a problem that’s been building for years. If you’re seeing early signs like dampness, musty odors, or minor seepage, don’t wait for a major flood. Getting ahead of it costs less and saves you the stress of dealing with an emergency.
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