Hear from Our Customers
You stop worrying every time rain’s in the forecast. Your basement doesn’t smell like mildew anymore, and you’re not running a dehumidifier 24/7 just to keep up.
Storage boxes stay dry. Laundry rooms stay usable. If you’ve got a finished basement, it actually stays finished—no ripping out drywall every few years because water found its way in again.
Your home’s structure isn’t slowly deteriorating from constant moisture. Mold isn’t spreading through your HVAC system. And if you ever sell, you’re not explaining away water stains or handing over disclaimers about “minor seepage issues.” You’ve got documentation, a transferable warranty, and a system that actually works.
That’s what proper basement waterproofing in West Chester, PA gets you. Not a temporary fix. A solution that holds up.
Del Val Basement Waterproofing is a family-run basement waterproofing company serving Chester County and the surrounding Delaware Valley. We’ve installed thousands of systems, and structural engineers recommend our work.
West Chester’s clay soil expands when it’s wet and contracts when it’s dry. Add in freeze-thaw cycles every winter, and you’ve got constant pressure on foundation walls. We’ve seen what fails here and what doesn’t.
Our systems come with a lifetime transferable warranty because we’re not installing something that’ll need replacing in ten years. You’re dealing with people who live and work in the same area you do—and we’re not going anywhere.
First, we come out and inspect your basement. We’re looking at where water’s coming in, what your foundation walls look like, how your grading and drainage are set up, and what’s happening with your soil. You get a written assessment and a clear explanation of what’s going on.
Then we design a system that fits your specific situation. Most of the time, that means installing a sub-floor pressure relief system—basically a perimeter drain inside your basement that intercepts water before it ever makes it through your foundation wall. We tie that into a sump pump system that moves water out and away from your house.
If you need exterior waterproofing, we excavate around your foundation, apply a waterproof membrane, install drainage, and backfill properly. For basement wall waterproofing in West Chester, PA, we may also address cracks, install vapor barriers, or upgrade your existing sump pump if it’s undersized.
The work usually takes a few days depending on the scope. You can stay in your house while we’re working. When we’re done, you’ve got a system that’s designed to last as long as you own the home—and the warranty to back that up.
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A proper basement waterproofing solution in West Chester, PA isn’t just sealing a crack or running a dehumidifier. It’s a system that manages water before it becomes a problem.
Interior waterproofing typically includes a sub-floor drainage system installed along the perimeter of your basement, a sump pump (or upgrading your existing one), and proper discharge lines that move water away from your foundation. We’re not relying on old French drains that clog with silt. This is a modern pressure relief system that handles West Chester’s heavy clay soil and high water tables.
Exterior waterproofing means excavating around your foundation, cleaning and prepping the walls, applying a waterproof membrane, installing perimeter drains, and backfilling with proper drainage material. It’s more invasive, but sometimes it’s the right move—especially if you’ve got foundation cracks or exterior wall issues that need addressing.
We also handle crawl space waterproofing, foundation crack repair, and full inspections. Every system gets a lifetime transferable warranty. You’re not paying for a Band-Aid. You’re paying for a basement waterproofing company in West Chester, PA that knows how to stop water for good.
Most homeowners in West Chester, PA spend between $3,000 and $10,000 on basement waterproofing, depending on the size of the basement, the severity of the water problem, and whether you need interior or exterior work.
Interior systems with a sub-floor drain and sump pump installation tend to fall on the lower end. Exterior excavation and waterproofing costs more because of the labor and materials involved. If you’ve got foundation cracks, grading issues, or need crawl space work done at the same time, that’ll affect the price too.
We give free estimates and explain exactly what you’re paying for. No surprises, no upselling systems you don’t need. You’ll know the cost upfront, and you’ll know what’s covered under warranty.
A properly installed basement waterproofing system should last the life of your home. That’s why we back our work with a lifetime transferable warranty.
The sub-floor pressure relief systems we install are built to handle decades of water pressure and drainage without clogging or failing. Sump pumps are the one component that may need replacing eventually—they’re mechanical, and they work hard. But the drainage system itself, the membranes, the discharge lines—that’s all designed to be permanent.
Compare that to older French drain systems or DIY sealants that might buy you a few years at best. You’re not doing this twice. You’re doing it once, and you’re done.
Yes, and in most cases, interior basement waterproofing in West Chester, PA is the most effective and least disruptive option.
Interior systems work by managing water after it’s passed through your foundation wall but before it ever makes it onto your basement floor. A sub-floor drain intercepts that water and directs it to a sump pump, which then pumps it out and away from your house. It’s reliable, it’s proven, and it doesn’t require tearing up your yard.
Exterior waterproofing is sometimes necessary if you’ve got serious foundation damage, large cracks, or structural issues that need to be addressed from the outside. But for most water intrusion problems, an interior system handles it just fine—and costs less, too.
West Chester’s clay soil is the main culprit. Clay expands when it absorbs water and contracts when it dries out, which puts constant pressure on your foundation walls. Over time, that pressure creates cracks, shifts your foundation, and forces water through any weak point it can find.
Add in freeze-thaw cycles during winter, and you’ve got even more stress on your foundation. Water seeps into cracks, freezes, expands, and makes those cracks bigger. Then spring rolls around with heavy rain, and suddenly you’ve got water pooling in your basement.
Poor grading, clogged gutters, and outdated drainage systems make it worse. If water isn’t being directed away from your foundation, it’s going to find its way in. That’s why basement foundation waterproofing in West Chester, PA isn’t optional for a lot of homes—it’s necessary.
Yes. Mold needs moisture to grow, and basement waterproofing eliminates the moisture that’s feeding it.
If you’ve already got mold, waterproofing won’t remove it—you’ll need to address that separately with proper remediation. But once your basement is dry and stays dry, mold can’t come back. No moisture means no environment for mold, mildew, or the musty smell that comes with it.
That’s not just about comfort. Mold affects your indoor air quality, triggers allergies and asthma, and spreads through your HVAC system into the rest of your house. Keeping your basement dry protects your health and your home’s air quality long-term.
Yes. Every basement waterproofing system we install comes with a lifetime transferable warranty.
That means if you sell your home, the warranty transfers to the new owner—which is a huge selling point and adds real value to your property. It also means we’re standing behind our work for as long as you own the house.
We’re not a national chain that might not be around in ten years. We’re a family-run basement waterproofing contractor in West Chester, PA, and we’ve been doing this long enough to know what holds up. The warranty isn’t a marketing gimmick. It’s a reflection of the systems we install and the way we install them.
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