Hear from Our Customers
You shouldn’t have to check your basement every time the forecast calls for rain. That’s not normal, and it’s not something you just live with.
A dry basement means you can actually use that space. Store things without worrying about mold. Finish it someday if you want. Most importantly, it means you’re not dealing with expensive water damage repairs or health issues from mildew growing in the air your family breathes.
When your basement is properly waterproofed, you stop reacting to weather reports. The sump pump does its job. The drainage system handles runoff. And you get back to ignoring your basement the way you should be able to.
Del Val Basement Waterproofing is a family-run waterproofing contractor serving Horsham, PA and the surrounding Delaware Valley. We’ve spent over 15 years dealing with the same clay-heavy soil and drainage problems your house is dealing with right now.
We’re not the biggest company you’ll find. We’re also not the cheapest—and that’s intentional. What we are is straightforward about what your basement actually needs, and we back every job with a lifetime transferable warranty.
You won’t get a high-pressure sales pitch here. You’ll get someone who looks at your basement, explains what’s happening, and tells you how to fix it. If you’ve talked to other companies and felt like you were being oversold, you’ll notice the difference.
First, we come out and actually look at your basement. Not to give you a quote over the phone, but to see where the water’s coming from and why. Sometimes it’s hydrostatic pressure from Horsham’s clay soil. Sometimes it’s surface water that’s not being directed away from your foundation. Sometimes it’s both.
Once we know what’s going on, we’ll explain your options. Interior waterproofing is usually the most cost-effective and least disruptive—we install a sub-floor pressure relief system and sump pump without tearing up your yard. Exterior waterproofing is more thorough but involves excavation. We’ll tell you which makes sense for your situation.
The actual work is cleaner than you’d expect. Most jobs don’t disrupt your daily routine much. And when we’re done, you’re not left wondering if it worked—you’ll know the next time it rains.
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When we waterproof your basement, you’re getting a system designed specifically for Pennsylvania’s conditions. Horsham gets hit with heavy rainfall, snowmelt, and soil that doesn’t drain well. Our sub-floor pressure relief systems are recommended by structural engineers because they handle the hydrostatic pressure that outdated French drains can’t manage.
You’re also getting a lifetime transferable warranty. That’s not a gimmick—it means if you sell your house, the warranty goes with it. That adds real value when you’re ready to move.
And if mold’s already an issue, we handle remediation as part of the process. Because a dry basement that still smells like mildew isn’t actually fixed. We make sure the air quality is safe before we call the job done.
The other thing you’re getting? Honest pricing upfront. No surprises, no upselling you on systems you don’t need. Just a clear explanation of what it costs and why.
Most basement waterproofing projects in Horsham run between $3,000 and $8,000, depending on the size of your basement and what’s causing the water intrusion. Interior waterproofing with a sump pump and drainage system is usually on the lower end. Exterior waterproofing with excavation costs more but addresses the problem from outside.
The real question isn’t just cost—it’s whether you’re fixing the problem or just delaying it. Cheaper solutions that don’t address hydrostatic pressure or poor drainage will fail when Horsham gets hit with heavy rain or snowmelt. You’ll end up paying twice.
We give you a clear quote after we assess your basement. No hidden fees, no pressure to add things you don’t need. Just an honest number based on what it takes to keep your basement dry permanently.
Horsham’s clay-heavy soil is a big part of the problem. Clay doesn’t absorb water well, so when it rains or snow melts, that water has nowhere to go except against your foundation. That creates hydrostatic pressure—basically, water pushing against your basement walls and floor until it finds a way in.
Poor grading around your house makes it worse. If your yard slopes toward your foundation instead of away from it, you’re funneling water right where you don’t want it. Clogged gutters, broken downspouts, and old drainage systems that can’t keep up with Pennsylvania’s rainfall all contribute.
A lot of homes in this area were built before modern waterproofing standards. Stone and brick foundations are porous. If your house is older, it’s not a matter of if water will get in—it’s when. Fixing it means addressing both the pressure and the pathways water is using to enter your basement.
Interior waterproofing is usually the smarter choice for most Horsham homeowners. It’s less expensive, less disruptive, and it works. We install a sub-floor pressure relief system that manages hydrostatic pressure and directs water to a sump pump. You don’t have to tear up your landscaping, and the work gets done faster.
Exterior waterproofing involves excavating around your foundation, applying a waterproof membrane, and installing exterior drainage. It’s more thorough, but it’s also more expensive and invasive. It makes sense if your foundation walls are severely damaged or if you’re already doing major exterior work.
Most of the time, interior systems handle the problem just fine. They’re recommended by structural engineers, and we’ve installed thousands of them across the Delaware Valley. If your situation genuinely needs exterior work, we’ll tell you. But we’re not going to upsell you on excavation if a sump pump and drainage system will keep your basement dry.
Most interior waterproofing jobs take one to three days, depending on the size of your basement and the scope of work. If we’re installing a sump pump, drainage system, and vapor barrier, you’re usually looking at two days. Larger basements or more complex layouts take a bit longer.
Exterior waterproofing takes longer—usually a week or more—because of excavation and the time it takes for materials to cure properly. Weather can delay exterior work, especially during Horsham’s wet seasons.
The good news is that interior work doesn’t disrupt your life much. You can still live in your house, use your kitchen, and go about your routine. We keep the work area contained, and we clean up thoroughly when we’re done. You’re not dealing with a construction zone for weeks on end.
Yes, but only if the waterproofing actually keeps moisture out. Mold needs water to grow. If your basement stays dry, mold doesn’t have what it needs to survive.
That said, if you already have mold, waterproofing alone won’t remove it. You need remediation first. We handle that as part of the process—removing existing mold, treating affected areas, and making sure the air quality is safe. Then we waterproof so it doesn’t come back.
A lot of homeowners don’t realize that even small amounts of moisture can cause mold problems. You don’t need standing water. High humidity and damp walls are enough. That’s why proper waterproofing includes vapor barriers and dehumidification when necessary. You’re not just stopping leaks—you’re controlling the environment so mold can’t take hold in the first place.
Yes. Every waterproofing job we do comes with a lifetime transferable warranty. That means if the system fails, we come back and fix it at no cost to you. And if you sell your house, the warranty transfers to the new owner—which is a real selling point when you’re ready to move.
The warranty covers the waterproofing system itself: the sump pump, drainage, and any structural repairs we make. It doesn’t cover things like normal wear and tear on mechanical parts, but those are easy and inexpensive to replace if needed.
We stand behind our work because we know it holds up. We’ve been doing this in Horsham and the surrounding area for over 15 years. The systems we install are built to handle Pennsylvania’s weather and soil conditions long-term. A lifetime warranty isn’t a risk for us—it’s just backing up what we already know works.
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