Hear from Our Customers
You’re not dealing with water in your basement after rain anymore. No more musty smell when you walk downstairs. No more moving boxes to higher shelves before a storm hits.
Your heating bill drops because moisture isn’t making your HVAC work overtime. That damp chill in winter? Gone. Your belongings stay safe, your air stays clean, and you stop wondering if mold is growing behind your walls.
When you sell, you’re not scrambling to disclose water problems on Pennsylvania’s required property disclosure statement. You’re showing buyers a dry, functional space that adds value instead of raising red flags. That’s what proper waterproofing does—it removes the problem so you can move on with your life.
Del Val Basement Waterproofing is a family-run waterproofing contractor serving Willow Grove, PA and the surrounding Philadelphia area. We’ve spent over 15 years dealing with Pennsylvania’s clay-heavy soil, freeze-thaw cycles, and the older homes that make this region a hotspot for basement water intrusion.
We’re not the cheapest option, and that’s intentional. You’re paying for systems that last decades, not temporary patches that fail after the next heavy rain. Our work comes with a lifetime transferable warranty because we know what we install actually works.
Willow Grove homeowners deal with real water problems—spring flooding, summer storms, aging foundations. We’ve seen it all, and we know how to fix it the right way the first time.
First, we come out and inspect your basement for free. We’re looking at where water’s getting in, what’s causing it, and what’s going to stop it for good. You get a clear explanation of the problem—not a sales pitch.
Then we give you options. Interior waterproofing with drainage systems and sump pumps is usually the most cost-effective route. Exterior waterproofing involves excavating around your foundation and applying a waterproof membrane—it’s more thorough but costs more. We’ll tell you what makes sense for your situation and your budget.
Once you approve the plan, we get to work. Most jobs take a few days. You can stay in your house—there’s some noise and dust, but it’s not a full renovation. We install the system, test it, clean up, and walk you through what we did. Then you’re covered by our lifetime warranty, and you’re done worrying about water.
Ready to get started?
We handle interior drainage systems, sump pump installation, foundation crack repair, and exterior waterproofing with membranes and improved drainage. If you’ve got water coming through your walls, pooling on your floor, or seeping through cracks, we’ve got a fix for it.
In Willow Grove and the surrounding Montgomery County area, we see a lot of homes built 40, 50, even 100 years ago. Foundations settle. Soil shifts. Drainage systems that worked decades ago don’t cut it anymore. We customize every solution to your home’s specific needs because cookie-cutter approaches don’t work here.
We also install Sub Floor Pressure Relief Systems—these are recommended by structural engineers and are a more robust alternative to outdated French drains. They handle hydrostatic pressure better, which is critical in areas with Pennsylvania’s heavy seasonal rainfall and clay soil. You’re not getting a generic fix. You’re getting a system designed for the conditions your home actually faces.
Most residential waterproofing projects in Willow Grove run between $3,000 and $10,000, depending on the scope. Interior drainage systems with a sump pump are usually on the lower end. Full exterior waterproofing with excavation and membrane application costs more.
The price depends on how much water you’re dealing with, the size of your basement, and what’s causing the problem. If you’ve got multiple cracks, poor drainage, and hydrostatic pressure, you’ll need a more comprehensive system. If it’s a single crack or a small seepage issue, the fix is simpler and cheaper.
We give you a free estimate with a clear breakdown of what you’re paying for. No surprise charges. You’ll know exactly what the job costs before we start, and you’ll understand why each part of the system matters.
Interior drainage systems are designed to last for decades without needing maintenance. Sump pumps should be checked periodically, but the drainage system itself doesn’t wear out. Exterior waterproofing with a quality membrane typically lasts 20 to 30 years or more.
The key is doing it right the first time. DIY sealants and cheap fixes fail because they don’t address the root cause—they just cover symptoms. Professional systems manage water at the source, redirect it away from your foundation, and relieve pressure that causes cracks and leaks.
That’s why we back our work with a lifetime transferable warranty. If something goes wrong, we fix it. But when the system is installed correctly using professional-grade materials, you shouldn’t have issues. Most of our customers never call us again after the install—and that’s the point.
Pennsylvania’s clay-heavy soil doesn’t absorb water well, so when it rains hard, water pools around your foundation instead of draining away. Add in freeze-thaw cycles that create cracks, and you’ve got a perfect setup for water intrusion.
Older homes in Willow Grove often have outdated or nonexistent drainage systems. Gutters overflow, downspouts dump water right next to the foundation, and grading slopes toward the house instead of away from it. Hydrostatic pressure builds up in the soil and pushes water through any weak point—cracks, joints, porous concrete.
The fix isn’t just sealing cracks. You need a system that manages water before it reaches your foundation and redirects it if it does. That’s what interior drainage systems and exterior waterproofing do—they handle the water so your basement doesn’t have to.
You can try, but DIY waterproofing usually doesn’t work long-term. Consumer-grade sealants and paints address surface symptoms, not the actual problem. Water finds another way in, and you’re back where you started after the next storm.
Professional waterproofing contractors in Willow Grove use commercial-grade materials and systems designed for Pennsylvania’s soil and climate. We’re not just painting over cracks—we’re installing drainage systems, relieving hydrostatic pressure, and redirecting water away from your foundation. That requires excavation, proper grading, sump pump installation, and knowledge of how water moves through soil and concrete.
The risk with DIY is that you waste money on temporary fixes and still end up hiring a professional later. By then, the damage might be worse. If you’ve got recurring water problems or basement moisture problems that won’t go away, it’s worth getting a free inspection to see what’s actually going on.
Yes. Mold grows in damp environments, and that musty smell means moisture is present even if you don’t see standing water. Once you stop water from getting in, humidity drops, and mold can’t thrive.
Waterproofing doesn’t remove existing mold—you’ll need to clean that separately or hire a remediation company if it’s extensive. But it prevents new mold from growing by eliminating the moisture source. You’ll notice the air feels different within a few weeks. The damp chill goes away, and that earthy basement smell disappears.
This matters for your health, especially if anyone in your house has asthma or allergies. It also matters when you sell. Buyers notice mold and moisture issues immediately, and Pennsylvania law requires you to disclose them. A dry basement with no mold is a selling point, not a liability.
Yes. We come out, inspect your basement, explain what’s causing the water problem, and give you a detailed estimate at no cost. You’ll know what needs to be done, why it needs to be done, and what it’s going to cost before you commit to anything.
We’re not here to upsell you on services you don’t need. If a simple fix will work, we’ll tell you. If you need a full system, we’ll explain why and show you what that looks like. Our goal is to give you enough information to make a smart decision.
Call us at (610) 956-9569 or reach out through our website. We’ll schedule a time that works for you, and you’ll have answers within a few days.
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