Hear from Our Customers
You stop worrying every time rain hits. Your basement smells normal again. No more towels on the floor, no more running downstairs mid-storm to check for puddles.
The space becomes usable. Storage you can trust. A foundation you don’t think about. Your home value stays intact instead of dropping 10-25% because a buyer’s inspector found moisture issues.
Most importantly, your family isn’t breathing mold. Respiratory problems, asthma triggers, allergy flare-ups—they’re tied directly to damp basements. Fixing the water problem fixes the air problem.
Del Val Basement Waterproofing is a family-run company that’s spent over 15 years fixing basements across Montgomery County and the Delaware Valley. We’re not the biggest operation, and that’s intentional. You get experienced crews who know Franconia’s clay soil issues inside and out.
We’ve seen what happens when water sits against a foundation for years. We’ve also seen what works long-term versus what fails in three seasons. That’s why we back our work with a Lifetime Transferable Warranty—not because we have to, but because we know it’ll hold.
Franconia sits in an area where soil composition creates real pressure on foundation walls. Clay-heavy ground swells when wet, pushes against concrete, and finds every weak point. We’ve been handling that exact problem since day one.
First, we come out and assess your basement. Not a sales pitch—an actual inspection. We look at where water’s coming in, what’s causing it, and what your foundation needs. You get a clear explanation and a fair price.
If you move forward, we start with the source. Exterior waterproofing means excavating around your foundation, applying a waterproof membrane, and installing drainage systems that redirect water away from your home. Interior waterproofing involves our sub-floor pressure relief system—a more advanced approach than old French drains—plus sealants on walls where needed.
The work itself is straightforward. You can stay in your house. We protect your property, do the job, and clean up. Most projects wrap up in a few days, depending on scope. When we’re done, you’re covered by that Lifetime Transferable Warranty.
Ready to get started?
You’re getting a system designed for Pennsylvania soil conditions. That means drainage that handles hydrostatic pressure from clay-rich ground. It means sealants that work on porous concrete. It means sump pumps sized correctly for your home’s water volume.
Franconia homes—especially older ones built before the 1980s—weren’t constructed with modern waterproofing standards. Foundations crack under freeze-thaw cycles. Mortar joints deteriorate. Water finds its way in during spring thaws and summer storms. We address all of it.
Interior work includes our sub-floor pressure relief system, which manages groundwater before it becomes a problem. Exterior work includes membrane application and perimeter drainage installation. Both approaches stop water, but the right one depends on your home’s layout, your budget, and how severe the issue is. We’ll walk through both options during the inspection so you can make an informed call.
Most homeowners in Franconia spend between $4,000 and $8,000 for a complete basement waterproofing system. That range covers interior drainage systems, sump pump installation, and wall sealants. Exterior waterproofing runs higher—often $8,000 to $15,000—because it involves excavation, membrane application, and perimeter drainage.
Your actual cost depends on your basement’s size, how much water you’re dealing with, and whether you need interior work, exterior work, or both. Homes with severe foundation cracks or structural issues may need additional repairs before waterproofing, which affects the total.
We don’t give ballpark estimates over the phone because they’re usually wrong. Every foundation is different. We’d rather come out, assess your specific situation, and give you an accurate number you can actually plan around.
Clay soil. Franconia sits in an area with clay-heavy ground that doesn’t drain well. When it rains, water saturates the soil around your foundation instead of filtering through. That creates hydrostatic pressure—basically, water pushing against your basement walls looking for any crack or weak point to get through.
Older homes are especially vulnerable. Foundations built before the 1980s often lack proper waterproofing membranes or drainage systems. Combine that with freeze-thaw cycles that crack concrete over time, and you’ve got a basement that leaks every spring and during heavy summer storms.
Gutters and grading matter too. If your downspouts dump water right next to your foundation, or if your yard slopes toward your house instead of away from it, you’re making the problem worse. Fixing the basement is step one. Fixing drainage around the house is step two.
Interior drainage systems last decades if installed correctly. Our sub-floor pressure relief systems are built to handle water for the life of your home. Sump pumps need occasional maintenance—usually just cleaning and checking the float switch—but the drainage network itself doesn’t wear out.
Exterior waterproofing membranes also last 20-30 years or more, depending on soil conditions and installation quality. That’s why we use commercial-grade materials and back everything with a Lifetime Transferable Warranty. If something fails, we fix it.
The key is doing it right the first time. Cheap systems fail within a few years. Improperly installed drainage clogs or shifts. We’ve torn out plenty of bad work from other contractors. When you’re spending thousands of dollars, you want it done once, done right, and done with a guarantee that actually means something.
You can seal minor cracks and apply waterproof paint, but that’s not waterproofing—that’s a temporary patch. Real waterproofing means managing water before it reaches your walls. That requires drainage systems, sump pumps, and sometimes excavation. Most homeowners don’t have the equipment or expertise to do that correctly.
DIY waterproofing also voids any chance of a warranty. If something goes wrong—and it often does—you’re paying to fix it twice. Once for your attempt, and again for a professional to redo it properly.
Franconia’s clay soil makes this even trickier. Hydrostatic pressure doesn’t care about waterproof paint. It’ll push water through concrete until it finds a way in. The only way to handle that is with proper drainage and pressure relief systems installed by someone who knows what they’re doing.
Exterior waterproofing stops water before it touches your foundation. We excavate around the outside of your basement, apply a waterproof membrane to the walls, and install drainage systems that redirect groundwater away from your home. It’s the most thorough approach, but it’s also more expensive and disruptive.
Interior waterproofing manages water that’s already making its way through your foundation. We install a sub-floor drainage system that captures water before it floods your basement, then pump it out through a sump pump. We also seal walls from the inside to reduce moisture penetration. It’s less invasive and more budget-friendly.
Which one you need depends on your situation. Severe foundation issues or high water tables usually require exterior work. Minor seepage or seasonal dampness can often be handled with interior systems. We’ll assess your basement and recommend the approach that actually solves your problem without overselling you on work you don’t need.
Yes, because mold needs moisture to grow. If your basement stays dry, mold doesn’t have what it needs to survive. Waterproofing eliminates the damp conditions that let mold and mildew take hold in the first place.
Mold starts growing within 24-48 hours of water intrusion. If your basement floods regularly or stays humid, you’ve likely already got mold behind walls, under carpet, or in corners you can’t see. That’s a health problem—respiratory issues, asthma, allergies—especially for kids and anyone with existing conditions.
Waterproofing won’t remove mold that’s already there. You’ll need remediation for that. But once your basement is dry and stays dry, new mold won’t grow. The air quality improves. The musty smell disappears. Your home becomes healthier to live in.
Local Resources
Useful Links
Other Services we provide in Franconia
