Hear from Our Customers
You stop worrying every time rain hits the forecast. No more towels on the floor, no more musty smell creeping upstairs, no more wondering if this storm’s the one that floods your basement.
Your foundation stays structurally sound because water isn’t sitting against it, pushing through cracks, or pooling underneath. That means no bowing walls, no widening cracks, and no emergency calls to a structural engineer down the road.
The air quality in your home improves. Moisture breeds mold, and mold travels. When your foundation is properly waterproofed, you’re not breathing in what’s growing in your basement. That matters if anyone in your house deals with asthma or allergies.
Your home value holds. A wet basement is a red flag during inspections. A waterproofed foundation with a transferable lifetime warranty is a selling point.
Del Val Basement Waterproofing is a family-run company serving homeowners throughout New Hanover, PA and the surrounding Delaware Valley. We’ve spent over 15 years installing foundation waterproofing systems that actually work in this area’s soil conditions.
New Hanover sits on clay-heavy soil that retains water and expands when wet. That puts constant pressure on your foundation walls and creates the exact conditions that lead to leaks. We know this because we’ve waterproofed hundreds of basements dealing with the same problem.
You’re not getting a national franchise or a crew that’s never worked in Pennsylvania. You’re getting local expertise, transparent pricing, and a lifetime transferable warranty that we stand behind.
We start with a free inspection of your foundation. We’re looking at where water’s coming in, what’s causing it, and what condition your foundation walls and floor are in. You get a straight assessment, not a sales pitch.
From there, we recommend either interior waterproofing, exterior foundation waterproofing, or both depending on what your home needs. Interior systems work from inside your basement using our Sub Floor Pressure Relief System—it’s more reliable than old French drains and handles hydrostatic pressure better. Exterior waterproofing means excavating around your foundation, sealing the walls, and installing drainage that stops water before it ever reaches your basement.
Once you approve the plan, we schedule the work. Most jobs take a few days. You can stay in your house while we work—it’s not as disruptive as you’d think. When we’re done, we test the system, clean up, and walk you through your warranty coverage.
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Foundation wall waterproofing means sealing cracks, applying waterproof membranes, and addressing weak points where water’s getting through. We handle both poured concrete and block foundations, and we don’t just patch—we fix the root cause.
Drainage systems are critical in New Hanover, PA because of how much rain this area gets and how poorly clay soil drains. We install interior drainage channels that collect water before it surfaces in your basement, paired with sump pumps that move it away from your foundation. For exterior work, we dig down to your footer, apply waterproof coating, and install perimeter drains that redirect groundwater.
You also get our Sub Floor Pressure Relief System if your situation calls for it. Structural engineers recommend this system because it relieves hydrostatic pressure more effectively than older methods. It’s designed to last decades without maintenance.
Every foundation waterproofing job includes a lifetime transferable warranty. That covers materials and labor. If you sell your house, the warranty transfers to the next owner—that’s a real asset during a sale.
Exterior foundation waterproofing typically lasts 20 to 30 years when it’s done right. That lifespan depends on the quality of materials used, how well the drainage system is installed, and whether the soil around your foundation is graded properly.
In New Hanover, PA, clay soil can be tough on exterior waterproofing because it holds water and expands. That’s why we don’t just apply a coating and call it done. We install drainage systems that move water away from your foundation so the waterproof membrane isn’t constantly fighting hydrostatic pressure.
Interior systems like our Sub Floor Pressure Relief System are designed to last even longer—often the life of your home. They’re not exposed to soil conditions or weather, so there’s less wear over time. Most homeowners find that a combination of interior and exterior waterproofing gives them the longest-lasting protection.
Exterior foundation waterproofing stops water before it reaches your basement walls. We excavate around your foundation, seal the exterior walls with a waterproof membrane, and install drainage systems that redirect groundwater away from your home. It’s the most thorough option, but it’s also more invasive and costs more because of the excavation work.
Interior foundation waterproofing manages water after it’s entered the soil around your foundation but before it floods your basement. We install drainage channels along the perimeter of your basement floor that collect water and direct it to a sump pump. The pump then moves the water away from your house. This approach is less disruptive, costs less, and works extremely well for most homes in New Hanover, PA.
Some situations call for both. If your foundation walls are already damaged or if you’re dealing with severe water intrusion, exterior waterproofing fixes the structure while interior systems handle ongoing drainage. We’ll tell you what your home actually needs during the inspection.
Foundation waterproofing costs in New Hanover, PA typically range from $3,000 to $7,000 for interior systems and $8,000 to $15,000 for exterior work. The actual price depends on how much linear footage we’re waterproofing, the condition of your foundation, and whether you need additional drainage work.
Interior systems cost less because there’s no excavation. We’re working inside your basement, installing drainage channels and sump pumps. Exterior waterproofing costs more because we have to dig around your foundation, which means equipment, labor, and restoration of landscaping afterward.
Here’s what drives the price up: severe foundation cracks that need structural repair, poor grading around your home that needs correction, or situations where we’re waterproofing a full perimeter instead of one or two walls. We give you a detailed estimate after the inspection so you know exactly what you’re paying for. No surprises, no upselling. Just honest pricing for the work your home needs.
Yes, if it’s installed correctly. Foundation waterproofing stops basement flooding by managing water before it enters your living space. That means sealing entry points, installing drainage that collects groundwater, and using sump pumps that actively remove water from around your foundation.
New Hanover, PA gets about 40 inches of rain per year, and the clay soil here doesn’t absorb water quickly. During heavy storms, water pools around foundations and finds any crack or weak point to push through. A proper waterproofing system intercepts that water and redirects it away from your home.
The key is addressing both the water source and the drainage. If we only seal cracks but don’t install drainage, hydrostatic pressure will eventually create new cracks. If we only install a sump pump but don’t seal the foundation, water will still seep through. We handle both, which is why our systems work even during the worst storms. You should have a dry basement even when your neighbors are dealing with flooding.
You can handle minor waterproofing tasks like applying sealant to small cracks or improving gutter drainage yourself. But if you’re dealing with recurring leaks, foundation cracks wider than a quarter-inch, or water that comes in during every rainstorm, you need a professional.
Foundation waterproofing isn’t just about slapping some coating on your walls. It requires understanding soil conditions, hydrostatic pressure, drainage patterns, and how your specific foundation is failing. In New Hanover, PA, the clay soil creates unique challenges that most DIY approaches can’t solve. You might stop one leak, but water will find another way in if the underlying pressure and drainage issues aren’t fixed.
Professional waterproofing also comes with warranties. Our lifetime transferable warranty means if something fails, we fix it at no cost to you. If you waterproof it yourself and it doesn’t work, you’re paying twice—once for materials and your time, and again to have it done right. For most homeowners, hiring a professional from the start saves money and stress in the long run.
If you’re seeing water in your basement, you need waterproofing. If you’re seeing cracks, bowing walls, or uneven floors, you might need foundation repair—or both. Sometimes water damage causes structural problems, and sometimes structural problems create openings for water. They’re related but require different fixes.
Foundation repair addresses structural integrity. That means stabilizing walls, filling major cracks, reinforcing footers, or installing supports. Foundation waterproofing addresses moisture intrusion. That means sealing, drainage, and pressure relief systems.
During our free inspection, we assess both. We’ll tell you if your foundation walls need structural work before we waterproof, or if waterproofing alone will solve your problem. Most homes in New Hanover, PA with wet basements don’t have structural damage—they just have water management problems. But we check every time because fixing one without addressing the other is a waste of your money.
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