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You’re not just fixing a leak. You’re getting your space back.
No more towels on the floor after heavy rain. No more musty smell that hits you at the bottom of the stairs. No more avoiding your basement because you know what’s down there. When your foundation is sealed right and water is routed away from your home, your basement becomes usable space again. Not a liability.
Oxford sits in an area where clay soil holds water like a sponge and seasonal storms don’t mess around. That combination puts constant pressure on your foundation. Over time, small cracks turn into bigger problems. Water finds its way in. Mold starts growing. Your heating bill goes up because damp air is harder to heat.
A proper waterproofing system changes that. You walk downstairs and it’s dry. You store things without worrying they’ll get ruined. You stop thinking about your basement as a problem you’ll deal with later. Because it’s handled.
Del Val is a family-run waterproofing company serving Oxford and the Delaware Valley since the late 90s. We’re not the biggest name you’ll find, but we’ve seen just about every basement problem this area can throw at a homeowner.
Oxford homes deal with specific challenges. Clay-heavy soil. Freeze-thaw cycles that crack foundations. Groundwater that doesn’t drain well. We know what works here because we’ve been doing this work in your backyard for over two decades. Our crews are trained to identify the real source of your water problem—not just patch the symptom.
We back our work with a lifetime transferable warranty. That means if you sell your home, the warranty goes with it. It’s not a gimmick. It’s how we’ve stayed in business this long.
First, we come out and inspect your basement. Not a sales pitch—an actual inspection. We look at your foundation, check for cracks, figure out where water is getting in and why. Sometimes it’s a drainage issue. Sometimes it’s hydrostatic pressure from soil. Sometimes it’s both.
Then we explain what we found and what it’ll take to fix it. We walk you through your options with real pricing, not ballpark guesses. If you need a sump pump, French drain, or full perimeter waterproofing system, we’ll tell you why and what each piece does.
Once you’re ready to move forward, we schedule the work. Most jobs get done in a day. Our crews show up, do the install, clean up, and test the system before they leave. You’ll know it works because we run water through it while we’re still there.
After that, your basement stays dry. Even during the first big rainstorm. That’s the point.
Ready to get started?
You’re getting a complete system, not a quick fix. That starts with interior or exterior waterproofing depending on what your home needs. Interior systems involve installing drainage along the basement perimeter and a sump pump to move water out. Exterior work means excavating around your foundation, sealing the walls, and installing drainage to keep water from ever reaching your basement.
If you’ve got foundation cracks, we repair those with commercial-grade sealants or carbon fiber reinforcement if there’s structural movement. Crawl space encapsulation is another option if moisture is coming up from below. We seal the space, install vapor barriers, and control humidity so mold doesn’t grow.
Oxford’s weather patterns make basement moisture a common issue. Homes built on clay soil face more pressure than homes on sandy or loamy ground. Water doesn’t drain as easily, so it sits against your foundation and pushes through any weak point it finds. That’s why a one-size-fits-all approach doesn’t work here. Your home’s age, soil type, grading, and drainage all factor into the solution.
We also handle mold inspection and remediation if water damage has already created a problem. You can’t just waterproof over mold and call it done. It has to be removed first.
Most homeowners in Oxford spend between $3,000 and $8,000 depending on the size of the basement and what’s needed to keep it dry. A basic interior drainage system with a sump pump runs on the lower end. Full perimeter waterproofing with exterior excavation and foundation sealing costs more.
The price depends on a few things. How much water are you dealing with? Is it coming through the floor, the walls, or both? Do you need a French drain, or is the problem isolated to a few cracks? How accessible is your foundation from the outside?
We don’t do ballpark estimates over the phone because every home is different. After we inspect your basement, we’ll give you an exact price with a breakdown of what you’re paying for. No surprises. No upselling. Just honest pricing based on what your home actually needs.
Oxford sits in an area with clay-heavy soil, and clay doesn’t drain well. When it rains, water saturates the ground around your foundation and has nowhere to go. That creates hydrostatic pressure—basically, water pushing against your basement walls and floor until it finds a crack or weak seam to seep through.
Older homes are more vulnerable because foundations settle and crack over time. Pennsylvania winters make it worse. Freeze-thaw cycles cause the ground to expand and contract, which stresses your foundation and opens up new cracks. Even newer homes can have issues if the grading around the house slopes toward the foundation instead of away from it.
Clogged gutters and downspouts also contribute. If water isn’t being directed away from your home, it pools around the foundation and eventually works its way inside. Sometimes it’s one issue. Often it’s a combination. That’s why a proper inspection matters—you need to know what’s actually causing the problem before you can fix it.
A properly installed system lasts decades. Sump pumps typically run 7 to 10 years before they need replacing, but the drainage system itself—the perimeter drains, the sealants, the vapor barriers—those last 20 to 30 years or more if installed correctly.
That’s why we offer a lifetime transferable warranty on our waterproofing work. We’re not expecting you to call us back in five years because the system failed. If it’s done right the first time, it keeps working.
The key is using quality materials and installing them to manufacturer specs. Cheap sealants crack. Poorly graded drains clog. Undersized sump pumps burn out. We use commercial-grade products and our crews are trained on proper installation. That’s the difference between a system that lasts and one that becomes another problem you have to fix.
You can handle minor surface sealing if you’ve got a small crack and no active water intrusion. But if you’re dealing with recurring leaks, standing water, or foundation issues, this isn’t a DIY job. The risk is too high and the fixes are too technical.
Waterproofing requires diagnosing the source of the water, which isn’t always obvious. Water travels along the path of least resistance, so where you see it coming in might not be where the problem actually is. Homeowners often seal the wrong area, which just redirects water to a new spot. Then you’re out the cost of materials and still dealing with a wet basement.
Professional waterproofing also involves excavation, drainage installation, sump pump setup, and sometimes foundation repair. Those aren’t things you want to get wrong. A poorly installed sump pump won’t keep up during heavy rain. Improper grading can make drainage worse. And if you don’t address the root cause, you’ll be back at square one after the next storm.
Hiring a residential waterproofing company means the job gets done right, you get a warranty, and you’re not gambling with your home’s structural integrity.
Interior waterproofing manages water that’s already made it to your basement. We install a drainage system along the perimeter of your basement floor, which collects water and directs it to a sump pump. The pump then pushes the water out and away from your home. This method works well for homes where exterior access is limited or excavation isn’t practical.
Exterior waterproofing stops water before it reaches your basement walls. We excavate around your foundation, apply a waterproof membrane or coating to the exterior walls, and install drainage tile at the footing level. This keeps water from ever contacting your foundation. It’s more invasive and costs more, but it’s also the most effective long-term solution.
Which one you need depends on your home’s layout, the severity of the water problem, and your budget. Some homes benefit from a combination of both. After we inspect your property, we’ll recommend the approach that makes the most sense for your situation. We’re not trying to upsell you on the most expensive option—we’re trying to fix the problem in a way that actually lasts.
The obvious signs are standing water, wet spots on the floor, or water stains on the walls. But moisture problems often show up in subtler ways before you see actual water. A musty smell is one of the first indicators. That’s mold or mildew growing in damp conditions.
Efflorescence is another sign—white, chalky residue on your basement walls. That’s salt deposits left behind when water evaporates. It means water is seeping through your foundation even if you’re not seeing puddles. Peeling paint, rust on metal fixtures, or warping on wooden furniture stored in the basement are also red flags.
High humidity is a problem even without visible water. If your basement feels damp or clammy, that’s excess moisture in the air. Over time, it encourages mold growth, attracts pests, and makes your HVAC system work harder. A dehumidifier helps, but it’s treating the symptom, not the cause. If you’re noticing any of these signs, it’s worth having a basement water damage repair company take a look before the problem gets worse.
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