Hear from Our Customers
You’re not dealing with a damp smell anymore. You’re not running a dehumidifier 24/7 or throwing out ruined storage boxes after every storm. Your basement is dry, your air quality improves, and you stop wondering if the next rain is going to flood your foundation again.
That’s what happens when a residential waterproofing company in Cheltenham actually fixes the problem instead of covering it up. You get a system designed for Pennsylvania’s freeze-thaw cycles and soil that shifts with every season. You get a solution that handles hydrostatic pressure, not just surface water.
And you get peace of mind knowing that when Tookany Creek overflows or a heavy storm rolls through, your basement isn’t filling up while you’re at work. The water gets redirected before it ever reaches your foundation. That’s the difference between a temporary patch and a permanent fix.
Del Val Basement Waterproofing is a family-run waterproofing contractor serving Cheltenham and Montgomery County for over 15 years. We’re not a national franchise sending different crews every time. We’re local, we know Tookany Creek’s flooding patterns, and we understand how Cheltenham’s soil behaves when it gets saturated.
We’ve installed thousands of systems across the Delaware Valley, and every one comes with a lifetime transferable warranty. That means if you sell your home, the warranty goes with it—which tells you how confident we are in the work.
You’ll talk to someone who actually knows your neighborhood. You’ll get a free estimate without pressure. And when the job’s done, you’ll have a system that works the first time it rains and every time after that.
First, we come out and inspect your basement—not just the walls, but the grading, drainage, foundation cracks, and how water moves around your property. We’re looking at where the water’s coming from, not just where it’s showing up. That’s how you fix it for good.
Next, we walk you through what needs to happen. If it’s an interior system, we’re installing a Sub Floor Pressure Relief System that handles hydrostatic pressure at the source. If it’s exterior work, we’re sealing the foundation and improving drainage before water ever reaches your walls. We explain every option, what it costs, and what it actually does.
Then we do the work. Most jobs don’t take long, and you can stay in your house while it’s happening. It’s not invasive, and it doesn’t tear up your yard unless it has to. When we’re done, we test the system, clean up, and make sure you understand how it works.
After that, it’s simple. When it rains, the water gets redirected. Your basement stays dry. And if anything ever goes wrong, the lifetime warranty covers it.
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You’re getting a system designed specifically for Cheltenham’s conditions. That means accounting for Tookany Creek overflow, heavy rainfall, soil that expands and contracts, and hydrostatic pressure that builds up against your foundation during wet seasons. We don’t use one-size-fits-all solutions because your basement isn’t like every other basement.
Interior waterproofing includes our Sub Floor Pressure Relief System—recommended by structural engineers and proven across thousands of installations. It’s more reliable than outdated French drains, and it’s built to last for decades without constant maintenance. We also install sump pumps, vapor barriers, and drainage systems that keep moisture out and air quality healthy.
Exterior waterproofing means sealing your foundation, improving grading, and redirecting water before it ever touches your walls. We handle foundation cracks, install exterior drainage systems, and make sure rainwater moves away from your home instead of pooling around it. It’s the best option if you’re dealing with structural issues or if water’s getting in from multiple points.
Every job comes with a free estimate, honest pricing, and a lifetime transferable warranty. We’re not here to upsell you on services you don’t need. We’re here to fix the problem so you don’t have to deal with it again.
Most homeowners in Cheltenham spend between $3,000 and $10,000 on basement waterproofing, depending on the size of the space, the severity of the water problem, and whether you need interior or exterior work. If you’re dealing with foundation cracks, structural repairs, or extensive drainage issues, costs can go higher.
Interior systems like our Sub Floor Pressure Relief System tend to be more affordable and less invasive than exterior waterproofing. Exterior work involves excavation and sealing the foundation from the outside, which takes more labor and materials. But it’s also the most comprehensive solution if water’s coming in from multiple sources or if your foundation needs serious attention.
The best way to know what you’ll pay is to get a free estimate. We’ll inspect your basement, explain what’s causing the water intrusion, and give you a clear breakdown of what needs to happen and what it costs. No pressure, no surprises.
Yes, but only if you address the moisture problem at the source. Mold grows when there’s consistent dampness, poor ventilation, and organic material for it to feed on. If water keeps seeping into your basement, mold will keep coming back no matter how many times you clean it.
Waterproofing eliminates the moisture that mold needs to survive. Once your basement stays dry, mold can’t establish itself. If you already have mold growth, we also offer certified mold inspection and remediation services to safely remove it and restore healthy air quality.
Cheltenham’s high rainfall and Tookany Creek flooding make basements especially vulnerable to mold. If you’re smelling that musty odor or seeing dark spots on walls, it’s not just a cosmetic issue—it’s a health risk. Waterproofing fixes the root cause so you’re not dealing with recurring mold problems or respiratory issues down the road.
Interior waterproofing systems like ours are designed to last for decades—often the life of your home—with little to no maintenance. The Sub Floor Pressure Relief System we install doesn’t rely on parts that wear out quickly, and it’s built to handle Pennsylvania’s freeze-thaw cycles and shifting soil without failing.
Exterior waterproofing can last 10 years or more, but it may need periodic maintenance depending on soil conditions, drainage changes, and how much water your property deals with. Exterior systems are more exposed to the elements, so they require more upkeep than interior solutions.
That’s why we back every job with a lifetime transferable warranty. If something goes wrong, we fix it. You’re not paying for the same repair twice, and if you sell your home, the new owner gets the same protection. That’s how confident we are in the systems we install.
Yes. Basement waterproofing is a non-invasive process, and most homeowners continue living in their house while we work. You don’t need to move out, and your daily routine won’t be majorly disrupted.
Interior waterproofing happens inside your basement, so we’re not tearing up your yard or blocking your driveway. Exterior work involves some excavation around your foundation, but we keep the work area contained and clean up thoroughly when we’re done. Either way, you’re not dealing with weeks of construction or major upheaval.
The timeline depends on the scope of the job. Most projects take a few days, and we’ll give you a clear schedule upfront so you know what to expect. We work efficiently, we respect your space, and we make sure everything’s back to normal as quickly as possible.
Cheltenham has a long history of flooding, especially near Tookany Creek, and urbanization has increased stormwater runoff while reducing the creek’s capacity to handle heavy rain. When Tookany overflows, water fills basements fast—often before homeowners even realize there’s a problem.
But creek flooding isn’t the only issue. Cheltenham gets more rain than many other areas, and Pennsylvania’s soil expands and contracts with moisture and temperature changes. That creates hydrostatic pressure against your foundation, forcing water through cracks, joints, and porous concrete. Add in clogged gutters, poor grading, and aging foundations, and you’ve got a perfect storm for water intrusion.
The good news is that all of these problems are fixable. Proper waterproofing addresses hydrostatic pressure, redirects surface water, seals foundation cracks, and improves drainage so water moves away from your home instead of into it. That’s how you stop flooding for good instead of just reacting every time it rains.
Because most DIY waterproofing attempts don’t address the actual problem—they just cover it up temporarily. Painting over damp walls with “waterproof” paint might look better for a few months, but it doesn’t stop hydrostatic pressure or fix drainage issues. Eventually, the paint bubbles, peels, and fails, and you’re back where you started.
A professional waterproofing company in Cheltenham knows how to diagnose the root cause of water intrusion, not just treat the symptoms. We understand how local soil behaves, how Tookany Creek affects drainage, and what systems actually work long-term in this area. We’re not guessing—we’re using proven methods backed by structural engineers and thousands of successful installations.
You also get a lifetime transferable warranty, which means if something goes wrong, we fix it at no cost to you. DIY repairs don’t come with that kind of protection. If you want a basement that stays dry for decades, not just until the next storm, hiring a professional is the smarter investment.
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