Hear from Our Customers
You stop worrying every time the forecast calls for rain. Your basement stays dry through spring thaw, summer storms, and those surprise downpours that used to send you running downstairs with a mop.
The air smells clean. Your stored belongings stay safe. If you’re thinking about finishing that basement or just want to stop dealing with water damage, this is what makes it possible.
Upper Merion sits right in the path of Pennsylvania’s freeze-thaw cycle. That means your foundation takes a beating every winter, and come spring, all that melting snow has nowhere to go but toward your basement walls. A proper basement waterproofing system in Upper Merion, PA handles that pressure before it becomes your problem.
Del Val Basement Waterproofing is a family-run operation serving Upper Merion, PA and the surrounding Montgomery County area. We’ve spent over 15 years fixing wet basements in homes just like yours—older properties on the Main Line, newer builds in King of Prussia, and everything in between.
We’re not the biggest basement waterproofing company in Upper Merion, PA, and we’re fine with that. You get the experience of a crew that’s seen every foundation issue this area throws at us, without the runaround or the upsell.
Every job comes with a lifetime transferable warranty. We use a Sub Floor Pressure Relief System that structural engineers actually recommend—not the outdated French drain setup that fails after a few years.
First, we come out for a free inspection. You show us where the water’s getting in, we look at your foundation, check grading, and figure out what’s actually causing the problem. No pressure, no sales pitch—just an honest assessment.
Once you’re ready to move forward, we schedule the work around your life. Most jobs take a day or two. You can stay in your house while we’re working. We’re not tearing your basement apart—we’re installing a system designed to last as long as you own the home.
For most Upper Merion properties, that means installing an interior drainage system along the foundation perimeter, a sump pump to move water out, and sealing any cracks in your basement walls. If the issue is outside, we handle exterior basement foundation waterproofing in Upper Merion, PA too—digging down, waterproofing the exterior walls, and making sure water drains away from your foundation instead of pooling against it.
When we’re done, you’ll know exactly what we did and how the system works. Then we test it, clean up, and you’re set.
Ready to get started?
Every basement waterproofing solution in Upper Merion, PA starts with identifying where water’s coming from. Sometimes it’s through the walls. Sometimes it’s coming up through the floor. Sometimes it’s both.
We handle interior drainage systems, sump pump installation and replacement, foundation crack repair, basement wall waterproofing, crawl space waterproofing, and exterior waterproofing when needed. The goal isn’t just to stop water once—it’s to keep it out for good.
Upper Merion’s clay-heavy soil doesn’t drain well. Add in the freeze-thaw cycle and you’ve got hydrostatic pressure pushing water through any weak point in your foundation. That’s why we focus on pressure relief—giving that water somewhere to go that isn’t your basement.
You’re also getting a system that doesn’t require you to leave your home during installation, won’t destroy your yard, and comes with a warranty that transfers if you sell. Most projects run between $3,000 and $10,000 depending on the size of your basement and the extent of the issue, but we’ll give you an exact number after the inspection.
Most basement waterproofing projects in Upper Merion, PA fall between $3,000 and $10,000. The actual cost depends on the size of your basement, how severe the water issue is, and whether you need interior or exterior work.
Interior systems tend to cost less because there’s no excavation involved. Exterior basement foundation waterproofing in Upper Merion, PA costs more upfront but can be the right move if your foundation walls are already compromised or if you’re dealing with serious structural issues.
We give you a free estimate after the inspection so there’s no guessing. You’ll know exactly what the job involves and what it costs before anything starts.
No. You can stay in your house while we work. Most basement waterproofing jobs in Upper Merion, PA take one to two days, and the work is contained to your basement.
There’s some noise—we’re cutting into concrete and installing drainage systems—but it’s not the kind of disruption that forces you out. We clean up at the end of each day and make sure everything’s safe if you need to go downstairs.
If we’re doing exterior work, we’ll be digging around your foundation, but that doesn’t affect the inside of your home. You’ll still have full access to your house and your daily routine stays mostly intact.
Interior basement waterproofing systems are designed to last for decades. The drainage channels, sump pump, and sealed cracks should keep your basement dry for as long as you own the home, assuming normal wear and tear.
Exterior systems typically last around 10 years before they need maintenance or reapplication, depending on soil conditions and how much pressure your foundation is under. In Upper Merion, PA, where freeze-thaw cycles are harsh, exterior coatings can degrade faster than in milder climates.
That’s why we back our work with a lifetime transferable warranty. If something fails, we handle it. And if you sell your home, that warranty goes with it—which is a selling point buyers actually care about.
Spring is the worst time for basements in Upper Merion, PA. Snow melts, the ground is already saturated, and all that water has to go somewhere. If your foundation drainage isn’t working right, it ends up in your basement.
Pennsylvania’s freeze-thaw cycle is another major factor. Water gets into small cracks in your foundation, freezes, expands, and makes those cracks bigger. Come spring, you’ve got openings that let water pour through.
Upper Merion also has clay-heavy soil that doesn’t drain well. When it rains hard, water sits against your foundation instead of draining away. Add in aging sump pumps, clogged gutters, or poor grading around your home, and you’ve got a recipe for a wet basement every time it storms.
Yes. Foundation crack repair is part of most basement waterproofing projects in Upper Merion, PA. Cracks are one of the main ways water gets into your basement, so sealing them is essential.
We use polyurethane or epoxy injections depending on the crack. These materials are flexible, so they move with your foundation as the ground shifts—important in an area like Upper Merion where freeze-thaw movement is constant.
If the cracks are structural—meaning they’re a sign of foundation settling or failure—we’ll let you know. In those cases, you might need foundation repair before waterproofing makes sense. But for most hairline and minor cracks, sealing them as part of the basement wall waterproofing in Upper Merion, PA is straightforward and permanent.
If you’re installing an interior drainage system, yes. The sump pump is what moves the water out of your basement once the drainage channels collect it. Without a working pump, the water just sits there.
Upper Merion gets enough rain and snowmelt that relying on gravity alone isn’t enough. A sump pump gives you active protection, especially during heavy storms when water is coming in fast.
We install sump pumps with battery backup so they keep running even if you lose power during a storm—which is usually when you need them most. If you already have a sump pump, we’ll inspect it and let you know if it’s still doing its job or if it’s time for a replacement.
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