Hear from Our Customers
You’re not dealing with that musty smell anymore. Your storage stays dry, your air quality improves, and you stop worrying every time it rains.
Your energy bills drop because your HVAC isn’t fighting moisture all year. Your foundation stops taking damage from hydrostatic pressure. And if you ever sell, you’ve got documentation and a transferable warranty that buyers actually care about.
Most importantly, you’re done throwing money at temporary fixes. No more dehumidifiers running 24/7, no more repainting walls that just bubble up again, no more wondering if this is the storm that floods your finished basement. You fix it once, the right way, and move on with your life.
Del Val Basement Waterproofing is a family-run waterproofing contractor serving Glenside, PA and Montgomery County since we started. We’ve seen what happens when foundations settle in this area’s clay soil, and we know how Pennsylvania winters crack even well-built homes.
We’re not the cheapest option you’ll find. We’re the one that shows up with a structural engineer-recommended Sub Floor Pressure Relief System instead of a French drain that’ll fail in five years. We back everything with a lifetime transferable warranty because we’re still going to be here when you need us.
You get a free inspection, a real explanation of what’s happening under your house, and a price that reflects actual solutions instead of band-aids.
First, we inspect your basement for free. We’re looking at foundation cracks, checking your grading, testing for hydrostatic pressure, and figuring out exactly where water’s getting in. You get a full report of what we find and why it’s happening.
Then we recommend a system built for your specific problem. That might be our Sub Floor Pressure Relief System if you’re dealing with groundwater pressure. It could be exterior waterproofing if your foundation walls are compromised. Or it might be drainage corrections if your gutters are dumping water right against your house.
We install everything ourselves—no subcontractors. The job takes anywhere from one day to a week depending on scope. When we’re done, you’ve got a dry basement and documentation of exactly what we did, which matters if you ever sell. And you’ve got our lifetime warranty, which transfers to the next owner if you move.
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You’re getting a customized system, not a one-size-fits-all approach. In Glenside, that matters because homes built in the 1950s have different foundation issues than new construction, and our clay-heavy soil creates pressure problems you don’t see in other parts of the state.
Interior waterproofing includes our Sub Floor Pressure Relief System, which handles the hydrostatic pressure that causes most basement flooding in this area. Exterior work addresses foundation cracks and applies membrane barriers that hold up through our freeze-thaw cycles. We install sump pumps with battery backup because losing power during a storm is exactly when you need the system working.
We also handle mold remediation if moisture’s already created problems, and we encapsulate crawl spaces that are feeding humidity into your home. Every job includes a detailed inspection report, a written estimate with no surprises, and that lifetime transferable warranty. You’re not getting a patch job—you’re getting a permanent fix that protects your home’s value and your family’s health.
Most Glenside homeowners spend between $3,000 and $10,000 depending on the size of the basement and the severity of the problem. A straightforward interior drainage system with a sump pump runs on the lower end. Full exterior waterproofing with foundation repair hits the higher end.
The variables that affect your cost: how many linear feet of foundation need work, whether you need exterior or interior solutions (or both), if there’s existing damage that needs repair first, and what kind of drainage corrections your property needs. Homes in Glenside with older foundations or poor grading typically need more extensive work.
We give you a free estimate after inspecting your basement, and we break down exactly what you’re paying for. No hidden fees, no surprise charges when we’re halfway through the job. You know the full cost before we start, and you’re making a one-time investment that lasts for the life of your home instead of paying for repairs every few years.
Hydrostatic pressure is usually the culprit. When soil around your foundation gets saturated, water pushes against your basement walls and floor looking for any crack or weak point to come through. Glenside gets 40-50 inches of rain annually, which means your foundation is dealing with that pressure regularly.
Poor drainage makes it worse. If your gutters dump water next to your foundation, or if your yard slopes toward your house instead of away from it, you’re basically directing water straight to your basement. Foundation cracks that develop over time—especially from our freeze-thaw cycles—give that water an easy entry point.
The water didn’t show up by accident, and it’s not going away on its own. The same conditions that let it in the first time are still there, which is why you keep seeing water after every major storm. Fixing it means addressing the pressure, sealing the entry points, and installing drainage that moves water away from your foundation before it becomes a problem.
A properly installed system lasts for decades—often for the life of your home. Our Sub Floor Pressure Relief Systems are designed to handle Pennsylvania’s soil conditions and weather patterns long-term, not just for a few years. That’s why we back them with a lifetime transferable warranty.
Interior drainage systems need minimal maintenance. You should check your sump pump annually and test the battery backup, but the drainage channels and waterproofing membrane don’t wear out. Exterior waterproofing membranes are built to withstand freeze-thaw cycles and stay effective for 20-30 years or more depending on the product.
Compare that to DIY solutions or cheap fixes that fail within a few years. Store-bought sealants crack. Inadequate drainage clogs. Undersized sump pumps burn out. You end up paying to fix the same problem repeatedly instead of solving it once. When you invest in professional waterproofing, you’re done dealing with it—which is the whole point.
Yes, because mold needs moisture to grow. When you eliminate the water source, you eliminate the conditions mold requires. That musty smell goes away, your air quality improves, and you’re not dealing with the respiratory issues that come from breathing mold spores.
If you already have mold, waterproofing alone won’t remove what’s there—you need remediation first. We handle that as part of the process when necessary. Once the existing mold is gone and your basement is dry, new growth stops because there’s nothing feeding it.
This matters for your family’s health. Mold triggers asthma, aggravates allergies, and causes respiratory problems, especially in kids and older adults. It also destroys whatever it grows on—drywall, insulation, stored belongings. Waterproofing protects both your health and your property by cutting off moisture at the source instead of just managing symptoms with a dehumidifier.
It depends on where the water’s coming from and what’s causing it. Interior waterproofing handles hydrostatic pressure and groundwater that’s pushing up through your basement floor or seeping through walls. Exterior waterproofing addresses foundation cracks and prevents water from reaching your walls in the first place.
Most Glenside homes benefit from interior solutions because the clay soil here creates significant pressure from below. Our Sub Floor Pressure Relief System manages that pressure and channels water away before it becomes a problem. Exterior work makes sense when you’ve got foundation damage, significant cracking, or drainage issues that need correction at the source.
During your free inspection, we’ll tell you exactly what your home needs. Some situations call for both interior and exterior work—especially if you’re dealing with an older foundation that’s developed cracks over time. We’re not trying to upsell you on services you don’t need. We’re giving you the solution that actually fixes your specific problem.
You can try, but DIY waterproofing rarely solves the underlying problem. Store-bought sealants might stop minor seepage temporarily, but they don’t address hydrostatic pressure or foundation issues. You’re covering up symptoms instead of fixing causes, which means you’ll be dealing with water again soon.
Professional waterproofing involves diagnosing exactly why water’s entering your basement, then installing systems designed to handle Pennsylvania’s specific conditions—freeze-thaw cycles, clay soil, heavy rainfall. That requires equipment, expertise, and products you can’t get at a home improvement store. It also requires understanding how foundations behave in this region.
The bigger risk is making things worse. Improper drainage installation can trap water against your foundation instead of moving it away. Wrong products can fail and cause more damage. And if you don’t address the root cause, you’re just delaying an inevitable (and now more expensive) professional fix. Most homeowners who call us have already tried DIY solutions that didn’t work—and they end up paying more in the long run.
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