Hear from Our Customers
You stop worrying every time the forecast calls for rain. Your basement becomes usable space again, not a liability you avoid showing guests or a storage area where everything needs to be elevated on pallets.
The air in your home improves because you’re not circulating mold spores from a damp basement throughout your living space. Your foundation stops deteriorating from constant moisture exposure, which means you’re not looking at exponentially more expensive structural repairs down the road.
You can actually use your basement for what you intended—whether that’s storage, a workshop, extra living space, or just peace of mind knowing the lowest level of your home isn’t slowly rotting. And when it’s time to sell, you’re not scrambling to disclose water issues or watching buyers walk away after the inspection.
Del Val Basement Waterproofing has spent over 15 years solving water problems in homes throughout Montgomery County. We’re based in Plymouth Meeting, which means we know exactly what Perkiomen homeowners deal with—the clay-heavy soil, the proximity to Perkiomen Creek, the way water finds its way into older stone foundations after spring storms.
We’re a family-run basement waterproofing company, not a national franchise that sends different crews every time. You get the same team that understands your specific situation, and we back our work with a lifetime transferable warranty because we’re not going anywhere.
Most of our business comes from referrals, which tells you something about how we operate. We don’t pressure you into services you don’t need, and we don’t disappear after the check clears.
First, we come out and actually look at your basement—not just where you’re seeing water, but where it’s coming from and why. We’re checking your foundation walls, your floor, your grading, your drainage, the whole picture. You get a straight assessment of what’s causing the problem and what it’ll take to fix it.
Once we agree on the approach, we schedule the work around your life. Most interior basement waterproofing jobs take one to three days depending on the size and scope. You can stay in your house during the work—there’s some noise and dust, but we’re not tearing your home apart.
For interior systems, we’re typically installing a sub-floor pressure relief system along the perimeter where your floor meets the wall. This intercepts water before it enters your basement and channels it to a sump pump that pushes it away from your foundation. For exterior work, we excavate around the foundation, apply waterproof membrane, install drainage board, and ensure water never reaches your walls in the first place.
After installation, we test everything, clean up the work area, and walk you through what we did. Then we leave you with a warranty and a dry basement.
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You’re getting a system designed specifically for your home’s foundation and Perkiomen’s conditions. That means accounting for the local water table, soil composition, and how water moves around your property during Montgomery County’s heavy spring rains and winter snowmelt.
Interior basement wall waterproofing typically includes perimeter drainage channels, a commercial-grade sump pump with battery backup, and proper discharge lines that move water well away from your foundation. We’re not just collecting water—we’re eliminating it before it causes problems. For homes with significant groundwater pressure or older foundations, we often recommend our sub-floor pressure relief system, which structural engineers prefer over outdated French drains.
Exterior waterproofing means excavating around your foundation, repairing any cracks or damage, applying waterproof membrane and drainage board, and installing perimeter drains that intercept water before it ever reaches your walls. This approach lasts 20 to 30-plus years and is often the right call for homes with chronic seepage through foundation walls.
You also get our assessment of any foundation issues that need addressing—because waterproofing a compromised foundation is like putting a bandage on a broken bone. We’ll tell you if you need foundation repair before, during, or instead of waterproofing.
Most basement waterproofing projects in Perkiomen run between $3,500 and $8,000, depending on the size of your basement, the severity of the water problem, and whether you need interior or exterior work. Interior perimeter drainage systems with sump pump installation typically cost less than full exterior excavation and waterproofing.
You’re looking at the lower end if you have a small basement with minor seepage that can be handled with an interior system. You’re looking at the higher end if you need exterior waterproofing on a larger home or if there’s foundation damage that needs repair first.
We don’t give ballpark prices over the phone because every situation is different. What matters is getting the right solution for your specific problem—not the cheapest band-aid that fails in two years. We’ll come out, assess your situation, and give you an honest price for work that actually solves the problem.
Interior drainage systems last decades when properly installed and maintained. The sump pump is the only component that may need replacement every 7 to 10 years, depending on how hard it works. The drainage channels and piping last for the life of your home.
Exterior waterproofing systems last 20 to 30-plus years, sometimes longer. The membrane and drainage board we install are designed to outlast most mortgages. The key is proper installation—cutting corners on materials or technique means you’re digging everything up again in 10 years.
Our lifetime transferable warranty backs our interior systems, which means if you sell your home, the warranty goes with it. That’s not something you get from contractors who aren’t confident in their work. We’ve been doing this since 2007, and we’re still servicing systems we installed 15 years ago with zero failures.
Not if it’s done right. The whole point of basement waterproofing is to permanently solve water intrusion, not temporarily mask it. When we install a system, we’re addressing the source of the problem—whether that’s groundwater pressure, surface water drainage, or foundation cracks.
Interior systems intercept water before it enters your basement and redirect it away from your foundation. Exterior systems prevent water from ever reaching your foundation walls. Both approaches work, and the right choice depends on your specific situation.
The only time you’d see water again is if something catastrophic happens—like a sump pump failure during a power outage, which is why we include battery backup systems. Or if your home settles significantly and creates new cracks, which is rare but possible. Otherwise, once water is controlled, it stays controlled. That’s why we warranty our work for life.
Yes, and interior basement waterproofing is often the better option for Perkiomen homes. It’s less invasive, more affordable, and just as effective for most water problems. You don’t need to excavate your yard, tear up landscaping, or disrupt your property for weeks.
Interior systems work by managing water after it enters the foundation but before it enters your basement. We install perimeter drainage channels along the footer, which collect water and direct it to a sump pump. The pump then pushes water away from your foundation through discharge lines.
This approach is ideal for homes with groundwater pressure, minor seepage, or situations where exterior excavation isn’t practical—like when you have a deck, patio, or addition built against the foundation. The only time interior waterproofing isn’t enough is when you have significant foundation damage or when water is actively deteriorating your exterior walls. In those cases, exterior work is necessary to protect the structure itself.
Perkiomen’s location near Perkiomen Creek and throughout Montgomery County’s clay-heavy soil creates constant groundwater pressure against foundations. When it rains hard or snow melts quickly, that pressure intensifies and water finds any available entry point—cracks in foundation walls, the joint where floor meets wall, or straight through porous concrete block.
Older homes in Perkiomen often have stone or block foundations that weren’t built with modern waterproofing methods. These foundations absorb water like a sponge, and over time, the mortar deteriorates and creates gaps. Even newer homes can develop problems if the builder didn’t properly address drainage or if settling creates cracks.
Poor grading around your home makes everything worse. If your yard slopes toward your foundation instead of away from it, every rainstorm sends water straight to your basement. Clogged gutters, broken downspouts, and inadequate drainage systems all contribute. The water has to go somewhere, and if the path of least resistance is through your foundation, that’s where it goes.
If you’re seeing water in your basement after rain, you need waterproofing. If you’re seeing cracks wider than a quarter-inch, horizontal cracks, or bowing walls, you need foundation repair first. Often, you need both—because water causes foundation damage, and foundation damage lets in more water.
Here’s the reality: a compromised foundation won’t hold waterproofing. If your walls are actively failing, we need to stabilize them before we can keep water out. That might mean installing support beams, wall anchors, or helical piers depending on what’s happening. Once the structure is sound, then we waterproof.
We’ll tell you exactly what you need during the assessment. We’re not going to sell you foundation repair if your walls are fine, and we’re not going to waterproof a failing foundation and pretend that solves anything. You get an honest evaluation of what’s wrong and what it takes to fix it permanently—not what makes us the most money on this particular job.
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