Hear from Our Customers
You stop checking the forecast every time rain’s in the forecast. You stop worrying about mold spreading through your home or what that musty smell is doing to your family’s health. You actually use your basement again—for storage, for living space, for whatever you need it to be.
That’s what a properly waterproofed basement gives you. Not just a fix for right now, but a long-term solution that protects your home’s value and your family’s safety.
In Ambler, where clay-heavy soil and freeze-thaw cycles put constant pressure on foundation walls, you need more than a temporary patch. You need a system designed for Pennsylvania’s climate—one that handles heavy spring rains, humid summers, and winter snowmelt without failing. When your basement stays dry, you’re not just avoiding water damage. You’re preventing the kind of structural problems that cost tens of thousands to repair down the road.
Del Val Basement Waterproofing is a family-run waterproofing contractor serving Ambler and the greater Montgomery County area. We started in this industry because we saw too many homeowners getting sold systems they didn’t need at prices they couldn’t afford.
We do basement waterproofing, foundation repair, sump pump installation, and mold remediation. We’ve worked on hundreds of homes across Ambler—older properties with stone foundations, newer builds with drainage issues, and everything in between. Every job comes with a lifetime transferable warranty, which means if you sell your home, the protection goes with it.
You’re not getting a sales pitch from us. You’re getting an honest assessment of what’s wrong, what it’ll take to fix it, and what it’ll cost. We don’t upsell. We don’t disappear after installation. We show up, do the work right, and make sure your basement stays dry.
First, we come out and inspect your basement. We’re looking at where the water’s coming in, what’s causing it, and what kind of soil and drainage issues you’re dealing with. This isn’t a 10-minute walkthrough—we take the time to understand what’s happening below ground.
Once we know what’s going on, we explain your options. For most homes in Ambler, that means installing a Sub Floor Pressure Relief System—a proven alternative to outdated French drains that structural engineers actually recommend. We also handle sump pump installation, exterior waterproofing, and foundation crack repair depending on what your home needs.
Installation is straightforward. We don’t tear apart your entire basement or leave you with a mess. Most systems go in without disrupting your daily routine, and we clean up when we’re done. After installation, we test the system to make sure it’s working properly. Then we walk you through how it operates and what to expect going forward. You get documentation, warranty information, and a direct line to us if anything comes up.
Ready to get started?
When you hire Del Val, you’re getting a complete waterproofing system designed for your specific basement and the conditions in Ambler. That includes the installation, the equipment, and the warranty that backs it all up.
We handle interior and exterior waterproofing depending on where the water’s entering. If you’ve got foundation cracks, we repair those properly—not with a tube of caulk, but with methods that actually hold. If your sump pump is outdated or nonexistent, we install a reliable system that kicks on when it needs to. And if mold’s already taken hold, we’re certified to inspect, contain, and remediate it safely.
Ambler’s soil conditions—especially the clay-heavy ground that retains water—make basement moisture problems incredibly common. Add in the freeze-thaw cycles every winter, and you’ve got a recipe for foundation stress and water intrusion. That’s why we don’t use one-size-fits-all solutions. Your home gets a system that accounts for local soil types, drainage patterns, and the specific way water moves around your property. It’s not about selling you the most expensive option. It’s about installing what actually works for your situation and making sure it lasts.
Most homeowners in Ambler spend between $2,300 and $7,600 on basement waterproofing, with the average landing around $4,500 to $5,400. That’s slightly above the national average because of our soil conditions and climate.
What you actually pay depends on the size of your basement, how severe the water intrusion is, and what kind of system you need. A basic interior drainage system with a sump pump costs less than a full exterior waterproofing job with foundation repair. If you’ve got mold remediation or structural issues on top of the water problem, that adds to the total.
Here’s what matters more than the upfront cost: what happens if you don’t fix it. A single inch of water in a basement can cause $11,000 in damage. A foot of water can hit $29,000. And if you’re dealing with ongoing moisture that’s damaging your foundation or creating mold, you’re looking at even bigger problems down the road. Waterproofing isn’t cheap, but it’s a fraction of what you’ll pay if the problem gets worse.
Interior waterproofing manages water that’s already made it through your foundation walls. We install drainage systems along the perimeter of your basement floor that collect water and direct it to a sump pump, which then pumps it out and away from your home. It’s less invasive, more affordable, and works well for most basement moisture problems.
Exterior waterproofing stops water before it ever reaches your foundation. That means excavating around your home, applying a waterproof membrane to the outside of your foundation walls, and installing drainage systems at the footing level. It’s more comprehensive and more expensive, but it’s sometimes necessary if you’ve got serious foundation damage or hydrostatic pressure issues.
In Ambler, where clay soil retains water and puts constant pressure on basement walls, a lot of homes benefit from interior systems paired with proper grading and downspout extensions. Exterior waterproofing makes sense if your foundation walls are compromised or if interior methods won’t solve the problem. We assess your situation and recommend what actually fits your home—not what makes us the most money.
A properly installed waterproofing system should last for decades. Most interior drainage systems and sump pumps are designed to function for 20 to 30 years or more with minimal maintenance. Exterior waterproofing membranes can last even longer if they’re installed correctly.
That said, sump pumps do need occasional attention. You should test yours a few times a year and replace the pump itself every 7 to 10 years depending on how hard it’s working. The drainage system itself—the pipes and channels that collect water—doesn’t wear out as long as they’re not clogged or damaged.
We back our work with a lifetime transferable warranty, which means if something fails because of how we installed it, we fix it. That’s not common in this industry, and it’s one of the reasons homeowners in Ambler trust us. You’re not gambling on whether the system will hold up. You’re getting a guarantee that it will.
Yes, but only if you eliminate the moisture that’s feeding the mold in the first place. Mold needs water to grow, so once your basement stays consistently dry, you cut off its source. That stops new mold from forming and prevents existing mold from spreading.
If you already have mold, waterproofing alone won’t remove it. You need proper mold remediation first—containment, removal, and treatment of affected areas. We’re certified to handle that process safely, which matters because disturbing mold without the right precautions can spread spores throughout your home.
In Pennsylvania’s humid climate, mold spreads fast once it gets a foothold. It’s not just a cosmetic issue—it causes respiratory problems, triggers allergies and asthma, and damages building materials. For families with kids, older adults, or anyone with existing health issues, mold exposure is a serious risk. Waterproofing your basement and addressing mold together gives you a healthy, usable space instead of one that’s making your family sick.
You can handle small fixes like sealing minor cracks or improving your gutters and downspouts. But if you’re dealing with recurring water intrusion, foundation issues, or standing water after storms, DIY methods won’t solve the problem.
Basement waterproofing isn’t just about slapping some sealant on a wall. It requires understanding how water moves through soil, where hydrostatic pressure is building up, and how to install drainage systems that actually work long-term. In Ambler, where clay soil and freeze-thaw cycles create specific challenges, you need systems designed for local conditions—not generic fixes from a big-box store.
The bigger issue is what happens when a DIY fix fails. You’re not just back where you started—you’ve lost time, spent money on materials that didn’t work, and possibly made the problem worse. Water damage compounds fast. A small leak becomes a flooded basement. A damp wall becomes a mold problem. A foundation crack widens into a structural issue. Getting it done right the first time costs less than fixing a failed DIY attempt and the damage it caused.
If you’re seeing water in your basement after heavy rain, that’s the obvious sign. But there are earlier warnings that tell you a problem’s developing—dampness on walls or floors, musty odors, efflorescence (white chalky residue on concrete), or cracks in your foundation.
You might also notice your basement feels humid even when it’s not raining, or you’re running a dehumidifier constantly and it’s barely keeping up. Those are signs that moisture is getting in, even if you’re not seeing puddles yet. In Ambler’s climate, small moisture problems don’t stay small. They get worse every season.
The best time to waterproof is before you have a major flooding event. Once you’re dealing with standing water, mold growth, or foundation damage, the repair costs go up significantly. A free inspection tells you exactly what’s going on and whether you need a full waterproofing system or just some targeted fixes. Either way, you’ll know what you’re dealing with instead of guessing every time it rains.
Local Resources
Useful Links
Other Services we provide in Ambler
