Hear from Our Customers
You stop running downstairs every time it rains. You stop smelling that musty odor when you open the basement door. You stop worrying about mold growing behind your walls or whether your foundation is slowly cracking apart.
A properly waterproofed basement means you can actually use that space. You’re not moving boxes off the floor before every storm. You’re not dealing with shop-vacs at midnight.
Your home value stays protected. Pennsylvania law requires you to disclose water issues when you sell—so a wet basement doesn’t just cost you now, it costs you later. Waterproofing fixes that. It also cuts your heating and cooling costs because you’re not fighting humidity and temperature swings from water infiltration.
Most importantly, your family isn’t breathing in mold spores. Basement moisture fuels mold growth, and that air circulates through your entire house. Waterproofing stops it at the source.
Del Val Basement Waterproofing is a family-run basement waterproofing company serving Easttown, PA and the greater Philadelphia area. We’ve spent over 15 years fixing wet basements in homes just like yours—older properties with clay soils, freeze-thaw cycles, and drainage problems that come with this region.
We’re not the biggest company. We’re the one that shows up, does the work right, and backs it with a lifetime transferable warranty. Structural engineers recommend our systems because they work—and because we don’t cut corners to save a few bucks.
You’ll deal with people who actually answer the phone. We do free estimates, explain what’s happening with your foundation, and give you options that fit your budget. No pressure. No runaround.
First, we come out and inspect your basement. We’re looking at where water’s coming in, how your foundation is holding up, and what’s causing the problem. You get a detailed report and a free estimate—no obligation.
If you move forward, we’ll recommend either an interior or exterior system depending on your situation. Interior waterproofing is more budget-friendly and involves installing a sub-floor pressure relief system along your basement walls. It redirects water to a sump pump before it ever reaches your floor. Exterior waterproofing is more thorough—we excavate around your foundation, repair any cracks, and apply a waterproof membrane. Both methods work. It just depends on your home and your budget.
The work itself doesn’t take over your life. You can stay in your house while we’re working. Most jobs wrap up in a few days, and once we’re done, your basement is protected for good.
We test the system, clean up, and walk you through the warranty. Then you’re set.
Ready to get started?
Every basement waterproofing job in Easttown, PA is different, but here’s what most homeowners need. If you’re dealing with water coming through your walls or floor, we install a sub-floor drainage system that captures water before it floods your basement. That water gets routed to a sump pump, which kicks on automatically and pushes it outside.
If your foundation has cracks, we seal them properly—not with some DIY patch that fails in six months. Exterior jobs include excavating down to the footer, waterproofing the foundation walls, and installing drainage systems that keep water away from your home in the first place.
Easttown’s clay soils are a nightmare for foundations. They expand when wet and contract when dry, which creates constant pressure and movement. That’s why so many basements here leak. Our systems are designed specifically for this kind of soil and climate. We’ve done thousands of installs in the Philadelphia area, and we know what holds up.
You also get a lifetime transferable warranty. If you sell your house, that warranty goes with it—which is a huge selling point for buyers.
Most homeowners spend between $3,000 and $10,000 depending on the size of the basement and whether you need interior or exterior waterproofing. Interior systems run about $40 to $100 per linear foot. Exterior systems cost more—usually $100 to $200 per linear foot—because we’re excavating and waterproofing the outside of your foundation.
If your foundation needs major structural repairs or you’ve got severe drainage issues, the cost can go higher. But most jobs fall in that $3,000 to $10,000 range.
We give you a free estimate after inspecting your basement, so you’ll know exactly what you’re looking at before we start any work. No surprises.
Interior waterproofing systems are designed to last for the life of your home. Once it’s in, it’s in. There’s no maintenance beyond occasionally checking your sump pump to make sure it’s working.
Exterior waterproofing can last 10+ years depending on soil conditions and how well your drainage is maintained. The membrane itself is extremely durable, but you’ll want to keep your gutters clean and make sure water isn’t pooling near your foundation.
We back all our work with a lifetime transferable warranty, so if something goes wrong, we’ll fix it. That’s not common with our installs, but the warranty gives you peace of mind.
Yes, and for most homeowners, interior waterproofing is the smarter option. It’s less expensive, less invasive, and just as effective at keeping your basement dry.
We install a sub-floor pressure relief system along the interior perimeter of your basement. It captures water before it comes through your walls or floor and directs it to a sump pump. The pump kicks on automatically and pushes the water outside.
Interior systems work great in Easttown because the real issue isn’t always the foundation itself—it’s the hydrostatic pressure from our clay soils pushing water toward your basement. The interior system relieves that pressure and keeps you dry without tearing up your yard.
Clay soil. That’s the short answer. Easttown sits on clay-heavy soil that retains water and expands when it rains. That creates pressure against your foundation walls, and over time, that pressure forces water through cracks, joints, and porous concrete.
When the soil dries out, it contracts—which can cause your foundation to shift and create new cracks. Then the next rain comes and the cycle starts over.
Older homes make it worse because they were built before modern waterproofing standards existed. Add in clogged gutters, poor grading, and freeze-thaw cycles, and you’ve got the perfect recipe for a wet basement. Waterproofing fixes the root cause by managing that water before it ever reaches your foundation.
Yes, because mold needs moisture to grow. If your basement stays dry, mold can’t survive. Waterproofing eliminates the water source, which stops mold from coming back.
If you already have mold, we can handle remediation as part of the job. But the key is fixing the water problem first. You can scrub mold off your walls all day long—if moisture keeps getting in, it’s just going to grow back.
A dry basement also improves your indoor air quality. Basement air circulates through your whole house, so if you’ve got mold and humidity down there, you’re breathing it upstairs. Waterproofing stops that cycle and makes your home healthier.
Yes. Every basement waterproofing job we do in Easttown, PA comes with a lifetime transferable warranty. That means if you sell your house, the warranty transfers to the new owner—which is a big deal when buyers are doing their due diligence.
The warranty covers the waterproofing system itself. If water gets in after we’ve finished the job, we come back and fix it at no cost to you.
We’ve been doing this for over 15 years, and we stand behind our work. The warranty isn’t a gimmick—it’s how we do business.
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