Hear from Our Customers
You’re not looking for a temporary patch. You want to walk downstairs after a storm and find it dry. You want to store things in your basement without wondering if they’ll get ruined. You want to stop thinking about water damage every time it rains.
That’s what happens when the work is done right. Your basement becomes usable space again. The musty smell goes away. You stop worrying about mold making your family sick. Your foundation stays intact instead of slowly cracking under pressure from water and soil.
The value is straightforward: no more water where it doesn’t belong, no more emergency calls during storms, and no more wondering if this is the year everything floods. Just a dry basement that works the way it should.
Del Val is a family-run waterproofing contractor serving West Chester and the surrounding area. We know what happens to basements around here because we’ve seen it hundreds of times. The clay-heavy soil, the older foundations, the way water moves through Chester County properties—it’s not guesswork for us.
Every job we do comes with a lifetime transferable warranty. That’s not marketing talk. It means we stand behind the work long-term, and if you sell your house, the warranty goes with it. We’re not interested in quick fixes that fail in two years. We’re interested in solving the problem once so you don’t have to deal with it again.
First, we come out and look at your basement. Not a sales pitch—an actual inspection. We figure out where the water is coming from, why it’s getting in, and what needs to happen to stop it. Sometimes it’s a drainage issue. Sometimes it’s foundation cracks. Sometimes it’s a failing sump pump that can’t keep up anymore.
Once we know what’s wrong, we explain it to you in plain terms. No jargon. No upselling. Just the fix that makes sense for your situation. Then we give you a written estimate so you know exactly what you’re paying for.
When we do the work, we handle everything from start to finish. Exterior drainage systems, interior waterproofing, sump pump installation, foundation repair—whatever it takes to keep water out. We clean up when we’re done, and the warranty starts the day we finish.
Ready to get started?
You get a complete system designed for your property. That might mean installing exterior drainage to redirect water before it reaches your foundation. It could include interior waterproofing with a perimeter drain system. If your sump pump is old or undersized, we replace it with one that actually works when you need it.
West Chester homes deal with specific challenges. The soil here holds water, and a lot of the foundations are older. That means water pressure builds up against basement walls, and small cracks turn into bigger problems fast. We account for that when we design your system.
You also get mold remediation if moisture has already caused growth. Mold isn’t just a cosmetic issue—it affects your air quality and your family’s health. We remove it and make sure the conditions that caused it don’t come back. The goal is a basement that’s dry, safe, and usable year-round.
Most basement waterproofing projects in West Chester run between $3,000 and $8,000, but the actual cost depends on what’s causing the water intrusion and how extensive the fix needs to be. A simple interior perimeter drain system costs less than a full exterior excavation with foundation repair.
If you’re dealing with minor seepage through a few cracks, you’re looking at the lower end. If you need exterior drainage, a new sump pump system, and foundation work, the cost goes up. We don’t give ballpark numbers over the phone because every basement is different. We come out, assess the situation, and give you an exact price in writing.
The investment makes sense when you consider what water damage costs over time. Foundation repairs can run $10,000 or more if cracks get worse. Mold remediation alone can cost thousands. Waterproofing stops those problems before they start, and it can increase your property value by up to 25%.
The clay-heavy soil around West Chester is a big part of the problem. Clay doesn’t drain well, so when it rains, water sits against your foundation instead of moving away. That creates hydrostatic pressure—basically, water pushing against your basement walls until it finds a way in through cracks, joints, or porous concrete.
Older foundations are especially vulnerable. A lot of homes in this area were built decades ago, and foundation materials break down over time. Small cracks widen. Mortar joints deteriorate. The seal between your basement floor and walls weakens. Add in poor grading around your house or clogged gutters, and you’ve got a recipe for water intrusion.
Sump pumps fail too. If yours is old, undersized, or doesn’t have a battery backup, it won’t keep up during heavy storms. We’ve seen pumps cycling every minute because they can’t handle the volume. Eventually, they burn out, and your basement floods.
A properly installed waterproofing system should last the life of your home. That’s why we back our work with a lifetime transferable warranty. The materials we use—drainage systems, sump pumps, waterproof membranes—are designed for long-term performance, not just a few years of service.
The key is doing it right the first time. Cheap fixes fail because they don’t address the root cause. If you just seal cracks without fixing the drainage problem, water will find another way in. If you install a sump pump without proper discharge lines, it won’t move water far enough away from your foundation.
Maintenance matters too. Your sump pump should be tested annually to make sure it’s working. Discharge lines need to stay clear. Gutters should direct water away from your house. But the core system—the drains, the waterproofing membrane, the structural repairs—shouldn’t need replacement if it’s installed correctly.
You can handle minor surface sealing yourself, but real waterproofing requires equipment, expertise, and a warranty you won’t get from a DIY job. If you’re dealing with active water intrusion, foundation cracks, or drainage issues, hiring a waterproofing contractor in West Chester, PA is the smarter move.
Here’s why: diagnosing the problem correctly is half the battle. Water might be coming through your wall, but the actual issue could be poor exterior grading, a high water table, or a crack in your foundation footer. If you guess wrong, you waste money on a fix that doesn’t work. We have the tools to find the real source—moisture meters, inspection cameras, pressure testing equipment.
Installation matters too. Exterior drainage systems require excavation and proper slope calculations. Interior perimeter drains need to connect to a functioning sump system with the right discharge setup. Foundation repairs require hydraulic cement, epoxy injections, or carbon fiber reinforcement depending on the crack type. Get any of that wrong, and you’re back where you started—except now you’re out the money you spent trying to fix it yourself.
Exterior waterproofing stops water before it reaches your foundation. We excavate around the outside of your basement, apply a waterproof membrane to the walls, install drainage systems like French drains or catch basins, and regrade the soil to direct water away. It’s more invasive and costs more, but it’s the most effective long-term solution because it addresses the problem at the source.
Interior waterproofing manages water that’s already making its way into your basement. We install a perimeter drain system along the inside of your foundation walls, channel water to a sump pump, and pump it out and away from your house. We also seal cracks and apply waterproof coatings to walls. It’s less expensive than exterior work and doesn’t require digging up your yard, but it’s a management system rather than a prevention system.
Which one you need depends on your situation. If your foundation has significant cracks or the exterior is deteriorating, exterior waterproofing makes sense. If you’re dealing with minor seepage or want a less invasive solution, interior waterproofing works well. Sometimes the best approach is a combination of both—exterior drainage to reduce pressure and interior systems to handle any water that still gets through.
If you’re only seeing water during heavy storms and it’s pooling in one area of your basement, a sump pump upgrade might be enough. But if you’re dealing with damp walls, persistent moisture, foundation cracks, or water coming in from multiple spots, you need a complete waterproofing system that addresses the whole problem.
A sump pump is just one part of a waterproofing system. It removes water that’s already collected in your basement, but it doesn’t stop water from getting in. If your basement walls are wet, if you smell mold, or if you see efflorescence (white chalky residue on concrete), water is penetrating your foundation. A sump pump alone won’t fix that.
The best way to know what you need is to have someone look at it. We do free inspections where we evaluate your basement, check for foundation damage, test moisture levels, and figure out where the water is coming from. Then we recommend the right fix—whether that’s just a better sump pump, a drainage system, full waterproofing, or a combination. You shouldn’t have to guess about something this important.
Local Resources
Useful Links
Other Services we provide in West Chester
