Hear from Our Customers
No more middle-of-the-night trips downstairs with a shop-vac. No more musty smell creeping up through the house. No more wondering if the next storm is going to flood your finished basement or ruin everything you’ve stored down there.
You get a basement that stays dry during heavy rain. The kind of dry where you stop checking the weather forecast every time clouds roll in.
Our Sub Floor Pressure Relief System handles what older French drains can’t—it manages hydrostatic pressure before water even reaches your foundation walls. Structural engineers recommend it because it works. You’ll have a lifetime transferable warranty backing the work, which means if you ever sell, that protection goes with the house. Most importantly, you’ll sleep through storms again without worrying about what’s happening below you.
Del Val Basement Waterproofing is a family-run waterproofing contractor serving homeowners throughout West Goshen, PA and the greater Philadelphia area. We’ve spent over 15 years learning how Chester County’s clay soil and seasonal weather patterns affect your foundation.
We’re not the biggest company in the area, and we’re not trying to be. What we are is honest about what your basement needs and what it doesn’t. We don’t push unnecessary services, and we don’t disappear after the check clears.
West Goshen homes deal with specific drainage challenges—heavy spring rains, soil that doesn’t drain well, and older foundations that weren’t built with modern waterproofing methods. We’ve seen it all, and we know how to fix it right the first time.
First, we come out for a free inspection. We’re looking at where water’s getting in, what’s causing the pressure against your foundation, and whether you’ve got any structural issues we need to address first. You get a detailed report of what we find—no guessing, no vague estimates.
Once you approve the plan, we schedule the installation. Most residential waterproofing jobs in West Goshen take two to four days depending on the size of your basement and the extent of the work. We install the Sub Floor Pressure Relief System along your foundation’s interior perimeter, which intercepts water before it can pool or seep through cracks.
We also set up a sump pump system that automatically removes collected water, even during power outages if you opt for battery backup. The whole time we’re working, you can stay in your house—we keep the disruption minimal and clean up thoroughly when we’re done. After installation, we test everything to make sure water’s being directed exactly where it needs to go. Then you get your lifetime warranty documentation, and we’re available if you ever have questions down the road.
Ready to get started?
You’re getting a complete waterproofing system, not just a patch job. That means interior drainage that manages hydrostatic pressure, a sump pump that runs reliably for years, and proper grading of your basement floor so water flows where it should.
We also handle foundation crack repair using methods that actually seal the cracks from further water intrusion—not just cosmetic fixes that fail in six months. If your crawl space is contributing to moisture problems, we’ll encapsulate it with vapor barriers that stop ground moisture from entering your home.
West Goshen’s climate means your basement deals with humidity even when it’s not flooding. We address that with dehumidification solutions that keep moisture levels where they should be—below 60% to prevent mold growth. Mold can start growing in 24 to 48 hours when conditions are right, so controlling humidity isn’t optional if you want to protect your family’s health.
Every system we install comes with that lifetime transferable warranty. If something goes wrong with our work, we fix it. If you sell your house, the new owners get the same protection. That’s how confident we are in what we install.
Most basement waterproofing projects in West Goshen run between $3,000 and $10,000. The range depends on your basement’s size, how much water intrusion you’re dealing with, and whether you need foundation repairs before we can waterproof effectively.
A straightforward interior drainage system with a sump pump for an average-sized basement typically falls in the $4,000 to $6,000 range. If you’ve got foundation cracks that need sealing, exterior drainage work, or crawl space encapsulation, the cost goes up from there.
We give you an exact price after the free inspection—no ballpark estimates or surprise charges later. You’ll know what you’re paying for and why each part of the system matters. The investment protects your home’s value and prevents the much higher costs of repeated flooding damage, mold remediation, and structural repairs down the line.
Interior waterproofing systems like ours are designed to last for the life of your home when properly installed. The Sub Floor Pressure Relief System doesn’t break down or deteriorate the way older French drain systems do. It’s built with materials that handle constant water exposure without failing.
Your sump pump is the one component that will eventually need replacement—most quality pumps last 7 to 10 years with regular use. We install pumps that are easy to access and replace when that time comes. Battery backup systems for power outages typically need new batteries every 3 to 5 years.
The drainage system itself, the sealed cracks, and the structural work we do won’t need maintenance or replacement. That’s why we can offer a lifetime warranty on the waterproofing work. You’re making a one-time investment that solves the problem permanently, not a temporary fix that buys you a few years.
No. You can stay in your home the entire time we’re working. We’re doing interior work in your basement, so your main living areas aren’t affected beyond some noise during installation.
Most jobs take two to four days. We show up, set up our work area, and keep everything contained to the basement. There will be some dust and noise from breaking through the concrete floor perimeter to install the drainage system, but we use dust barriers and clean up daily.
If you’ve got a finished basement, we’ll need to remove some of the finishing materials along the walls where we’re installing the system. We can often work in sections so you’re not losing access to your entire basement at once. After we’re done, you can refinish those areas—and this time you’ll know they’re protected from future water damage.
West Goshen sits in an area with heavy clay soil that doesn’t drain well. When you get significant rain, that water has nowhere to go except against your foundation. Over time, hydrostatic pressure builds up and forces water through any crack, seam, or weak point in your basement walls or floor.
Chester County also sees intense spring storms and occasional flooding from nearby waterways. If your home was built before modern waterproofing standards, your foundation probably doesn’t have adequate exterior waterproofing or proper drainage systems. Older homes in West Goshen were often built with basic tar coating on foundation walls—that breaks down after 10 to 15 years.
Gutters that dump water too close to your foundation make the problem worse. So do grading issues where your yard slopes toward the house instead of away from it. All of these factors combine to create the recurring basement flooding that’s common in this area. Once water finds a way in, it will keep coming back until you address the underlying pressure and drainage issues.
If you’re seeing water in your basement, you need waterproofing. If you’re seeing cracks in your foundation walls, bowing walls, or gaps between your walls and floor, you likely need foundation repair first, then waterproofing.
Foundation damage and water intrusion often go hand in hand. Water pressure against your foundation can cause structural movement over time. Cracks that start small get worse as water freezes and thaws in them each winter. If your foundation has shifted or settled unevenly, waterproofing alone won’t solve the problem—you have to stabilize the structure first.
During our free inspection, we assess both issues. We’ll tell you if your foundation needs repair work before we can waterproof effectively. Some companies will waterproof a damaged foundation and hope you don’t notice the underlying problem. We don’t work that way. You get an honest assessment of what needs to happen and in what order. If foundation repair is necessary, we handle that first, then install the waterproofing system that will protect your investment long-term.
Yes, but only if you control both water intrusion and humidity levels. Waterproofing stops water from flooding in during storms. A dehumidifier or proper ventilation controls the moisture that’s already in your basement air.
Mold needs moisture to grow, and it can start spreading within 24 to 48 hours when conditions are right. Your basement naturally has higher humidity than the rest of your house because it’s below grade and surrounded by soil. Add any water intrusion, and you’ve created the perfect environment for mold growth.
Once we waterproof your basement, you eliminate the flooding and seepage that creates standing water or damp walls. Pair that with keeping humidity below 60%—ideally between 30% and 50%—and mold can’t establish itself. If you already have mold growth, we can handle remediation as part of the waterproofing process. The key is addressing both the water source and the moisture levels so mold doesn’t come back after you’ve cleaned it up.
Local Resources
Useful Links
Other Services we provide in West Goshen
