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Water in your basement isn’t just an inconvenience — it’s a slow drain on your home’s value, your air quality, and your peace of mind. Once a properly installed french drain system is in place, hydrostatic pressure stops building against your foundation walls, moisture stops finding its way in, and the musty smell that’s been living in your lower level finally has a reason to leave.
For Ardmore homeowners specifically, this matters more than most people realize. The pre-WWII stone foundations common throughout North Ardmore and the surrounding blocks were never built with modern waterproofing in mind. They absorb. They shift. And every freeze-thaw cycle that runs through Montgomery County winters opens up new pathways for water to follow. A french drain intercepts that water before it ever reaches your walls.
There’s also what’s happening above ground to consider. The wave of new construction along Lancaster Avenue — Coulter Place, Cricket Flats, The Piazza at Ardmore — is adding hundreds of units and thousands of square feet of impervious surface to a community that was already dealing with aging drainage infrastructure. If your yard or basement has gotten noticeably wetter in the last few years, that’s not a coincidence. It’s a drainage problem that’s only going to get worse without a real solution in place.
We at EJS Environmental Services LLC have been working in Montgomery County and Delaware County for nearly 20 years. Ardmore sits right at the intersection of both — and that dual-county character is something most contractors don’t even think about. Permit requirements differ depending on whether your property falls under Lower Merion Township or Haverford Township, and we know both jurisdictions well enough to handle the paperwork without putting that burden on you.
What actually separates us from every other drainage contractor targeting this area isn’t just experience — it’s credentials. We hold Certified Lead Inspector and Risk Assessor designations, which means we can test for lead before breaking ground in a pre-1978 home. No competitor currently serving Ardmore can say that. We’re also EPA and HUD compliant, fully licensed, bonded, and insured at the level that environmental hazard work actually requires.
If you’ve been getting quotes from waterproofing companies and something felt off — like they weren’t asking the right questions about your home’s age or what might be behind those walls — trust that instinct. We ask those questions because we’re certified to handle whatever the answers turn up.
It starts with a free estimate and a real conversation about your property. We’ll look at where the water is coming from, how your foundation is constructed, and what the drainage conditions around your home actually look like — not just what’s visible on the surface. For homes in Ardmore’s older residential blocks, that assessment includes evaluating whether environmental testing is warranted before any excavation begins. If your home predates 1978, that’s not an optional step — it’s the responsible one.
Once the scope is clear, the installation itself follows a straightforward sequence: trench excavation at the correct depth and slope, geotextile filter fabric laid to keep soil from clogging the system, perforated PVC pipe set at the right grade, clean crushed stone backfilled around the pipe, and a properly designed outlet that directs water away from your foundation. Every component matters. A french drain installed without filter fabric or with the wrong pipe slope will fail within a few years — and you won’t know it until the water comes back.
For projects in Lower Merion Township, a Runoff and Erosion Control Permit may be required depending on the scope of work. We handle that process as part of the job. Spring tends to be the busiest window for this work in Ardmore — snowmelt plus rain hits the older foundations hard — but we run installations year-round, including interior systems when exterior access is limited in winter.
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A french drain installation through us isn’t just a trench with pipe in it. It’s a full drainage solution that accounts for your specific property, your home’s age, and the conditions your foundation is actually dealing with. For Ardmore homes — particularly the stone and brick construction common throughout the older residential blocks near Suburban Square and North Ardmore — that means the system is designed to handle what those foundations face, not what a generic installation template assumes.
We also bring something no other drainage contractor in this market offers: the ability to test for and remediate environmental hazards as part of the same engagement. If excavation near your foundation turns up lead-contaminated soil, asbestos pipe insulation, or mold behind a wall, we don’t stop work and hand you a phone number. We handle it. Testing, remediation, drainage installation, and cleanup — all under one license, one insurance policy, and one point of contact. HEPA filtration systems are used on every job where disturbing older materials is a possibility, which in Ardmore’s pre-WWII housing stock is more often than not.
French drain cleaning and maintenance services are also available for existing systems. If you have a french drain that was installed years ago and you’re not sure it’s still functioning the way it should, we can assess it. A clogged or failing drain in a high-value Ardmore home isn’t a minor issue — it’s a liability. We provide free estimates, cash discounts, and 24/7 availability so you can reach us when the problem shows up, not just during business hours.
It depends on the scope of the project and which part of Ardmore your property sits in. Ardmore spans two counties — Lower Merion Township in Montgomery County and Haverford Township in Delaware County — and each jurisdiction has its own requirements. Under Lower Merion Township’s stormwater management ordinance, a Runoff and Erosion Control Permit is required when the project involves more than 1,500 square feet of impervious surface or triggers stormwater management calculations. Excavation permits may also apply depending on the depth and location of the work.
This is one of the reasons hiring a contractor who actually knows the local regulatory environment matters. We’ve worked in both Montgomery and Delaware County for nearly 20 years and handle the permitting process as part of the job. You won’t be left trying to figure out which township office to call or whether your project crosses a threshold that requires additional documentation. That’s already accounted for before the first shovel goes in the ground.
French drain costs vary based on the type of system, the length of the drain, and what the site conditions actually look like. As a general reference point, interior french drain systems typically run in the range of $40 to $85 per linear foot, while exterior systems can range from $10 to $50 per linear foot — with most complete residential projects falling somewhere between $3,000 and $10,000 depending on complexity. In a market like Ardmore, where homes are older and site conditions can be more involved, it’s common for projects to land toward the middle or upper end of that range.
What matters more than the upfront number is what you’re actually getting for it. A properly installed french drain with quality materials — rigid perforated PVC, geotextile filter fabric, correct slope — lasts 30 to 40 years. A cut-rate installation without those components fails in three to five. For a home on the Main Line worth $600,000 or more, the cost of getting it wrong significantly outweighs the cost of getting it right the first time. We provide free estimates that break down exactly what’s included so you can evaluate the quote with full information, not just a number.
It’s not a problem, but it is something that needs to be handled carefully. Homes built in the 1930s — and there are quite a few of them in Ardmore’s older residential blocks — often have stone or brick foundations that were never designed with waterproofing in mind. They’re porous by nature, and decades of moisture exposure can mean the water intrusion you’re seeing today has been building for a long time. A french drain system designed for that type of foundation needs to account for where the water is actually entering, not just where it’s pooling.
The bigger consideration with pre-WWII homes is what else might be present during excavation. Lead-contaminated soil near the foundation is a real possibility in homes that age, as is asbestos in pipe insulation or other building materials. Standard drainage contractors aren’t equipped to identify or handle those hazards — they’ll either miss them or stop work when they find them. We hold Certified Lead Inspector and Risk Assessor credentials and can test before breaking ground. If something turns up, we handle it as part of the same project. That’s not a standard offering in this market — it’s specific to us.
An exterior french drain is installed around the perimeter of your foundation on the outside. It intercepts groundwater before it reaches your foundation walls, which makes it the more comprehensive solution when it’s accessible. The downside is that exterior installation requires excavating down to the footing — which is more involved, more expensive, and in Ardmore’s older homes, more likely to encounter unexpected conditions like lead soil or aging utility lines.
An interior french drain is installed inside the basement, along the perimeter of the floor. It doesn’t stop water from entering the foundation, but it captures it before it spreads and routes it to a sump pump for removal. Interior systems are less disruptive, can be installed year-round regardless of ground conditions, and are often the right call for homes where exterior access is limited or the foundation has already been compromised. For many of Ardmore’s pre-WWII homes — particularly those with finished basements or tight lot lines — interior systems are the practical choice. We’ll assess your specific situation during the free estimate and give you a straight answer on which approach actually makes sense for your home.
The most obvious sign is water where there shouldn’t be any — moisture along the basement walls, pooling near the foundation after rain, or a sump pump that runs constantly without keeping up. But a failing french drain doesn’t always announce itself that clearly. Sometimes the pipe has simply silted up over time, especially in the clay-heavy soils common throughout the suburban Philadelphia corridor, and the system is draining slowly rather than not at all. You might notice the problem only during a heavy rain or after a particularly wet spring.
If your french drain was installed more than 10 to 15 years ago, or if you moved into an Ardmore home and aren’t sure when the system was last serviced, it’s worth having it assessed. Ardmore gets roughly 46 inches of precipitation per year, distributed across all four seasons, so a drainage system that’s partially functioning will eventually be put to the test. We offer french drain cleaning and inspection services — we can camera the line if needed and tell you whether the system is worth maintaining or whether a replacement is the more cost-effective path. A free estimate covers that conversation.
Yes — we offer cash discounts on our services. For homeowners in Ardmore managing the real costs of maintaining an older Main Line home, that’s a meaningful option. Pre-WWII homes come with a long list of maintenance demands, and drainage work often competes with roofing, windows, HVAC, and a dozen other priorities for the same budget. A cash discount doesn’t change the quality of the work or the materials used — it just makes professional-grade, EPA-compliant drainage installation more accessible without asking you to cut corners on what actually gets installed.
We also provide free estimates with no pressure attached. The estimate is a real assessment of your property and what it needs — not a sales pitch with a number at the end. If the timing isn’t right or the scope isn’t what you expected, you’re not obligated to move forward. And if you have questions at 2 AM during a storm when your basement is taking on water, we have 24/7 phone availability and emergency response service. That’s not a line item in a brochure — it’s how we actually operate.
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