Here's Why You Might Be Having Water Problems (Even Though You Have a French Drain)

If your home already has a French drain (a sub floor drain system) and water is still showing up in the basement, the system itself is the usual suspect. Older Maryland homes typically have one of two aging drain types under the slab, and both fail in predictable ways.

Terracotta Systems: Crumbling and Clogging

Many older systems are terracotta: oblong, tubular, brick like sections seated next to each other around the inside perimeter of the foundation, under the floor, leading to a sump pit where a pump discharges the collected water outside. Terracotta served its era, but the sections crumble as they age, and the open joints between them invite sediment. Once a run collapses or packs with silt, water backs up under the slab and finds its way to your floor instead of the pit. Baltimore City rowhomes are full of these systems, many now approaching a century old.

Corrugated Drain Tile: A Silt Magnet

The other common failure is corrugated drain tile. Silt and sand travel with groundwater, and the ridged interior of corrugated tile catches them like a trap. These systems can stop functioning surprisingly fast, which is why we do not recommend drain tile for Maryland homes at all. When we open a floor and find a "failed" French drain, a silt packed corrugated pipe is one of the most common sights.

What a Modern System Does Differently

Oriole installs French drain systems built around 4 inch hard cased perforated PVC pipe: rigid, smooth walled, and sized to move real storm volume. A filter fabric lets water flow while screening out the sediment that kills lesser systems, and washed gravel around the pipe does the first stage of filtering. The system slopes to a properly sized sump pump, with a battery backup recommended for the outages that come with Maryland's worst storms.

Every home is different and gets its own engineered approach, and our interior waterproofing systems carry a lifetime transferable guarantee: the system is covered for your ownership and transfers to the next homeowner if you sell, all in writing.

If your basement is wet despite an existing drain, the fix starts with finding out what is under the slab. Schedule a free inspection or call (410) 879-3360 and we will diagnose the existing system and put the options in writing. Family owned since 1953, MHIC #4247.