Wet Basement Repair

Most homes in Cary and the greater Triangle area are built on crawl spaces rather than basements, so when we talk about a "wet basement," we're usually really talking about a wet crawl space — the same water intrusion problem, just under a different kind of home. Either way, standing water or persistent dampness under your house is not something to live with. It compromises the structure and invites mold, rot, and pests.

Why It Happens Here

Cary's clay-rich soil doesn't drain well, and the area sees seasonal heavy rainfall that raises groundwater levels. Combine that with a sloped lot, a neighbor's runoff draining onto your property, or clogged and undersized gutters, and water finds its way against your foundation walls — and eventually in, through wall cracks, window wells, or the joint where the wall meets the floor.

What Wet Conditions Do to Your Home

• Weakens foundation materials over time, leading to cracks and settling
• Rots wood framing and support beams that depend on staying dry
• Creates ideal conditions for mold and mildew, which affect indoor air quality and can trigger allergy and respiratory issues
• Attracts pests drawn to persistent moisture
• Hurts resale value — a damp crawl space or basement is a red flag for buyers and home inspectors

How We Fix It

We start with an assessment to find where water is actually getting in, then build a plan around your specific situation — that might mean French drains to redirect water before it reaches the foundation, a sump pump system for water that does make it in, or a full crawl space encapsulation to seal the space and eliminate the moisture source. Most wet crawl space or basement problems need more than one of these working together.

Interior or Exterior Waterproofing?

Basement waterproofing splits into two approaches, and which one you need depends on where the water is coming from rather than on preference.

• Exterior work stops water before it reaches the wall — correcting the grade so the ground falls away from the house, extending downspouts properly, and intercepting groundwater with drainage. It deals with the cause, and it is the first thing we look at because it is often the cheapest thing that works.
• Interior work manages water that has already arrived — interior perimeter drainage routed to a sump pit, and a pump to lift it out. It deals with the consequence, and it is what you need when the source cannot practically be cut off outside.

Plenty of homes need both. What almost never works on its own is sealing the inside face of a wall with a coating while water continues to arrive behind it — the water does not stop, it just finds the next weakest point, and hydrostatic pressure keeps building against the wall in the meantime.

Where Water Actually Gets In

• The cove joint, where the floor slab meets the foundation wall — the most common entry point in a basement and the hardest to see
• Cracks in poured walls, or the mortar joints in block
• Around penetrations for pipes, conduit and hose bibs
• Window wells that fill and overflow because their own drain is blocked
• Over the top of the foundation wall entirely, where grading slopes back toward the house

Efflorescence — the chalky white mineral bloom on masonry — is worth knowing about, because it marks where water has been moving through the wall even when the surface is dry at the time you look. It is a map of the problem rather than the problem itself.