Glossary

Concrete mixed with microscopic air bubbles that give water somewhere to expand when it freezes — preventing the surface from cracking and spalling over freeze-thaw cycles. The right spec for outdoor concrete in Indiana.

A basement wall that has curved or leaned inward under lateral pressure from the soil outside. Most common in aging block foundations. The longer this is deferred, the fewer stabilization options remain.

Strong, thin straps bonded to the interior face of a foundation wall to stop further bowing. Minimally invasive — no excavation needed — and effective on moderate wall movement.

A deliberate groove cut or tooled into a concrete slab so that when the concrete inevitably cracks from shrinkage, it cracks at the joint instead of randomly across the surface.

Filling a foundation crack from within using epoxy (structural) or polyurethane (water-stopping). Stops water infiltration and, with epoxy, restores structural continuity to poured-concrete walls.

Sealing a crawl space from ground moisture with a heavy-duty vapor barrier on the floor and walls, combined with drainage correction and often a dehumidifier. Significantly reduces the humidity that rots floor joists and rises into living space.

When one part of a foundation settles faster than another part, causing doors and windows to rack out of square, drywall to crack above openings, and floors to slope. Often shows as stair-step cracks in block or brick.

Adding length or underground piping to carry roof runoff 6–10 feet or more away from the foundation. One of the cheapest, highest-leverage fixes for a wet basement.

The white, chalky powder or staining left on concrete or block walls by water that has been moving through the wall. Not dangerous in itself, but a clear sign of regular water migration.

A structural resin injected into stable cracks in poured concrete walls. Bonds rigidly and restores structural continuity to the wall. Not appropriate for cracks that are actively moving.

Excavating to the outside of the foundation wall and applying a membrane plus exterior drainage to stop water before it enters the wall. More disruptive than interior systems, and used where conditions warrant it.

Water in soil or concrete freezes, expands by about 9%, and creates pressure. Repeated over Indiana's winters, it widens cracks, erodes mortar, and damages improperly mixed concrete. A major driver of foundation problems in this region.

A perforated pipe buried in a gravel-filled trench that intercepts groundwater and redirects it away from the foundation. Sized and routed based on actual site conditions — not a cookie-cutter layout.

The slope of the soil next to the foundation. Positive grade means the soil slopes away from the house for the first 6–10 feet. Negative grade — soil sloping toward the house — is a common and correctable cause of basement moisture.

A foundation crack running horizontally across a basement wall. In block walls, this is the most serious type — it indicates lateral soil pressure actively pushing the wall inward. Should not wait for inspection.

Pressure from groundwater pushing against a foundation wall. Persistent hydrostatic pressure drives water through walls and can bow them inward. Managed with drainage (exterior) or interior drainage systems.

A perimeter channel along the basement floor that intercepts water coming through walls or the floor-wall joint, routing it to a sump pit. Less disruptive than exterior excavation and handles most basement water situations.

Attaching a new joist alongside a damaged or sagging one to restore structural support, without removing the original. Standard fix for moisture-damaged floor joists above a crawl space.

A foam resin injected into foundation cracks to stop water infiltration. Expands to fill irregular crack profiles and remains flexible — appropriate for cracks that may experience small movement.

The wooden beam running along the outer edge of the floor system, sitting on top of the foundation wall. A common location for air leaks, pest entry, and moisture damage.

The wooden member bolted to the top of the foundation wall that supports the floor framing. Can rot from moisture or separate from the foundation during settlement events.

A crack in block or brick construction that follows the mortar joints in a diagonal staircase pattern. Indicates differential settlement. Severity depends on width and displacement.

The compacted stone and prepared soil layer beneath a concrete pour. Proper sub-base preparation is more important than the concrete itself for long-term performance — cheap crews skip this, quality crews do not.

The pit collects water from an interior drainage system; the pump expels it outside the home. Battery backup pumps are essential — heavy rain events are often when power goes out.

A warranty that moves with the home when you sell it — the new owner gets the same coverage you had. Legitimate selling point for resale; buyers and inspectors appreciate it.

A thick plastic sheet (typically 12–20 mil for encapsulation) installed across crawl space or basement surfaces to block ground moisture from evaporating into the space. Cheap original vapor barriers degrade within a decade; replacement during encapsulation is standard.

A thin, up-and-down crack in a poured concrete wall. Usually normal concrete shrinkage and not structurally concerning, but worth monitoring for growth or water intrusion.

An anchor driven through the basement wall and set in stable soil several feet outside the foundation. Over time, the wall can be pulled back toward plumb. A permanent solution for bowing walls when caught early.

The depth below the ground surface where soil is saturated with groundwater. Homes near the Ohio River or in low-lying areas of Jeffersonville and New Albany often deal with an elevated water table, which increases hydrostatic pressure.

A drainage system installed at the base of a basement window well to prevent it from filling with water and flooding the basement through the window. Common oversight in older construction.