Foundation crack injection in Green Bay, WI
A leaking crack in a poured wall can often be sealed from inside in a single visit, without digging up the yard.
Crack injection seals a leaking crack in a poured concrete basement wall by filling it through its full thickness from the inside. Ports are set along the crack, the surface is sealed, and a liquid polyurethane or epoxy is pumped in under low pressure until it fills the crack to the outside face. For Green Bay-area homeowners with one or a few leaking cracks in an otherwise sound poured wall, it's a targeted fix that's much less disruptive than drainage or excavation.
Signs a crack is leaking
- Water or a dark stain along the crack after thaw or rain
- White mineral deposits on the crack line
- Damp carpet or drywall at the base of a wall
- A crack near a window corner or tie rod that drips
Why do poured walls crack?
Most vertical and diagonal hairline cracks in poured walls come from concrete shrinking as it cures, or from minor settling. They're usually not structural, but once wet clay holds water against the outside of the wall, the crack becomes a path inside. Clay soils that swell when wet and frost in winter can open a crack a little more each year. A horizontal crack is different and may mean the wall is being pushed; see bowing wall stabilization.
Polyurethane or epoxy?
- Polyurethane expands as it cures and stays flexible, so it handles small seasonal movement. It's the usual choice when the goal is stopping water.
- Epoxy cures hard and bonds the two sides of the crack. It's used where structural bonding matters on a crack that's no longer moving.
- Exterior repair. Digging down to seal the crack from outside, sometimes used when injection can't reach or the crack keeps reopening.
Injection works on poured concrete. Block walls leak through mortar joints and hollow cores, so they're usually handled with drain tile and core drainage instead.
What affects the cost?
- Number and length of cracks
- Polyurethane or epoxy
- Finished walls or obstacles that must be moved
- Whether the crack points to a larger problem
The company you're connected with prices the job after seeing the crack. We don't set or quote prices.
Communities we connect
Common questions
Can crack injection be done in winter?
Often, yes, since it's done from inside the basement. Very cold walls or active water can affect some materials, so the company may adjust timing or products.
Will an injected crack leak again?
A properly injected crack usually stays sealed, but a new crack can form nearby. Ask what the company's written warranty covers.
Can block walls be injected?
Injection is designed for solid poured concrete. Block walls leak through joints and hollow cores, which are usually handled with drainage instead.
Related services
Soils, Wisconsin contract rules and sump discharge: Brown County basement water guide.
Bowing block, a leaking crack, or a sump that runs all spring?
Call and a Brown County waterproofing company will come take a look.