Basement Crack Injection in Dayton, OH

When a single crack in a poured concrete wall is weeping after every rain, injection is usually the tight, affordable fix. We fill the crack the full depth of the wall with polyurethane or epoxy, sealing the exact path the water was using. The important word is water: this is the waterproofing repair, and it works only when the crack is a leak and not a signal that the wall itself is under pressure.

Water crack or structural crack

A leaking crack and a structural crack can sit on the same wall and look nearly identical, which is where a lot of money gets spent in the wrong place. A narrow vertical crack that only weeps is a water path, and injection seals it. A horizontal or stair-step crack usually means the wall is moving, and injecting it just fills something that reopens next season. So we confirm which one you have first, in the evaluation, before anyone injects anything.

How the injection works

We inject polyurethane or epoxy under pressure so it travels through the full thickness of the wall, not just the face. Polyurethane flexes and is well suited to an active, wet leak; epoxy is used where the situation calls for it. Either way the goal is the same: seal the crack all the way through so water has nowhere left to travel.

When one crack is not the whole story

If water is coming in at several places or along the whole wall-floor joint, injecting one crack will not settle it, and the basement needs interior waterproofing to relieve the pressure across the perimeter. We tell you which situation you are in rather than injecting crack after crack against a problem that is bigger than any one of them.

What’s included

• A check that the crack is a water path, not a sign of a moving wall
• Full-depth injection with polyurethane for active leaks, or epoxy where appropriate
• Sealing the crack through the wall, not just skimming the surface
• A written scope and price before any work, and a referral to structural repair if the wall is moving

How it works

1. Confirm it is only water. We check the crack against the wall, because a leaking crack and a structural crack can look alike. Injection is right only when the wall is not moving.
2. Inject full depth. We inject polyurethane or epoxy through the crack so it fills the full thickness of the wall, sealing the whole path water was using.
3. Confirm it is dry. We check the crack holds against water, so the repair is a seal through the wall rather than a patch on the surface that leaks again.

Signs you need this service

• A single crack in a poured wall that weeps or drips after rain
• A damp streak or mineral trail running down from a crack
• Water at one spot on the wall rather than along the whole cove joint
• A crack that was surface-patched before and started leaking again