Most foundation crack calls in Dunmore come from a hairline vertical crack in a poured concrete wall that is actively leaking during a hard rain or spring thaw. Vertical cracks under 1/8 inch wide are almost always shrinkage cracks from the original pour, not structural. We clean the crack with a wire brush, set injection ports every 8 inches, and inject polyurethane that expands to fill the full wall thickness. The polyurethane flexes with seasonal movement, which is important over NEPA mine country where subsidence shifts a wall 1/16 inch a decade.
Block foundation walls in older Dunmore houses, especially the postwar builds in the Smith Park area and down toward McCarthy Terrace, fail differently. Water fills the hollow cores of the block and leaks out through the horizontal mortar joints. A straight crack injection does nothing for a block wall because there is no continuous concrete to bond to. For block, we core-drill weep holes at the base of each block course and tie them into an interior perimeter drain. That drops the water out of the block and relieves the pressure.
Horizontal cracks are a different animal. A horizontal crack running along the middle of the wall at the frost line, usually 36 inches down, is almost always a sign of lateral soil pressure. In Dunmore that pressure comes from a combination of 50 inches of annual snow, pyrite shale fill backfill from the 1950s and 1960s subdivisions, and the freeze-thaw cycle that runs December into March. If the wall is bowed more than 1/4 inch at the horizontal crack, we add carbon fiber straps set with structural epoxy on 48 inch centers. Carbon fiber straps run 400 to 700 dollars per strap installed.
The mistake we see most from DIY crack repair in Dunmore is a bead of hydraulic cement smeared on the inside face of the wall. Hydraulic cement is a one-season fix. It bonds to the dirty inside face, it does not fill the full wall thickness, and the next freeze-thaw cycle pops it right off. We tell homeowners straight: if you can see a crack from the inside, the water path through the wall is already set. You need an injection that fills the full 8 to 10 inches of wall thickness, not a smear on the surface.
What we handle
Polyurethane Crack Injection
The standard fix for active water leaks through poured concrete. Ports every 8 inches, low-pressure injection, full wall thickness fill, cures in 20 minutes. Flexes with the seasonal movement that is normal for NEPA mine-country foundations.
Epoxy Crack Injection
Structural bond for non-moving cracks. Used when the wall needs to behave as one piece of concrete again, like after a settlement event or a frost heave crack that has since stabilized. Stronger than the concrete around it.
Block Wall Water Control
Core-drill weep holes at the base of hollow concrete block walls and tie them into an interior drain system. The right fix for block foundations in postwar Dunmore houses where water fills the hollow cores and seeps out through the mortar joints.
Carbon Fiber Wall Reinforcement
Carbon fiber straps set with structural epoxy on 48 inch centers across bowed basement walls. Stops the wall from moving further and is a fraction of the cost of a full wall rebuild.
Horizontal Crack and Bowing Wall Repair
Lateral soil pressure cracks running horizontal along the frost line, usually at 36 inches down in Dunmore. We stabilize the wall with carbon fiber plus crack injection and tie into an exterior drain if the grade is pushing water against the wall.
Emergency Active Leak Injection
Same-day response for a crack that is actively flowing water during a storm. We can inject under a wet condition with hydrophilic polyurethane that cures in the presence of water. The crack seals before the storm ends.
How the job goes
1. Free Phone Intake
You call, we ask about crack location, orientation (vertical, horizontal, diagonal), width, and whether it is actively leaking. You get a likely cause and a per-crack price band before we come out.
2. On-Site Inspection and Crack Map
Foreman walks every wall, measures each crack with a feeler gauge, photographs it, and marks it on a basement sketch. We identify which cracks are structural and which are cosmetic. Usually 30 to 60 minutes.
3. Written Scope and Per-Crack Quote
You see a price per crack on paper before we start. Polyurethane cracks priced flat. Carbon fiber straps priced per strap. Block wall weep hole systems priced by linear foot.
4. Wire Brush, Port, Inject
We clean the crack to clean concrete, set injection ports every 8 inches with surface seal epoxy, and low-pressure inject polyurethane or epoxy through the full wall thickness. Each crack takes 20 to 40 minutes to inject and cure.
5. Port Removal and Cleanup
We grind the ports flush with the wall, patch the surface seal with a thin concrete repair mortar, and shop vac the floor. Written warranty and before-and-after photos emailed or printed before we leave.
What's included
- Free on-site inspection with full crack map and photographs
- Written flat-rate quote per crack before work starts
- Low-pressure polyurethane or epoxy injection through full wall thickness
- Hydrophilic urethane for cracks that are actively leaking during injection
- Surface seal grinding and patching after injection cures
- Lifetime transferable workmanship warranty on polyurethane injections
- Haul-away of injection ports and debris
- Before and after photo documentation of every injected crack
What it costs
Most foundation crack repairs in Dunmore run 400 to 1,500 dollars per crack all-in. Carbon fiber straps for bowed walls run 400 to 700 dollars per strap installed. Free inspection and written per-crack quote every time.
| Job | Typical price | Notes |
|---|---|---|
| Polyurethane Crack Injection | $400 to $900 | Standard vertical shrinkage crack in a poured concrete wall. Flat rate per crack regardless of wall thickness up to 12 inches. |
| Epoxy Structural Crack Injection | $600 to $1,500 | For non-moving structural cracks that need the wall to bond back into one piece. Higher-end for cracks over 6 feet long. |
| Carbon Fiber Wall Strap (per strap) | $400 to $700 | Installed on 48 inch centers across bowed walls. Includes surface prep, structural epoxy and the carbon fiber mesh itself. |
| Block Wall Weep Hole System | $1,200 to $3,500 | Core-drilled weep holes at the base of hollow block walls tied into an interior drain. Priced by linear foot of wall. |
| Emergency Active-Leak Injection | $600 to $1,200 | Same-day response for a crack actively flowing water during a storm. Hydrophilic polyurethane that cures in a wet crack. |
| Free On-Site Crack Inspection | Free | Full basement walk, crack measurement, photograph and written per-crack quote. No service call fee. |
Ranges are typical for Foundation Crack Repair jobs in Dunmore and confirmed with an exact written quote before any work starts.