Foundation Crack Injection
FOUNDATION CRACK INJECTION — EPOXY & POLYURETHANE REPAIR
Foundation crack injection seals cracks in poured concrete walls using epoxy (structural bonding) or polyurethane foam (flexible, waterproof seal). We surface-prep the crack, install injection ports, and pressure-inject material from bottom to top to fill the full wall thickness. Epoxy injection restores structural strength — polyurethane injection provides a flexible, waterproof seal that accommodates minor movement. Both methods are less invasive and more affordable than exterior excavation.
Starting at $300 per crack
Key Highlights
Structural epoxy injection
bonds cracked concrete stronger than the original, restoring full structural integrity.
Flexible polyurethane
waterproof seal that accommodates minor foundation movement without re-cracking.
Full-depth filling
pressure injection fills cracks through the entire wall thickness from inside.
Why Choose Our Foundation Crack Injection
Foundation crack injection is the most effective repair method for poured concrete foundation walls. We determine whether your crack needs structural epoxy (for stable, non-moving cracks) or flexible polyurethane (for cracks with minor movement or active water leakage). Both methods fill the full wall thickness without exterior excavation — saving time, money, and landscaping.
Signs You Need Foundation Crack Injection
1. Water leaking through wall crack
Water seeps through a visible crack in your poured concrete foundation wall during or after rain.
2. Visible foundation crack
A crack has appeared in your basement wall — even if it's not leaking yet, it should be sealed to prevent future water entry.
Our Process
Step 1 — Crack assessment
Evaluate crack width, length, pattern, and cause to select proper injection material (epoxy vs polyurethane).
Step 2 — Surface prep and ports
Clean the crack surface, install injection ports at intervals, and seal the crack face between ports.
Step 3 — Pressure injection
Inject material through ports from bottom to top until the full crack depth is filled.
Brands & Materials
- Simpson Strong-Tie injection systems
- Emecole epoxy
- CrackX polyurethane
FAQs About Foundation Crack Injection
Epoxy vs polyurethane — which should I use?
Epoxy for structural cracks that aren't moving — it bonds the concrete back together stronger than the original. Polyurethane for cracks with minor movement, active water flow, or where flexibility is needed. We assess each crack and recommend the right material for your specific situation.
Pricing
$300 - $800
per crack
*Varies by project scope and site conditions.
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You Get More Than a Guarantee
When you choose Legacy General Services for your concrete project in the NW Metro, you're choosing a partner committed to quality that lasts.
Reputation
MN-registered contractor since 2023. Insured and trusted by homeowners across the NW Metro.
Transparency
No hidden fees or surprise charges. Upfront pricing on every concrete project—big or small, start to finish.
Efficiency
On-time scheduling and reliable project timelines. We show up when we say we will and finish on schedule.
Quality
Air-entrained, freeze-thaw resistant concrete built for Minnesota winters. Every pour meets or exceeds code.