Crack injection is a concrete repair method used to fill and seal cracks by injecting resin under pressure. It restores structural integrity or prevents water ingress, depending on the material used.
Explanation
Crack injection involves installing injection ports along a crack and pumping specialised resin into the void. The type of resin determines the purpose of the repair.
Two common systems are:
- Epoxy injection – used for structural bonding and restoring load-bearing capacity.
- Polyurethane injection – used to seal leaks and stop active water ingress.
The process ensures the crack is fully filled, preventing further movement, moisture penetration, or deterioration.
Crack injection is commonly used in basements, retaining walls, car parks, slabs, and structural beams across UK commercial and residential buildings.
Why It Matters
If cracks are left untreated, they can:
- Allow water ingress
- Accelerate reinforcement corrosion
- Reduce structural performance
- Lead to more extensive repairs
When properly specified, crack injection is a targeted and cost-effective solution that avoids unnecessary demolition or replacement.