Epoxy grout injection and crack repair

Overview

Fixing the crack from the inside

A patch on the surface hides a crack for a while. Water and movement keep working behind it, and the crack opens again. Epoxy grout injection goes after the whole crack. Resin is pumped into the concrete under controlled pressure, fills the crack and the voids around it, and bonds to the concrete as it cures. The leak stops and the section is solid again, without excavation or tearing anything out.

Epoxy or polyurethane

• Epoxy injection: for structural cracks. Epoxy cures hard and bonds to the concrete, restoring the strength of the cracked section. It seals out water too.
• Hydrophilic polyurethane: for active leaks. It reacts with water and expands into a flexible foam that follows the water through the crack and seals it.
• Hydrophobic polyurethane: a dense barrier that doesn’t absorb water, for long-term waterproofing of cracks and joints.

Many jobs use both: epoxy to stabilize, polyurethane to keep the water out. We choose after looking at the crack width, the moisture, and the load the concrete carries.

Find the cause first

Before we inject, we want to know why the concrete cracked: settling, too much load, vibration, or water breaking it down. Some cracks are ours to fix right away. Some need an engineer to look at them first, and we’ll tell you when that’s the case.

Where we inject

Below-grade walls and slabs in parking garages and basements, foundations, retaining walls, warehouse docks and expansion joints, equipment bases, containment pits and trenches, tunnels, and piers and support towers.

Surface cracks in walls and decks are a different job. Those are sealed and coated as part of concrete and masonry restoration.

Little downtime

Nothing gets dug up or torn out, so the building keeps working while we inject. A garage stays open around the area we’re in, and a plant keeps running around the pit or base being repaired. Our crews follow OSHA and EPA requirements on every job.