Expansion Joint Repair

Concrete seems solid and indestructible, like bedrock for your building. And, in many ways it is! But it still requires occasional care and maintenance, both to ensure its own longevity as well as the safety of everything, and everyone, that it carries day in and day out.

One of the aspects of your concrete flooring that is important to monitor is the area around your expansion joints. They play an important role, allowing the otherwise brittle concrete to flex as needed under the weight of constant foot traffic, machinery, stored goods, temperature fluctuations, etc. In short, there is a lot working against your flooring’s integrity.

Why Repair Expansion Joints?

Concrete expansion control joints are prone to failure in two ways. The more serious form is when the slabs become uneven or the concrete begins to chip and crack along the joint lines. As the problem worsens, the failing joint becomes a health and safety hazard. When a forklift runs across a failing floor joint, the uneven surface jolts the driver and the load, putting employees and merchandise at risk. As the joint grows, it also becomes a trap for debris and dirt, breeding bacterial growth.

A secondary problem caused by failing expansion joints is the cracking and chipping of epoxy floor coatings. Many floor coating companies and painting contractors neglect to properly treat the expansion joints when installing an epoxy flooring system. Instead, they just paint right across the joint. Since the control joint is designed to flex, it quickly snaps the rigid epoxy, creating a fault line that quickly grows with foot and forklift traffic.

How To Fix Failing Expansion Joints

Redimere Surface Solutions can rebuild and repair problematic expansion joints. We start by grinding out the joint to remove all faulty concrete and paint, as well as debris. We then rebuild the concrete control joint with an epoxy mortar and recreate a level, smooth surface with a clean joint. Next, we apply the floor epoxy to the entire surface, and cut a clean line in the surface once it is dry. This cut line is then filled with flexible polyurethane joint filler, which creates a flexible joint in the epoxy surface that will flex with the slab beneath.

very respectful throughout the week. We are very impressed with their work.

—Chemical manufacturing plant manager

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