When concrete expands and contracts, the pressure needs to go somewhere, or cracks will appear. Installing expansion joints is critical for new concrete projects and structural maintenance.

At WMG Caulking, we help residential and commercial property owners across Omaha, NE, and surrounding areas install and seal expansion joints correctly, ensuring long-term stability and strength.

Why Expansion Joints Matter in Concrete Construction

Concrete might seem solid and immovable, but it reacts to:

• Heat and cold

• Moisture

• Soil movement

• Heavy traffic or weight loads

Expansion joints absorb this movement and relieve internal stress. If you’re unsure how to install expansion joints, the good news is that the process is simple but must be done properly.

How to Install Expansion Joints: Step-by-Step

1. Plan the Joint Locations

Before pouring concrete, determine where movement is most likely to occur. Focus on:

• Transitions between slabs and walls

• Long or wide concrete sections

• Areas prone to weather exposure

This planning is crucial to fully realize the benefits of expansion joints.

2. Insert Joint Material

Common materials include:

• Pre-molded fiberboard

• Rubber, neoprene, or plastic fillers

• Foam backer rods for deeper joints

The material should be installed to the depth of the slab and sit flush with the top.

3. Seal the Joint

Once concrete is cured, the joint should be sealed with high-performance caulk or sealant to prevent:

• Water intrusion

• Debris buildup

• Chemical exposure

At WMG Caulking, we use professional-grade products for long-term joint performance.

Mistakes to Avoid During Installation

If you’re learning how to install expansion joints, avoid these common errors:

• Skipping the sealing step

• Poor alignment or placement

• Using the wrong filler material

• Inconsistent joint depth

A poorly installed joint can lead to structural failure down the line.

Get It Done Right with WMG Caulking

Knowing how to install expansion joints helps you protect your concrete from future damage. However, even a small mistake can reduce their effectiveness. Let WMG Caulking handle the planning, materials, and sealing—so you don’t have to.