How to Install Expansion Joints the Right Way
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.
