Floor expansion joint running up a wall and through green carpet

At JointMaster®, our products allow for the natural shifting and movement of buildings and fortify against the spread of smoke and fire. Expansion joints are integral into the building’s design to accommodate movement and keep the building and the people inside safe from damage.

While expansion joints are incredibly important, they can sometimes seem a bit confusing as well. Our expansion joint experts will always be here to help, but we also want you armed with the information to pick the best products for your building.

Select from our variety of floor expansion joint systems, including: 100 Series Single Seal Covers, 200 Series Dual Seal Covers, 300 Series Glide Plate Covers, 400 Series Covers, 500 Series Pan System, 700 Series Heavy Duty Covers and the 800 Series Covers.

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Buildings are built with intentional gaps to handle the natural shifting and movement from nature…these gaps are architectural expansion joints. When designing your building, there are three main types of movement to consider: thermal, seismic and wind sway.

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Changes in temperature cause buildings to expand and contract which can leave you with disfigured or broken flooring components which could result in damage to your building structure and design.

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Earthquakes and other seismic events cause movement and swaying for an architectural structure. If your building is in a seismic zone, you will need to accommodate the movement with larger joint widths and the correct covers.

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Wind Sway

Tall buildings and structures with a large surface area are affected by wind sway that pushes against the building and causes tilt or swaying motions.



Standard, Moderate and Heavy Duty are designations as they relate to load ratings. These are provided as a guideline to assist in making a preliminary product selection for a given application.

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Standard suggests use in common applications such as a typical office setting or other spaces where pedestrian traffic or occasional rubber-wheeled traffic like mail carts and light-weight cleaning equipment are most common.

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Moderate suggests applications where occasional heavier maintenance equipment with soft rubber tires (such as gurneys, light duty scissor lifts, motorized cleaning equipment, etc.) would be added to the standard traffic. The systems in this category are comprised of heavier aluminum extrusions, with thicker walled extruded rubber inserts.

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Heavy Duty

Heavy Duty is for applications where truly heavy loads (such as vehicles) or high-point loads (such as mobile medical equipment, coin carts, materials handling equipment, etc.) are the norm. They are capable of multi-directional movements and are also available in surface or block out mounted variations.



While the aesthetic may not be at the top of the list when selecting expansion joint covers it can luckily still be part of the equation. JointMaster offers a wide array of systems to meet both your structural and design needs.

Rendering of a santoprene expansion joint floor system

Santoprene Seals - Functional and design flexibility perfect for retrofits or renovations (104 System)

Rendering of glide plate expansion joint floor system

Glide Plate - Smooth, no bump design that makes the systems ADA compliant (300 System)

Rendering of a centering bar expansion joint floor system

Centering Bar - Able to accommodate multiple flooring finishes, giving you ultimate design flexibility (430 System)

Rendering of a expansion joint floor pan system

Pan System - Modifiable to hold intricate and high-design flooring finishes (501 System)

Rendering of a cover plate expansion joint floor system

Cover Plate - Sleek, simple solution for architectural expansion joints (806 System)

Floor Expansion Joint Applications