Understanding Tile Expansion Joint

When tiling a floor, understanding expansion joints are essential for the longevity of your tiling job. Expansion joints ensure that your tile does not crack due to environmental factors like heat and humidity, which can cause tiles to expand and contract. This post will provide an overview of how tile expansion joint works.

What is a Tile Expansion Joint?

A tile expansion joint is a gap between two surfaces that allows for movement in the substrate without cracking the surface material. An expansion movement joint typically comprises elastic materials such as rubber, foam or plastic. When installed correctly, these materials absorb movement from the substrate and prevent the cracking of tiles due to thermal or structural changes in the underlying structure.

Tile expansion joints are most commonly used in areas with high levels of foot traffic, such as bathrooms and kitchens. They are also used on walls where tile meets other surfaces like drywall or hardwood floors. For instance, if you have a kitchen backsplash that meets up with a hardwood floor and there’s no other way to separate them (such as with trim), then an expansion joint should be placed where they meet up. That way, any minor movements in either surface won’t result in cracked tiles over time.

Why Are Expansion Joints Necessary? 

Expansion joints in tiled floors are essential for preventing tile damage caused by thermal expansion and contraction. Without them, the tiles will be unable to move freely as temperatures rise and fall, which can cause cracking or warping over time. Expansion joints also provide a place for caulk or grout to fill in gaps without damaging the surface below it. This helps maintain an even finish on your tiled surface.  

How Are Expansion Joints Installed?