What Is Grout?
Grout is a cement-based or resin-based material that fills the joints between tiles. It helps hold tile edges in place and keeps dirt and moisture from collecting in open seams. Grout comes in different colors and textures, and the right type depends on the tile, joint size, and location.
Quick Facts About Grout
Category
Tile joint material
Used for
Filling spaces between tiles
Common confusion
Grout is not caulk
Also called
Tile Grout
Often discussed with
Tile Installation, Bathroom Remodeling
Key Takeaways About Grout
- Grout fills seams, while tile covers the surface.
- Joint size helps determine the grout type.
- Grout is not the same as caulk.
How Grout Works
Grout is pressed into the open joints after tile has been placed. A float spreads the material across the surface and pushes it into the seams. The installer then removes excess grout before it cures.
Related glossary terms: Caulking, Waterproofing, Moisture Barrier.
Grout comes as cement-based or resin-based material. Cement grout suits many indoor tile surfaces, while resin grout may suit areas that need stronger stain resistance. Joint width, tile type, moisture exposure, and color all guide the selection.
Caulking serves a different purpose. Flexible caulk seals changes of plane, such as an inside shower corner. Grout fills fixed joints between tiles, but grout can crack where surfaces move.
Expert Note
When we install tile, we check that joints have a consistent width and that the tile surface is ready for grout. We work the material fully into each joint, clean the tile faces, and inspect corners for locations that need flexible caulk.
Grout in Practice: A Real-World Example
A bathroom backsplash may use light grout between ceramic tiles to create an even finished surface. The installer fills the joints, removes haze from the tile faces, and uses flexible caulk where the backsplash meets the countertop.
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Related Terms
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Waterproofing
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Moisture Barrier
A Moisture Barrier is a material or layer that limits water vapor and liquid water from…
Underlayment
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