
Sanded vs. Unsanded Grout: How to Choose the Right Grout for Your Tile Project
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When you've finally picked out your dream tile, the next big question often is: Which grout should I use, sanded or unsanded? With so many tile materials and grout options available, it’s easy to feel overwhelmed. At LMP Home, we’re here to simplify the process.
In this guide, we’ll break down the key differences between sanded and unsanded grout, explain when to use each, and highlight the benefits to help you make the best choice for your tile installation.
What Is Sanded Grout and When Should You Use It?
Sanded grout contains fine sand particles, making it thicker and more durable than its unsanded counterpart. It’s ideal for grout joints that are 1/8" wide or larger, and works especially well with:
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Ceramic and porcelain tiles
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Granite and terrazzo
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Flamed or brushed marble
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Pebble and rock mosaics
Why use sanded grout?
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Durability: Sanded grout acts like colored cement, offering strength and long-term stability.
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Crack resistance: Its thicker consistency helps prevent shrinking and cracking.
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Leak prevention: Properly packed sanded grout fills joints fully, creating a dense seal that helps block moisture.
This type of grout is best used in areas like floors, entryways, and bathrooms, especially where wider grout lines are needed and moisture resistance is essential.
What Is Unsanded Grout and When Should You Use It?
Unsanded grout is smoother and stickier, designed for grout lines smaller than 1/8", and is especially suited for more delicate tile surfaces. Use unsanded grout with:
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Polished or honed marble
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Glass and quartz tiles
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Mosaics and detailed inlays
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Smooth stone tiles
Why use unsanded grout?
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Scratch-free finish: Unlike sanded grout, it won’t damage soft or polished surfaces like marble.
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Clean lines: Ideal for tight joints (1/16"–1/8"), providing a sleek, elegant finish.
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Less abrasion: Perfect for vertical applications like shower walls and backsplashes.
Important tip: Unsanded grout must be firmly packed into joints to avoid shrinking or cracking as it dries. For optimal results, always follow the manufacturer’s instructions. Brands like Mapei provide detailed mixing and application guidelines right on the packaging.
Quick Comparison: Sanded vs. Unsanded Grout
Feature | Sanded Grout | Unsanded Grout |
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Ideal Joint Size | 1/8" or larger | 1/8" or smaller |
Best For | Floors, high-traffic areas | Glass, marble, wall tile |
Scratch Risk | May scratch delicate tile | Safe for polished surfaces |
Shrinkage | Low | Higher (if not packed well) |
Water Resistance | High | Moderate |
Final Thoughts
Choosing between sanded and unsanded grout depends on the material of your tile and the width of your grout joints. Each type has its own strengths and ideal use cases. When in doubt, refer to the product guidelines or reach out to a tile expert, like us!
Coming Soon: In our next blog post, we’ll cover how to install sanded and unsanded grout and the best ways to clean and maintain each type.
📩 Have questions or need tile advice? Email us at info@lmphome.com, we’re happy to help!