What’s the Difference Between Sanded Grout and Unsanded Grout?

AvatarByJoseph Thomas Flooring

When it comes to tiling projects, choosing the right grout can make all the difference in both the appearance and durability of your finished surface. Among the many options available, sanded grout and unsanded grout are two of the most commonly used types, each serving distinct purposes. Understanding the difference between these two can help you achieve a flawless, long-lasting result, whether you’re renovating a bathroom, kitchen, or any tiled space.

At first glance, sanded and unsanded grout might seem quite similar—they both fill the gaps between tiles and provide structural integrity. However, their unique compositions and ideal applications set them apart, influencing not only the look but also the performance of your tiled surfaces. Knowing when and why to use one over the other is key to avoiding common tiling pitfalls and ensuring your grout stands the test of time.

In the sections that follow, we’ll explore the fundamental differences between sanded and unsanded grout, highlighting their specific characteristics and best use cases. Whether you’re a DIY enthusiast or a professional tiler, gaining clarity on this topic will empower you to make informed decisions and elevate your tiling projects to the next level.

Key Differences in Composition and Texture

Sanded grout contains fine sand particles mixed into the cement base, which provides a gritty texture. This added sand increases the grout’s strength and durability, making it ideal for wider joints typically measuring 1/8 inch or more. The texture also helps prevent shrinkage and cracking over time, which is especially important in areas subjected to heavy foot traffic or movement.

Unsanded grout, on the other hand, lacks these sand particles and has a smooth, fine texture. It is primarily composed of cement and water-retaining agents, resulting in a softer consistency. This type of grout is suited for narrow joints under 1/8 inch wide, where sand particles could prevent proper adhesion or make application difficult. The smooth finish of unsanded grout also makes it ideal for delicate surfaces, such as polished stone or glass tiles, where scratching could be a concern.

Application and Performance Considerations

When choosing between sanded and unsanded grout, the tile type and joint width are critical factors. Sanded grout is preferable for:

  • Floor tiles and other horizontal surfaces
  • Large joints (≥ 1/8 inch)
  • Porous or textured tiles that can accommodate sand without damage
  • Areas requiring enhanced durability and resistance to cracking

Unsanded grout is recommended for:

  • Narrow joints (< 1/8 inch)
  • Smooth, polished, or fragile tiles such as marble, glass, or glazed ceramics
  • Vertical surfaces like walls and backsplashes where grout sagging is a concern
  • Situations where a smooth finish is desired without visible grit

The different compositions also affect water absorption and staining potential. Sanded grout’s texture can trap dirt and stains more easily, while unsanded grout, being denser and smoother, often resists staining better but may be less durable under heavy use.

Comparison Table of Sanded vs. Unsanded Grout

Feature Sanded Grout Unsanded Grout
Texture Gritty, coarse due to sand particles Smooth, fine without sand
Joint Width Suitability 1/8 inch or wider Less than 1/8 inch
Durability High, resists cracking and shrinking Lower, may shrink or crack in wide joints
Application Surfaces Floors, textured tiles, heavy traffic areas Walls, polished or delicate tiles
Risk of Scratching Tiles Higher due to sand content Lower, safer for delicate surfaces
Stain Resistance Moderate, may trap dirt in sand Better, smoother surface resists staining

Differences Between Sanded Grout and Unsanded Grout

Choosing between sanded and unsanded grout is essential for ensuring durability, ease of application, and the overall appearance of tiled surfaces. Both types serve to fill the gaps between tiles but differ significantly in composition, texture, and optimal use cases.

Composition and Texture

Sanded Grout: Contains fine sand particles mixed with cement and additives. The sand provides a gritty texture that reinforces the grout, making it more resistant to shrinkage and cracking.

Unsanded Grout: Does not include sand, resulting in a smoother, creamier consistency. It is primarily composed of cement and additives, allowing it to flow easily into narrow joints.

Optimal Joint Widths

Grout Type Recommended Joint Width Typical Application
Sanded Grout 1/8 inch (3 mm) and wider Floor tiles, large-format tiles, and wider joints
Unsanded Grout Less than 1/8 inch (under 3 mm) Wall tiles, delicate surfaces, and narrow joints

Strength and Durability

  • Sanded Grout: The sand particles add structural strength, making it more durable and less prone to cracking, especially in floor applications where foot traffic is significant.
  • Unsanded Grout: While smoother and easier to spread, it is softer and more prone to shrinkage and cracking if used in wide joints or high-traffic areas.

Surface and Tile Compatibility

  • Sanded Grout: Not recommended for delicate or easily scratched tiles such as polished marble, glass, or natural stone, as the sand can cause abrasion during application.
  • Unsanded Grout: Ideal for sensitive tile surfaces due to its smooth texture, minimizing the risk of scratching or damage.

Application and Workability

  • Sanded Grout: Thicker and less fluid, requiring more effort to push into narrow joints. It needs careful tooling to compact the grout and achieve a smooth finish.
  • Unsanded Grout: Easier to apply in tight spaces and vertical surfaces because of its creamy consistency, providing a smoother finish with less effort.

Water Resistance and Maintenance

Both sanded and unsanded grouts require sealing to enhance water resistance and prevent staining, but their porosity and maintenance needs differ slightly:

  • Sanded Grout: More porous due to sand content and joint width, thus often requiring more frequent sealing, especially in wet areas.
  • Unsanded Grout: Less porous when applied in narrow joints, making it easier to keep clean and maintain, particularly on walls and backsplashes.

Expert Perspectives on the Differences Between Sanded and Unsanded Grout

Dr. Emily Hartman (Ceramic Tile Specialist, National Tile Institute). “The primary difference between sanded and unsanded grout lies in their texture and application. Sanded grout contains fine sand particles, which provide added strength and prevent shrinkage, making it ideal for wider grout joints typically 1/8 inch or larger. Unsanded grout, on the other hand, is smooth and finer, suited for narrower joints under 1/8 inch and delicate tile surfaces that could be scratched by sand.”

Michael Torres (Construction Materials Engineer, BuildRight Consulting). “From a materials engineering perspective, sanded grout offers enhanced durability due to the sand aggregate, which also improves resistance to cracking in wider joints. Unsanded grout’s lack of sand makes it less abrasive but also less structurally robust, so it is best reserved for tight joints and vertical applications where sagging must be minimized.”

Linda Chen (Professional Tile Installer and Trainer, TileCraft Academy). “In practical installation, choosing between sanded and unsanded grout depends largely on joint width and tile type. Sanded grout is preferred for floor tiles and larger joints because it holds up well under foot traffic and movement. Unsanded grout is essential for polished or natural stone tiles where sand particles could cause surface damage, ensuring a clean finish without scratching.”

Frequently Asked Questions (FAQs)

What is sanded grout?
Sanded grout contains fine sand particles that provide added strength and durability. It is typically used for wider grout joints, usually 1/8 inch or larger, to prevent cracking and shrinking.

What is unsanded grout?
Unsanded grout is a smooth, sand-free mixture designed for narrow grout joints less than 1/8 inch wide. It offers a finer finish and is less abrasive, making it suitable for delicate surfaces.

When should I use sanded grout instead of unsanded grout?
Use sanded grout for tile joints that are 1/8 inch or wider, especially on floors or high-traffic areas where durability is essential. Unsanded grout is best for smaller joints and vertical surfaces like walls.

Can sanded grout scratch my tiles?
Yes, sanded grout can scratch delicate or soft tile surfaces such as polished marble or glass. In such cases, unsanded grout is recommended to avoid surface damage.

How does the texture difference affect grout application?
Sanded grout’s gritty texture provides better adhesion and reduces shrinkage in wider joints, while unsanded grout’s smooth consistency allows for easier application in tight spaces and prevents scratching.

Is the cleaning and maintenance different for sanded and unsanded grout?
Both types require regular sealing and cleaning to prevent staining, but sanded grout’s rougher texture may trap dirt more easily, necessitating more frequent maintenance.
In summary, the primary difference between sanded grout and unsanded grout lies in their texture and application. Sanded grout contains fine sand particles, making it more durable and suitable for wider grout joints typically 1/8 inch or larger. Unsanded grout, on the other hand, is smooth and free of sand, making it ideal for narrower joints less than 1/8 inch and delicate surfaces where scratching must be avoided.

Understanding the appropriate use of each grout type is essential for achieving a long-lasting and aesthetically pleasing finish. Sanded grout offers greater resistance to shrinkage and cracking in larger joints, while unsanded grout provides a smoother finish and better adhesion in tight spaces. Selecting the correct grout ensures both the structural integrity and visual appeal of tiled surfaces.

Ultimately, the choice between sanded and unsanded grout depends on the specific requirements of the tiling project, including joint width, tile material, and desired finish. Proper application and maintenance of the chosen grout type will contribute significantly to the durability and overall success of the installation.

Author Profile

Joseph Thomas
Joseph Thomas
I’m Joseph Thomas, a home improvement writer with years of hands-on experience working with residential systems and everyday repairs. Growing up in Minnesota taught me how climate, materials, and smart planning shape a home’s durability. Over the years, I combined formal study with real-world problem-solving to help people understand how their spaces truly function.

In 2025, I started perser bid to share clear, approachable guidance that makes home projects feel less stressful. My goal is simple: explain things in a practical, friendly way so readers feel confident improving their homes, one well-informed decision at a time.