Sanded vs. Unsanded Grout for Tiles: Key Information, Advantages, and Disadvantages

With more than twenty years of practical experience in renovating, repairing, and enhancing residences, Lee has been offering home improvement guidance for many years.

When selecting grout, you can opt for either sanded or unsanded varieties. While both types can serve similar purposes, choosing the right one for your specific tile can enhance the overall appearance.

• For grout lines wider than 1/8 inch, opt for sanded grout, as the fine sand within it creates a strong, secure, and stable bond.
• Unsanded grout is ideal for grout lines that are less than 1/8 inch wide, as its smooth texture enables it to fill narrow gaps more effectively. Additionally, it is suitable for fragile tile surfaces that might be damaged by the abrasive nature of sanded grout.

Grout for Sanded Tiles

• Reduced expenses
• Thick joints
• Additional color options

• Can damage surfaces.
• Not suitable for narrow seams.
• It is required to be closed tightly.

Sanded tile grout is a type of grout made from Portland cement, combined with silica sand, inorganic aggregates, and various chemical additives.

To achieve broader grout lines, sanded grout is the preferred option for the majority of tiling projects, as the sand particles interlock to create a strong bond.

Sanded grout tends to be more affordable than unsanded grout because sand serves as a more economical filler compared to the polymers found in unsanded varieties.

Because of its porous characteristics, unmodified sanded grout requires sealing to avoid water penetration behind the tile, which could damage the substrate. Use a penetrating sealer that is water-based and pH-neutral for this purpose.

Unfinished Tile Grout

• Ideal for upright surfaces
• Protects delicate tile surfaces.
• No need for grout sealing.

• Higher in cost
• Limited color options
• Depressions in broad joints

Unsanded grout, often referred to as non-sanded grout, is ideal for grout lines that are quite narrow, specifically those measuring between 1/8 inch and 1/16 inch.

Unsanded grout is more manageable than sanded grout when applied to vertical surfaces like tiled shower walls. Its absence of silica aggregate filler allows it to adhere effectively to delicate surfaces, including certain ceramic, glass, metal, marble, and natural stone tiles.

Applications

For general tiling applications like floors and walls, sanded grout is the recommended option. It is readily accessible, offers the widest variety of color blends, and minimizes the risk of grout shrinkage.

Both sanded and unsanded grout can be applied to vertical tiles like those found on bathroom or shower walls, but unsanded grout is often the superior choice. It adheres more effectively to vertical surfaces and is less prone to slumping compared to sanded grout. Additionally, the high polymer content and very low porosity of unsanded grout mean that sealing is not always necessary.

Sizes of Grout Joints

Sanded grout is ideal for grout lines that measure between 1/8 inch and 1/2 inch. Lines that exceed 1/2 inch are not advisable, as they are prone to cracking and instability. While unsanded grout is suitable for 1/8-inch lines as well, it is generally advisable to opt for sanded grout for better performance.

Unsanded grout is ideal for grout joints ranging from 1/16-inch to 1/8-inch in width. The primary reason for using unsanded grout in these situations is that sanded grout fails to adequately fill narrower joints. When unsanded grout is applied to joints that are 1/8-inch or wider, it may sag, develop cracks, and ultimately not fill the space effectively.

Suggestions for Tile Surfaces

Sanded grout is ideal for tiled areas where the risk of scratching from the sand particles in the grout is minimal. This characteristic is particularly advantageous for DIY enthusiasts who may lack confidence in their grouting abilities and might need to redo the grout at least once.

Unsanded grout is typically advised for tiles that are prone to scratching, including natural stone, glass, and specific types of porcelain and ceramics. The presence of sand in sanded grout could potentially harm these delicate surfaces.

Cost

Opt for sanded grout when budget is a major concern, since unsanded grout costs more than double that of sanded grout.

Sanded grout is quite affordable due to the low cost of sand, which constitutes the majority of its composition. In contrast, unsanded grout requires the addition of pricier polymers, which considerably increases its price.

Is unsanded grout more or less difficult to clean compared to sanded grout?

Sanded grout features a rougher surface, which can make cleaning more challenging. Its porous nature can trap dirt and grime. However, with a brush, appropriate cleaning products, and some determination, you can effectively clean it.

Is it acceptable to utilize sanded grout in a shower?

Both sanded and unsanded grout can be utilized for vertical tiles, like those found on bathroom or shower walls. However, unsanded grout adheres more effectively to vertical surfaces and experiences less slumping compared to sanded grout. If the gaps between your tiles are narrow, unsanded grout is the better choice. Conversely, for spaces wider than 1/8 inch, sanded grout is recommended.

What distinguishes the curing durations of sanded grout from those of unsanded grout?

The drying duration for both sanded and unsanded grout is approximately equal. Generally, it takes about 72 hours for it to cure. To ensure safety, it is advisable to wait at least seven days before subjecting it to any moisture.