Tile Spacers 101: Sizes, Grout Joints & Spacing Guidelines

Tile spacers help maintain consistent grout joints as tile is positioned, but choosing the right tile spacer size involves more than deciding how wide you want the finished grout lines to look. Tile dimensions, edge characteristics, manufacturing variation, layout, installation requirements, and manufacturer recommendations can all affect the appropriate grout joint width.

Understanding how tile spacer sizes relate to grout joints can help you plan a more consistent installation while avoiding joints that are too narrow for the tile being installed.

What Are Tile Spacers?

Tile spacers are small installation tools placed between adjoining tiles to help maintain consistent spacing while the tile is being set. They are available in different dimensions and configurations for floors, walls, mosaics, large-format tile, and other applications.

Traditional spacers may be cross-shaped, T-shaped, horseshoe-shaped, wedge-shaped, or another design. Some tile leveling systems also incorporate a spacer into the lippage-control component.

Shop our selection of tile spacers for different tile installation applications.

Common Tile Spacer Sizes

Tile spacers are available in numerous sizes, commonly expressed as fractions of an inch. Examples include 1/16", 1/8", 3/16", and 1/4", although other dimensions are available.

These dimensions describe spacer sizes, not universal recommendations for particular tile materials or rooms. A 1/16" spacer, for example, should not automatically be selected simply because the tile is rectified or because a narrow grout line is desired.

How Do You Choose the Right Tile Spacer Size?

Start with the tile itself. One of the most important considerations is how much the actual facial dimensions vary from one tile to another.

ANSI tile installation guidance states that the actual grout joint should be at least three times the actual variation in facial dimensions of the tile supplied. This helps provide enough space to accommodate dimensional differences while maintaining reasonably consistent grout joints.

That means the appropriate spacer cannot always be determined from the nominal tile size printed on the box. Tiles from the installation should be checked for actual dimensional variation, and applicable manufacturer instructions and installation requirements should also be followed.

Can You Use 1/16-Inch Tile Spacers?

A 1/16" spacer creates a very narrow nominal joint and may be suitable for installations where the tile dimensions and applicable requirements allow it. It should not be treated as the default choice for every rectified tile.

Rectification produces more precise tile dimensions than conventional calibrated manufacturing, which can make narrower joints possible. It does not mean every rectified tile is dimensionally identical.

The actual tiles should still be evaluated for dimensional variation before selecting the grout-joint width.

Are 1/8-Inch Tile Spacers a Good General Size?

1/8" spacers are commonly available and can be appropriate for many installations, but there is no single spacer size that works universally for ceramic, porcelain, walls, floors, showers, or large-format tile.

The required joint should be determined from the tile characteristics and installation requirements rather than treating 1/8" as a universal standard.

When Do You Need Wider Grout Joints?

A wider grout joint may be necessary when tiles have greater dimensional variation. Tiles with irregular or intentionally varied edges may also require additional joint width to maintain a visually consistent installation.

Increasing the joint width provides more room for the installer to accommodate differences between individual tiles. This is one reason very narrow grout joints can become difficult when tile dimensions vary noticeably.

The finished appearance matters, but aesthetics should not override the dimensional and technical requirements of the installation.

Rectified vs. Non-Rectified Tile Spacing

Rectified tile has mechanically finished edges intended to provide more precise facial dimensions. This can allow installations with narrower grout joints when the actual dimensional variation and other requirements permit them.

Non-rectified or calibrated tile may exhibit greater dimensional variation. In those cases, additional grout-joint width may be necessary to accommodate differences between tiles and maintain alignment across the installation.

Rather than selecting a spacer solely because a product is labeled rectified or non-rectified, inspect the actual tile and follow the applicable manufacturer and installation requirements.

Do Wall and Floor Tile Need Different Spacer Sizes?

Wall versus floor location alone does not determine grout-joint width. Tile dimensions, edge characteristics, dimensional variation, material, layout, installation environment, and manufacturer requirements are more useful considerations.

A floor installation does not automatically require a particular spacer size, nor does every wall installation call for a narrow grout joint.

This distinction becomes especially important when comparing rectified porcelain, handmade tile, mosaics, natural stone, and other products with very different dimensional characteristics.

How to Use Tile Spacers

Begin with a planned layout and the selected grout-joint width. As each tile is positioned in the setting material, use spacers to maintain the intended distance between adjoining tiles.

Depending on the spacer design and tile layout, spacers may be positioned between tile edges or at intersections. T-shaped spacers can be useful where three tile edges meet, while wedges and horseshoe spacers can provide additional positioning options for certain installations.

Continue checking the layout rather than relying on spacers alone. Reference lines, tile dimensions, alignment, and the overall pattern still need to be monitored as installation progresses.

When Should Tile Spacers Be Removed?

Removal depends on the type of spacer, setting material, installation, and product instructions. Conventional removable spacers generally need to be taken out before grouting so they do not interfere with proper grout-joint depth.

Do not rely on a universal removal time such as 20 or 30 minutes. Follow the setting-material and spacer manufacturer's instructions and remove reusable spacers at an appropriate point in the installation process.

Some products are specifically designed differently, including certain leave-in spacers, so always confirm how the particular spacer is intended to be used.

Can You Leave Tile Spacers in the Grout Joint?

Most conventional tile spacers are designed to be removed before grouting, but some spacer products are specifically designed to remain in the installation. Hollow or leave-in spacers are examples of products that may be intended to stay in place and be covered during grouting.

Do not assume that any spacer can be left in the joint simply because it sits below the tile surface. Follow the spacer manufacturer's instructions and confirm that the product is specifically designed for leave-in use.

Leave-in spacers should also not be treated as a way to increase grout strength. Their primary purpose is maintaining the specified spacing between tiles. Grout performance depends on the grout product, joint dimensions, preparation, mixing, placement, curing, and other installation conditions.

Tile Spacers vs. Tile Leveling Systems

Tile spacers and tile leveling systems perform related but different jobs.

Spacers primarily help maintain the intended grout-joint width. A tile leveling system is designed to help control differences in elevation between adjoining tile edges while the setting material cures. Many leveling-system clips also establish a specific grout-joint width.

A leveling system does not replace proper substrate preparation, mortar coverage, layout, or setting technique. Our guide to when to use a tile leveling system explains those systems in more detail.

Do Tile Spacers Prevent Tile Movement?

Tile spacers are layout and positioning tools. They should not be confused with movement joints within a tile assembly.

Movement accommodation is a separate part of tile installation design. Grout joints between individual tiles and designated movement joints serve different purposes, so simply increasing spacer size should not be treated as a substitute for required movement accommodation.

Common Tile Spacer Mistakes

• Choosing by appearance alone: A narrow grout joint may look desirable but still be unsuitable for the dimensional variation of the tile.

• Assuming rectified means identical: Rectified tiles can still have dimensional variation that must be considered.

• Using one size for every project: Wall, floor, porcelain, ceramic, stone, mosaic, and specialty installations can have different requirements.

• Ignoring actual tile dimensions: Nominal dimensions do not tell you how much individual tiles vary.

• Leaving removable spacers in grout joints: Conventional removable spacers should be removed as appropriate before grouting.

• Confusing spacers with movement joints: Regular grout-joint spacing does not replace movement accommodation required by the installation.

Choosing Tile Spacers for Your Installation

The best tile spacer size is the one that produces a grout joint appropriate for the actual tile and installation requirements. Start by checking tile dimensional variation, edge characteristics, manufacturer recommendations, layout, and applicable installation standards before settling on a joint width.

Once the required width has been established, spacers make it much easier to reproduce that spacing consistently throughout the installation.

Tile This carries tile spacers in multiple sizes and configurations for professional and DIY tile installations.