Unsanded grout is a cement-based grout formulation without added sand particles, offering a smoother texture and finer consistency specifically suited to narrow tile joints, typically an eighth of an inch or less, and to delicate tile surfaces like polished marble, glass, or other materials that sanded grout’s coarser texture could scratch or damage during application and cleanup.
This smoother formulation genuinely matters for wall tile installations more broadly, since wall tile typically uses considerably narrower joints than floor tile applications, and vertical grout application benefits from unsanded grout’s easier, cleaner workability into these tighter spaces compared to attempting to force sanded grout’s coarser texture into narrow vertical joints where it would be genuinely more difficult to apply cleanly and completely.
Despite its smoother application advantages, unsanded grout genuinely shouldn’t be used in wider joints where its lack of structural sand reinforcement makes it considerably more prone to shrinkage cracking as the material cures, meaning homeowners and installers need to make this material choice based on actual joint width and tile material rather than simply defaulting to whichever grout type happens to be more familiar or convenient regardless of the specific application’s requirements.
What Does Unsanded Grout Involve?
- A smoother formulation without added sand particles
- Appropriate use for joints an eighth of an inch or narrower
- Genuine suitability for delicate polished stone and glass tile
- Increased shrinkage cracking risk if used in wider joints
Why Is Unsanded Grout Important?
For bathroom wall tile, glass tile backsplashes, and polished natural stone installations with narrow joints, unsanded grout’s genuine smooth workability and reduced scratching risk make it the appropriate, necessary choice that protects these more delicate materials while still achieving reliable, durable grout joints suited to the narrower spacing these installations typically use.
Homeowners should specifically discuss joint width and tile material with their installer before grouting begins, ensuring unsanded grout is used precisely where appropriate rather than assuming any grout formulation works interchangeably, since this material mismatch represents one of the more common, avoidable mistakes affecting both a tile installation’s appearance and its long-term durability.
Unsanded Grout vs. Sanded Grout
Unsanded grout offers smooth application suited to narrow joints and delicate polished or glass surfaces. Sanded grout provides genuine strength and crack resistance for wider joints, appropriate for most standard floor tile installations where joint spacing exceeds an eighth of an inch.