The core difference between sanded and unsanded grout is the presence of aggregate, specifically fine silica sand. Sanded grout is engineered for joints that are 1/8 inch to 1/2 inch wide. The sand provides the structural strength necessary to prevent the grout from shrinking and cracking as it cures. Because the sand is abrasive, it is not suitable for surfaces that scratch easily, such as glass tile, polished stone, or delicate metal finishes. Using sanded grout in joints that are too narrow will result in the sand failing to fit, leaving you with voids and poor joint fill. Unsanded grout is designed for tight, narrow gaps of 1/8 inch or less. It contains finer mineral fillers, creating a smooth, creamy texture that fills narrow spaces perfectly without scratching the tile face. However, it should never be used in wide joints because it lacks the aggregate needed to bridge the gap; doing so will cause the grout to shrink as it dries, leading to cracks and potential failure. Choosing the right grout for your specific joint size and tile type is a fundamental rule of professional tile setting. Always check the grout's technical documentation to confirm it is compatible with your specific tile material and joint width.
Key considerations
- sanded vs unsanded grout
- Polyblend Plus differences
- grout for small joints
- Custom Building Products
- Polyblend Plus
- Sanded grout