GROUT — a mixture of coloured cement, water, and additives like oxides or sand. Its primary purpose is to fill the gaps between tiles and tesserae, preventing moisture penetration and supporting the stability of the tiled installation.

When it comes to grout, it is important to differentiate between sanded and unsanded varieties. Sanded grout, which contains fine sand, is the preferred choice for most tiling projects. Its composition includes Portland cement, silica sand, inorganic aggregates, and chemicals. Sanded grout is ideal for creating wider grout lines and offers excellent joint strength due to the sand particles interlocking to form a robust bond.

One advantage of sanded grout is its affordability, as sand is a less expensive filler than the polymers found in unsanded grout. However, sanded grout is porous by nature and typically requires sealing with a pH-neutral, water-based, penetrating sealer to protect the underlying substrate from water damage. The durability of sanded grout is a key benefit, as it is less prone to shrinkage and offers enhanced strength.

On the other hand, unsanded grout is suitable for very thin grout lines and is easier to work with on vertical surfaces like tiled shower walls. Unlike sanded grout, unsanded grout does not contain silica aggregate filler. This makes it a better choice for scratchable surfaces, including certain ceramic, glass, metal, marble, or natural stone tiles.

Selecting the right grout type depends on factors such as the width of the grout lines, the tile materials, and the specific project requirements. Sanded grout is typically recommended for most applications, providing durability and stability. Unsanded grout is more suitable for delicate tiles and thin grout lines, ensuring compatibility and minimizing the risk of surface damage.