A grout float is a hand-held tool used for spreading and smoothing grout into the gaps between tiles during installation. The float typically consists of a rectangular or square base made of rubber, foam, or other materials, with a handle attached to the top.

Grout floats are used to evenly apply grout to the surface of the tiles, ensuring that the gaps are completely filled and the tiles are firmly set in place. The base of the float is pressed firmly against the surface of the tile, and the grout is spread and smoothed into the gaps using a back-and-forth motion.

Grout floats are available in various sizes and designs, from small handheld models to larger floats that can cover a larger surface area. They can be used for both wall and floor tile installations, and are particularly useful for large format tiles, such as porcelain or ceramic slabs.

Grout floats can be used in conjunction with other grouting tools, such as grout scrapers and grout brushes, for a more efficient and precise grouting process. They are an essential tool for both professional tile installers and DIY enthusiasts, as they help to ensure a high-quality and long-lasting tile installation.