What is grout?
Grout is a paste-like filler made from cement, sand, water, or epoxy resin that sets between tiles to seal gaps, prevent moisture ingress, and stabilize the tile surface.
The material that binds tile joints together is grout, a cement-based or epoxy compound applied in the spaces between tiles after they are set. Its primary function is to create a sealed barrier that prevents water, dirt, and bacteria from penetrating behind tiles and into the substrate, which is critical in wet areas like bathrooms and kitchens.
Two main types serve different purposes. Sanded grout contains fine aggregate and is used for joints wider than 1/8 inch, offering strength and durability in high-traffic areas. Unsanded grout has no aggregate and works better for narrow joints below 1/8 inch, as sand particles would not fit properly. For areas requiring superior water resistance and stain protection, epoxy grout provides a non-porous alternative that resists chemicals and moisture better than cement-based options, though it demands more skill to install.
The choice of grout affects both the appearance and longevity of a tile installation. Proper grout selection and application ensures the floor withstands daily use, moisture exposure, and thermal movement without cracking or deteriorating. When planning a tile flooring project in the Klang Valley, contractors at tile and marble flooring providers can advise on the most suitable grout type for your specific application and maintenance preferences.