What is grouting in construction? The process of filling gaps, space, or joints between two materials like stones, tiles, marbles, etc is known as grouting in construction. Grout is a viscous material (a mixture of cement, water, sand, epoxy, acrylic, and polymer) used as a filler to fill the spaces and joints between ceramics and stone tiles. Grout is a dense substance that flows like a liquid and hardens upon application, often used to fill gaps or to reinforce structures. Learn about the different types of grout, such as tiling, structural, and nonshrinking grout, and how to use them for various projects. Grouting is a process of injecting a fluid material into gaps, voids, or spaces in structures to improve their integrity, stability, and durability. Learn about the different types of grouting materials, such as cement, chemical, structural, and resin, and their advantages for various construction applications. GROUTING definition: 1. present participle of grout 2. to put a thin line of mortar in the spaces between tiles: . Learn more.