What Is Grout
Grout is the material visible between tiles. It is used to fill the space between the tiles and to support them. Selecting the right grout for the job is as important as selecting the right tile and backing. When selecting setting and grouting materials, special care must be given to the selection process. Use the best products that the budget will allow. Also, carefully following the manufacturer’s instructions in mixing and applying will ensure a successful installation.
Grout is not a tile but is an important part of any finished tile project. Grout is usually a cement-based material that is used to fill in the spaces between the tiles. Grout comes in various colors. There are basically two types of cement-based grout: sanded and un-sanded
After you have laid down the tile on its bed of mortar and let the mortar under the tile harden, it is time to apply the grout. Grout, either natural or colored is applied in the space left when you placed the tiles. It is not a good idea to do a zero spacing of the tiles as the tile material can expand and shift with temperature and moisture. The grout is like the glue that holds the tile edges in place in the pattern you have used.
Grout is also used to fill space or cavities and provide continuity between building elements. In some applications, grout will act in a structural capacity like in brick masonry or concrete masonry. In projects where small quantities of grout are required, it is proportioned and mixed on site. The ready mixed concrete producer is generally called upon when large quantities are needed.
Where You Are Putting The Tile Affects The Kind Of Grout Needed
Tile can be used almost anywhere: patio, kitchen, bathroom floor, kitchen backsplash, even inside the shower. Depending on the location, tile can get a little moisture, a moderate amount, or it can be absolutely soaked with moisture.
There are several choices when selecting grout for a tile floor, wall or countertop. An understanding of the types available can save headaches later. Grout, rather than tile, accounts for some of the worst problems associated with tile.
Most grouts are porous. This means that they will absorb water, and over time, this can damage the substrate of the grout in addition to eroding the grout itself. Mildew and mold will tend to develop, and they will spread under the tile, leading to serious problems in the future. In addition, the porous nature of grout makes it a magnet for dirt and stains, and it will quickly become unsightly with use. For these reasons, sealing the grout you have selected for your project is an absolute necessity.
How To Select Sanded or Non Sanded
- Most stone requires non-sanded grout to protect from scratches (exceptions include: Cobblestone and Slate).
- Spacer sizes 1/16 – 1/8 require a NON-sanded grout. This spacer size is used for natural stone, polished stones, rectified porcelains and some wall tile. The non-sanded grout will not scratch your product during grouting application. This gives a smooth and elegant look.
- Ceramic and porcelain floor tiles MUST have 1/8th inch grout line unless they are rectified.
- Any spacer size larger than a 1/8th should have Sanded Grout.
Typical characteristics:
- Often sets rapidly
- Usually a pre-mix product that needs only to be mixed with water
- Includes ingredients to compensate against cement stone shrinkage
- Use of shrinkage-compensating ingredients can result in volume increase over time.