1/21/2024 0 Comments Grouting marble tiles![]() ![]() This formula applies to the entire world of tile. The left side is ungrouted and the right side has been grouted. Minimum grout joint size + (variation of tiles x 3)= new minimum grout line size Grout changes the whole look of this fireplace. ![]() then you add 3/32 to that and the minimum grout line width is 5/32! (this is larger than 1/4 inch) So, if you have a rectified tile in an offset pattern the minimum joint is 1/8 inch. If your tiles are, for example, 1/32 inches higher in the middle than the edges, then you multiply that 3x and add that to the minimum grout joint size. This matters because this gets factored into the grout joint formula. This means that the centers will be higher than the edges. I’ve talked before about large porcelain tiles having a ‘basket-weave’ effect when they are installed in an offset pattern. The correct grout joint size, according to ANSI standards is… įor large format tile, if you installing an offset pattern, the minimum grout joint size is 1/8 inch for rectified tile and 3/16 inch for non-rectified. How to Calculate the Right Grout Joint Size (according to the tile industry) In general, tighter grout joints are more difficult installations than larger grout joints. However, if it’s your first go-round with 12×24 tiles you will probably want to stick to 1/3rd offset (or less) and 1/4 inch grout joints. If you have a highly skilled installer that has looked at the tile and determined that a 50% offset and 1/16 grout joints can be done then there is no reason not to proceed with that plan. ![]() Lastly, it’s important to calculate the skill of the person installing the tile into the formula. The skill of the person installing the tile I cover a more technical way to calculate the minimum grout joint size below. In general, you want a minimum of 1/8 or 3/16 inch wide grout lines for 12×24 tiles. The simple way to figure grout lines for 12×24 tiles When installing the popular 12×24 tiles, you have to remember that these tiles are usually warped to some extent.įurther, people like to install them in offset patterns.īecause of this, there is a technical and somewhat complicated formula for calculating the minimum grout joint size. These round purple spacers are 3/32 inch thick Grout joints for large format (12×24) tiles Otherwise, stacking tiles with no grout joint is not advisable. If that’s the case then you can feel free to stack your subway tiles on top of one another if you desire a nice & tight grout line size. Further, they may specify that these types of tiles would be OK to stack on top of one another using these spacing lugs. Some tile manufacturers will have small spacing lugs on the edges of the tile as a built-in spacer. It depends on if the tiles have spacing lugs already built-in to them. Subway tiles are a rare exception to the 1/16-inch grout line. With one exception, that is: Subway Tile with no-spacing However, the 1/16 minimum grout joint size should be honored with these tiles like you would with other tiles. While grout lines on subway tiles tend to be pretty narrow, it’s not uncommon to open up the spacing and make joints larger if that is what is desired. The blue horseshoes are 1/16th inch thick Subway Tile Spacing Īs long as these tiles are consistently sized they should be set with nice narrow grout joints and grouted with a non-sanded or fine-aggregate grout. However, this would go against tile industry guidelines and not be an advisable course of action. ![]() Oftentimes customers will ask that these be tight-set with no grout lines. I’m talking about the 3/8-inch thick natural stone tiles with square (or square-ish) edges. When installing marble, travertine, or other natural stone tiles a 1/16-inch joint is expected. For example: Grout line size for marble and natural stone tiles Take a look at the type and size of the tile that you are using. Also, if you aren’t clear on what grout is then I’ve written a post on tile basics. Things to Consider When Determining Your Tile Spacingįirst off, let’s talk about some different factors that may come into play when determining the size of the grout line.
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