I want to use the tiles for a back splash in the kitchen. Is there a reason I have to use the spacers? Why can‘t I put them where they are touching each other? I‘m not using them on a floor. I don‘t like the look of the space between the tiles.
you need some space in between for the grout because in the long run it will make it more durable. when you lay your tiles, they need to cure/dry before you apply your grout making sure they won't be moving around. simple as that!
the spaces are important on wall tiles because you need the grout for extra support. Think about it. If the only support you have is on the bottom of the tiles, their is an increase chance of the tiles falling. The grout around each tile makes each tile attached independently having also side support.
It is partially for support(adherence to the wall) and also your wall 'breathes' and expands(small amounts)during the year. Having more grout between the tiles ensures a better % chance that they stay on the wall and also allows a slight flexiblity(although it doesn't look like it), for small shifting of the wall. The minimum space would be 1/8 for grout joints. It also depends on the size of tile one is using on the backsplash.
I hate the look of having to clean grout myself but you need it for support durability. Best advice is don't use white grout with blue tiles(don't use a contrasting grout). Nowdays you can get grout in many colors so get grout the same color as your tile. Also you should use spacers for a professional appearance or it will turn out looking like a first timer did it. However, use the smallest spacers possible for the size tile your using. I did both of these things the grout blends so well it looks like one tile is just flowing into the next!
Sorry to disagree with almost everyone, but, the two main purposes of grout are waterproofing and keeping a straightt and level run on the tile. Tile adhesive (for walls) is more the enough to hold a tile in place for a very long time (I tiled behind my fridge more than a decade ago and never got around to grouting). With that being said, you can use any width grout line you like. The thinner the line, the harder it is to keep your run straight and your tiles level to each other. Without a grout line, water can seep behind the tile and damage your wall (or sub floor). Even the most perfectly laid tiles done by a master tile layer will have a grout line. The best laid marble has a grout line of 1/16 th of an inch. That is VERY difficult to do right. Good Luck
