We have already talked in Tiling step by step (part 1) of the preparation of the support before tiling, this time we are going to see the different types of glue cement and when to use one or the other.There are different types of glue cement on the market, the one suitable for each application is determined by the type of tile to be placed, by the size of the tile and by the type of wall and the use to which it will be put.
Each manufacturer calls them differently, the two most used types are normal glue cement or flexible glue cement before tiling . Then we can find glue cement for swimming pools, refractory glue cement, for walls with plaster, etc ...We already spoke in the previous post, that whenever possible it is better that the support on which we are going to tile is a mortar base, but for special cases we will use a special glue cement.We will now see the different types of cement glue that we will use in each case.
Glue cement according to the type of tile
When we talk about the type of tile we are referring to the material with which they are made, the most normal being that they are red-paste, white-paste or porcelain. The difference is the hardness of each one, the red paste is the "softest" and the porcelain is the "hardest".
But what interests us most is the absorption that each one makes of the water, red pastes are the ones that absorb the most, so a glue cement of the normal type is sufficient, for white paste a normal glue cement is also sufficient, but For porcelain tile we will need a flexible glue cement, since otherwise the tile will not be glued correctly.
If instead of tiles it is another type of material it can help us to see the porosity of the material, if we pour water on the part where we are going to glue and the water is not absorbed, we must use a flexible glue cement.Gresite-type products, mesh stones and the like are recommended to use a flexible glue cement.
Glue cement according to the tile size
We have already seen the glue cement to use depending on the type of tile to be glued, but this will not be enough to determine the type of glue cement, since the size in this case matters a lot.
For "normal" sizes, we call tiles that do not exceed 30 x 60 cm normal size, a normal glue cement will suffice (as long as this type of glue is also sufficient in the type analysis), for larger sizes it is recommended Using a flexible glue cement, I would say that for sizes greater than 1m on some of the faces, the use of flexible glue cement is mandatory, since this type of tiles usually "curl" somewhat, so the cement must be flexible.In the case of large sizes it is also recommended to apply the glue both on the wall and on the tile, this is what is called double gluing.
Glue cement according to the type of wall
We have already talked a bit about this topic, the ideal is to have a wall with a mortar pit as a base for tiling, in which case the type of glue cement to apply will depend on the situations described according to the type of tile that is placed. But if the wall is plastered, you can apply a special gypsum cement glue, always follow the manufacturer's instructions for each "special" application.
Another thing to consider is whether the wall is interior or exterior, and choosing the right glue cement for such a situation.In the case of walls that are going to be in contact with water continuously, such as a swimming pool, a fountain or a built-in bathtub, it is recommended that it be a flexible glue cement, in the case of water that does not continuously stay in contact with the wall, such as a shower tray can be a normal glue cement.For walls that are going to suffer extreme temperature changes, flexible glue cement is also recommended.
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