Tiles for laying on any surface are fixed with glue. Craftsmen and people who started repairs on their own, of course, know about this. But not everyone knows how much glue to take for work.
Professional workers always know how much glue is needed, but amateurs are not everything and they have to trust sellers in the construction markets. Before starting the repair, it is better to make calculations of the necessary materials, so as not to spend an extra penny.
So how much glue do you need? Let's analyze it below.
First, let's take a look at the basics: tile adhesive is measured in kilograms. The glue consumption is calculated per 1 m2, which is multiplied by the number of meters. The tiling installer usually sees the area that he has to tile, so he only needs to calculate the adhesive consumption. But no one will tell the exact figure, only it will be approximate.
There are three types of mixtures for glue
A) Based on cement - diluted cement with additives water or latex additive. The most demanded and economical option. The consumption of this glue will be from 1 to 1.9 kilograms per 1 m2 when applying 1 mm thick glue.
B) Dispersion is a resin-based liquid mixture.
C) Epoxy is a mixture of liquid resin and catalyst, as a result of a chemical reaction, an adhesive solution is obtained. It adheres well to the surface, does not crack and does not shrink.
We take into account the dimensions of the tiles
The consumption of glue depends on the dimensions of the tiles. So, the larger the tile area, the more glue is consumed. For small tiles up to 10X10 cm in size, cement glue, when applied in a thin layer, takes 2mm less.
If the sides of the tiles are from 20 to 30 cm, then the glue is applied with a thickness of 2 - 3.5 mm. If the thickness of the tiles is 30 * 30 to 50 * 50, then the layer is applied approximately 3.5 to 4.5.
And if the tile is large, then the layer is applied in a layer of 4 - 5 mm. The back of the tile is also lubricated with glue.
Spatula dimensions and thickness of applied glue
No glue is indicated on the package the thickness of the adhesive to be applied, and indicate the dimensions of the teeth.
Let's give an example: a spatula 8, used for tiles 30 * 30 cm.
If the tile has dimensions 50 * 50 cm, then use a spatula 12.
After all, it is impossible to measure the thickness of the glue applied to the tile. Even if you apply a layer of glue evenly, it will be even visually. Due to the fact that the glue is applied unevenly, the tile may not last very long.
Manufacturers advise to first apply the adhesive on the side of the spatula where there are no teeth, and then on the notched side.
Spatulas are produced with the sizes of teeth 6, 8, 12 mm.
Each glue manufacturer knows its properties and the exact layer, it will not be difficult to find out.
On the packaging of each glue, the manufacturer indicates the consumption in kilograms, it depends on the type of spatula.
Let's give an example: Ceresit CM12 glue, tiles measuring 30 * 30 cm, it is recommended to use a spatula with 10 mm teeth. In this case, the consumption of glue is 4.2 kg per m2.
Just do not think that if you take an 8 mm notched trowel, the adhesive will be 8 mm. Of course not. This is the height of the trowel ridges you ran at a 90 degree angle. If you drive the trowel at an angle, then the initial height should be less, and when the tiles are laid, the glue will be distributed over the entire area. The adhesive layer varies from 0.
3 to 0.5 times the size of the trowel teeth. If you use a trowel with 8 mm notches, the thickness of the adhesive will be approximately 2.4 - 4 mm.
Composition and brand of glue
The composition of glue depends on different brands, they come with different additives.
The density of the glue depends on this, that is, in bags of 25 kg there are different volumes of material, so the material is consumed in different ways. To calculate the glue consumption accurately, you need to know the name and manufacturer.
The reverse side of the tile tends to absorb glue.
The material from which the tiles are made has different porosities. For example, handcrafted tiles have a higher porosity and accept more glue than industrial glazed tiles.
For each type of tile, special types of glue are produced, but there are also adhesives that are suitable for tiles from different materials. When laying stone, it is necessary to apply a thicker layer of glue.
Tile base and technology
Before laying the tiles, inquire about the condition of the floor or walls. Their surface should be even, and in the case of an uneven surface, it should be leveled. In this case, you can apply the glue to the tiles in a thin layer, this will be enough for the tile to stick to the base.
The consumption of the finished solution depends on how even the base is.
In another case, the base surface is complex. For such cases, adhesives are produced with a self-leveling composition, it simultaneously glues the tile and levels the surface under it. With this method, more glue will be consumed.
Before you start, you definitely need to decide on the method of laying the tiles.
And assess the condition of your foundation. The surface can be of different porosity.
Here's an example : a cement base absorbs more adhesive than a concrete slab.
The consumption of glue will increase if you are tiling the facade or other external vertical surfaces, because for better adhesion you apply adhesive solution not only to the surface, but also to the tile itself.
The optimum temperature for laying tiles is 5 - 40 degrees of heat.
The most suitable temperature can be called 18 -24 degrees Celsius. When the temperature rises, the glue loses moisture and therefore its consumption will be greater, and at low temperatures the glue deteriorates and its consumption is unknown.
In windy weather, the glue loses moisture and it must be borne in mind that more of it is required.
Master's experience and technique
If you use with a spatula with an angle of 60 degrees, more glue is consumed, and if the angle is 45 degrees, then less glue is consumed. The shape of the spatula and the experience of the master also affect the consumption of glue.
There are a number of ways to calculate the glue:
3 kg per m2 and multiply by the average adhesive thickness (4 mm). The resulting figure will be inaccurate.
It is best to use the information indicated on the packaging by the manufacturer, and also keep in mind that the conditions under which the tiles were laid can affect the consumption of glue.
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