Is it possible to lay tiles on aerated concrete blocks without plaster (why does the tile fall off)
Aerated concrete is increasingly being used to build a house. The first reason for choosing a material is its low cost. Environmental friendliness does not play a big role. The gas block does not require mandatory insulation. The material is lightweight. You can build a house of any configuration in a few weeks.
The only serious disadvantage of the material is its high moisture absorption. For external walls, it is better to use gypsum-lime or cement-lime plaster.
For internal - silicone or silicate.
To lay the tiles, it is necessary to achieve a flat surface. There should be no pits, bulges. But aerated block masonry is usually even. And the thickness of the adhesive composition may well be sufficient. Is it possible to finish (lay the tiles on the gas block) without plaster?
For better adhesion, it is necessary to clean the wall from dust, prime it. But even this sometimes does not help, the tile falls off after laying. The reason lies in the hygroscopicity of the material (gas block). Blocks absorb moisture well from the adhesive solution. The strength of the adhesive on the wall is lost and it does not hold the tiles. The glue becomes loose and flakes off.
I'll tell you about the cheapest finishing method. If you need to lay tiles on the gas block.
Using gypsum plaster is not an option. You also need beacons (from 50 rubles per piece). If not beacons, then you need a grid. Dirt, dust are also taken into account when preparing the solution and applying it to the walls. We will also remember the time spent on all the work.
How to process the walls of the aerated block so that the tiles hold tightly, do not fall off, and everything is smooth?
There is drywall. He will do 2 functions at once: the wall will become flat and communications can be laid if desired. It costs between 200-350 rubles. In addition to this material, you need to buy polyurethane foam adhesive. Within 200-400 rubles per cylinder of foam. Low consumption, quick-setting.
There is no need to make a frame. We just glue it on the glue-foam and that's it. For fidelity, you can also screw it onto the screws. It is easy to work with drywall and there will be no dirt like plaster.
Cons of using drywall - reducing the space on each side by 1 cm. But on the other hand, evenly laid tiles will never fall off.
Of course, it's up to you what to choose and what is best. But many do so now because of the speed, simplicity and low price.