Why do you need double-sided sizing when laying ceramic tiles with tile adhesive?

In the process of laying ceramic tiles, double-sided sizing is a very important step. Why double-sided sizing is necessary? This issue involves the quality and stability of ceramic tile paving. Below, Yigao Good Putty will tell you about the next step of construction after mixing - sizing!

At first glance, it sounds like pouring grout and laying bricks. If there are any technical difficulties, the operation is indeed relatively simple. However, compared with the previous use of cement mortar, which was directly poured and applied, there is still a certain degree of stress.

Tile adhesive construction must require double-sided sizing. Double-sided sizing can improve the bonding force between the tiles and the tile adhesive. Due to the smoothness of the tile surface and the characteristics of the tile adhesive, single-surface sizing may lead to insufficient adhesion between the tiles and the tile adhesive, thus affecting the stability of the entire paving system. Double-sided sizing can ensure a stronger connection between the tiles and the tile adhesive, improve the overall pull-out strength and shear strength, and ensure that the tiles are not easy to fall off or crack after being laid.

What are the benefits of double-sided sizing?

Double-sided sizing is very helpful in improving the filling rate. Improving the filling rate means increasing the effective bonding area and reducing emptying.

Get a safer tiling guarantee. So how does this method improve the filling rate?

Secondly, double-sided sizing can balance the water absorption of the tiles. Ceramic tiles usually absorb moisture. If double-sided sizing is not performed before paving, the tile adhesive will be quickly taken away by the moisture absorbed by the tiles during curing, resulting in a shorter curing time of the tile adhesive and affecting its curing effect. In addition, ceramic tiles are prone to deformation and cracking after absorbing water. Double-sided sizing can effectively slow down the water absorption rate of ceramic tiles, make the curing time of ceramic tiles and tile adhesive more balanced, and ensure the overall construction quality.

For example, suppose we are laying tiles now. The thickness of the tiles is 1 cm, and the thickness of the tile adhesive on the back of the tiles is 1 cm. If one side is sizing, it means that when we knead and press, we are exerting force on an object that is 2 cm thick; If the material is double-sided, we can assume that the back and base of the brick each have a tile adhesive with a thickness of 5 mm. Then when we knead and press, we are applying force to an object that is 1.5 cm thick.

Under the same force, double-sided sizing can achieve better kneading effect, which is very helpful to improve the fullness of the slurry.