When the waterproofing of the floors of restrooms and laundry rooms is completed, whether the system used in the insulation is bitumen «rolls» or paint insulation Coating here you must ensure that the insulation is applied in two layers and this is very important, after the paint insulation has dried, that is, three to five days after it is applied, the plumber begins to connect the drainage fittings for the sink, shower, bathtub, jacuzzi and other sanitary ware, as well as the extension of the air conditioners. The plumber proceeds to connect the drainage extensions for the sink, shower, bathtub, jacuzzi and other sanitary parts, as well as the air conditioner drainage extension, which is usually the responsibility of the air conditioning company, where all these extensions are connected to the inside of the plate, usually the plumber may shave some of the pieces in the waterproofing Here, the insulation contractor must be brought in to review the insulation work permanently after the plumber finishes all his extensions, and if there are any defects or cuts in the insulation, it is treated, and it is also recommended to spread a spacer layer of fiber fabric directly on the waterproofing, as the fiber fabric protects the insulation from burial In the event of any water leaks through the tiles, the fiber fabric allows water to pass through it and this water is directed by the tendency to the inside of the drain, through the additional hole that is implemented in the drain for this purpose, the fiber fabric is available at specialized bodies for insulation work and also at outlets selling building materials.

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This concludes the insulation contractor's work to insulate the bathrooms and laundry rooms, and be sure to receive the warranty certificate for the waterproofing work by the implementing body, knowing that the warranty may reach ten years.

After that, the tiler proceeds with the floor tile work for the restrooms and laundry rooms, where the tile is first polished, and care must be taken to ensure that the tile is made with "Kankari" gravel without dust, and when leveling the tile, care must be taken to achieve the slope towards the drain in order to ensure that water drains directly to the drain.

After that, the tiler proceeds with the floor tile work.

The level of floor tiles for bathrooms, kitchens and laundry rooms is recommended to be the same level as the tiles of halls and corridors, and there is no need to lower the floor level of bathrooms and laundry rooms by 1 or 2 cm from the level of halls and corridors, as the slope inside the bathrooms is sufficient to eliminate water directly to the drain.

When wishing to build a barrier (threshold) for the shower with a height of 10 to 20 cm, or to build a barrier later over the tiles using glass bricks, it is recommended to build a block and then plaster it, and then later cover it with tiles or other materials such as marble and so on according to the floor design, It is not recommended to install the bathtub, shower, before installing the tiles for the floors, when there are leaks or water leaks between the wall and the bathtub or shower, it is difficult to control or repair it except by cracking, it is good that these sanitary pieces (shower, bathtub, jacuzzi) are installed above the tiles and there are many options and designs available. When implementing marble for restroom floors, white cement should be used, also if the tiles used for restroom floors are marble slabs of large sizes, it is advisable to implement the floor tiles first and then proceed to install the wall tiles.

Floor tiles are installed using cement mix or glue, if the tiles (ceramic, terracotta, marble, granite) it is recommended to install them using cement mix, while if the tiles (porcelain) it is recommended to first apply a rough polish to the floor and after it dries it is installed using glue.

It is good that the size of floor tiles for bathrooms, laundry rooms and kitchens does not exceed 30×30 cm, as small and medium sizes help to achieve good tendencies without negatively affecting the overall shape, and the tendencies are not visible unlike tiles of large sizes.

At the same time, the tiler installs the drain, which is available in several sizes and types and is made of plastic, copper, stainless steel and the last is the best, also available in several colors and different designs regarding the shape and the mechanism of water drainage through it, noting that colored drains may not last (their colors) for a long time.

At the same time the tiler installs the drain, which is available in several sizes and multiple types and is made of plastic, copper, stainless steel and the last is the best.

The tiles are sprayed with water for at least four to five days when installed using the cement mix, after that the soil is made for the floor tiles, noting that the soil is available in several colors, in addition to the existence of types of soil that are resistant to bacteria.

The soil is available in several colors, in addition to the types of soil that are resistant to bacteria.

With this, we have finished an important part of the interior finishes, namely the plaster, gypsum for ceilings, floor tiles for the interior of the building, and in the next episodes will talk about the external works of the building regarding the facades and others, noting that our reference in this series is the book "Stages of building residential villas".