Shower drain under the tiles: rules for design and installation

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One of the latest fashion trends in sanitary ware is concealed drain systems for shower rooms. From the instructions offered by the portal Our website, you will learn how to build a partition, equip a pallet, provide reliable waterproofing and install a shower drain under the tiles..

Shower drain under the tiles: rules for design and installation

Arrangement of a shower room

Quite often, modern renovation of a bathroom involves the arrangement of a shower room instead of a cabin or a pallet with a screen. This is a fairly successful solution that provides a high level of hygiene and aesthetics, but for the correct implementation of the idea, you need to take into account a number of features.

With the self-arrangement of the shower tray, it becomes possible to get rid of the difficulties with raising the floor level, which is necessary for the correct sloping of the sewer pipe. Utilities can run both in the wall and under the floor, while the minimum lifting height for ladders is 50-60 mm.

Shower drain under the tiles: rules for design and installation

The floor of the pallet should not only be higher than the cover in the bathroom, but also be surrounded by a side. For these purposes, it is convenient to use aerated concrete: this material is easy to process, which allows you to erect masonry of any configuration. You can read more about aerated concrete and its properties in the article on the website. Thanks to the heat-saving qualities of aerated concrete, the floor in the shower will warm up faster from hot water.

The formed pallet must have a waterproofing separate from that which is performed throughout the wet area of ​​the bathroom. The overlap of waterproofing on the walls should be above the sides, which themselves are waterproofed along the upper plane with a turn to the outside.

To install a hidden wall ladder, you will definitely need to make a niche and a wall or floor. A gas block partition allows you to do this without cutting into the capital structure that separates the bathroom. This solution is beneficial for small bathrooms: the partition is only slightly wider than the side, at the same time there is no need to fence the false wall and work on the correct adjoining of the screen.

Shower drain under the tiles: rules for design and installation

The difficulty of installing the ladder is that the niche and the slab must be done in advance, taking into account the thickness of the preparatory finish and tiles. For the correct operation of the drain, it is unacceptable that the cavities of the hidden installation remain without a protective coating and waterproofing.

Preparing for installation

Work on the installation of the shower drain is divided into several stages with reference to certain operations for the implementation of the interior decoration of the bathroom. To determine the exact order, you should study the installation instructions for the selected product..

Shower drain under the tiles: rules for design and installation

Imported manufacturers attach to the ladders a fairly detailed installation manual and special templates for marking. Low-cost products are accompanied only by a laconic sketch, although the sequence of installation on it can be established quite accurately. When unpacking a product from the PRC, you may find instructions from another product, or the complete absence of an installation manual. Fortunately, Chinese ladders have a typical device and the procedure for their installation is very similar, while European manufacturers can use very original solutions to provide additional reliability of fastening and waterproofing.

There are two types of shower drains: floor and corner, which are mounted together with the shower installation system. Preparation for the installation of the first type of drains consists only in the manufacture of technical cavities for the receiving funnel and a piece of the drain pipe. After that, the ladder is fastened by bricking it up with a building mixture on a mineral binder, then a screed is made from above with a slope of 1–2% to the drain hole .

Shower drain under the tiles: rules for design and installation

Most of the installation instructions for shower drains provide for the screed to be poured onto the shower floor after the funnel, siphon and pipe have been mechanically secured in position. However, manufacturers, offering such a solution, are silent about the difficulties of delivering a sufficiently large amount of concrete mixture to the upper floors of multi-apartment buildings and the risk of stratification of artisanal sand concrete when pouring such a thick layer..

In addition, the presence of a massive concrete slab under the shower floor will increase its heat capacity and make it unpleasantly cold. This effect can be leveled only by using concrete on expanded volcanic rocks, which itself is quite expensive. For these reasons, laying the main part of the floor with gas silicate blocks with the accompanying organization of recesses for the elements of the drain system seems to be a much more rational option..

Shower drain under the tiles: rules for design and installation

When installing the drain as a shower installation system, the drain funnel is attached to the frame, which itself is securely fixed to the wall and also carries the mixer, controls and piping system. In this case, you cannot avoid arranging a niche in the wall. Most structures involve installation in a frame false wall, the plane of which is 50 to 80 mm from the carrier.

It will not be a big problem to equip such a niche in the course of laying the gas silicate partition, and you will not need to carry out dirty and dusty work. But it is imperative to take into account the need to fasten the cladding over the metal frame in such a way that its plane coincides with the main surface of the partition. In most cases, it is convenient to use a water panel for this – one sheet will be enough. In this case, the niche needs to be expanded by 50mm on each side, in order to conveniently fix the profile on straight suspensions, and to it – the installation system.

Shower drain under the tiles: rules for design and installation

Tip 1: For a secure attachment in aerated concrete, use either special fasteners or special methods.

Advice 2: Draw in advance a scheme for laying gas blocks of the selected format, mark out all technological recesses. So you will be able to trim fragments of blocks along the masonry, at the end it will only be necessary to smooth out irregularities a little with a grater.

Installation and waterproofing of the floor drain

There are two ways to install a ladder in aerated concrete floor:

  1. Seal the cavities with a fast-setting solution on gypsum binders, and then perform a screed with a slope;
  2. After mechanical fixing of plumbing fixtures, fill the floor with a mixture with high mobility, and after partial setting, remove the slope-forming surface along the beacons.

Shower drain under the tiles: rules for design and installation

Important: you should not use dissimilar materials. If the filling of the cavities was carried out with a gypsum mixture, then the screed must also be performed with it. This also applies to the sealing of furrows remaining after the removal of beacons..

If the plumbing is fixed with brickwork, the body of the drain neck and water seal is installed first. The installation height is such that the sides of the hole are higher than the aerated concrete by the value of the minimum layer of the mixture that will be used when sloping. The slope-forming screed comes to naught at the side of the drain funnel and rises in all directions with a slope of 8–12 mm / m. The minimum and maximum height of the floor in the shower room is determined by the throughput of the drainage system: for quality products, the manufacturer indicates the optimal values ​​of the pipe slope depending on the diameter.

Shower drain under the tiles: rules for design and installation

The waterproofing of the floor drain is carried out in several stages as the shower drains are assembled. After pouring the screed, the first layer is applied, which covers an area of ​​at least 50 cm on each side of the ladder. After drying, a sealing tape is glued around the perimeter of the intake neck. Further, with the rise to the walls, a continuous waterproofing of the wet area is performed for laying tiles..

The following types of water protection can be considered reliable:

  • Bitumen membrane reinforced with glass cloth. It is recommended to purchase a hydro-barrier with a mineralized outer surface, or warm up the surface of the waterproofing with a hairdryer until it melts slightly and sprinkle with dry sifted sand.
  • Waterproof plaster. It is applied in a layer up to 15 mm, which necessitates leveling the walls at the boundaries of the wet zone. At the same time, plaster can be used as an adjustment layer to level surfaces.
  • Polymer cement coating waterproofing. Easy to apply, easy to mineralize with stone chips.
  • Surfacing waterproofing for flat roofs with a mineralized surface. Requires increased accuracy when making joints and mates, for work you will need a gas burner with an adjustable flame and a two-handed roller for rolling seams.

Features of installation and waterproofing of the wall drain

Wall ladders are more difficult to install, because the drain neck has to be set not in one, but in two planes at once. For accurate and reliable positioning, such systems are equipped with an installation in the form of a frame made of a profile pipe with a cross section of usually 50×50 mm. The installation has convenient devices for adjusting the height of the receiving funnel and its protrusion relative to the wall plane.

Shower drain under the tiles: rules for design and installation

In the standard version, the frame is attached to the frame of the false wall, for which you just need to pre-arrange the rack profiles with the middle shelves towards each other, connecting them with the neighboring ones using 2-3 crossbars on each side. If the installation is installed inside an aerated concrete partition, fastening is carried out either directly, provided that special fasteners are available, or by means of the same rack-mount profile, deployed by the middle shelf towards itself and fixed on halves of straight suspensions.

Shower drain under the tiles: rules for design and installation

The profile shelf facing the side wall of the niche is fastened with the extreme suspension fragment – a perforated plate. The remainder is used for fastening from the back. Thus, first, perforated plates must be screwed to the profile in 40 cm increments, then fixed to the side wall with self-tapping screws 60–70 mm, and then reinforced with L-shaped elements installed on the opposite profile shelf and attached to the rear wall of the niche.

Depending on the device, the installation frame can be attached only to the main structures, or also to the false wall frame. In the first case, the bottom of the installation is fastened to the floor using expansion anchors and the top to the wall using long steel rods..

Shower drain under the tiles: rules for design and installation

The procedure for waterproofing is similar to that of the floor drain. After the screed has solidified and the remnants of the damper tape are removed, the area adjacent to the drain is protected from leaks; when installing some models, at this stage a membrane is glued, glued by the manufacturer along the contour of the neck. The final stage is the application of the main layer of waterproofing in a continuous layer, while the approach to the wall in the area of ​​\ u200b \ u200bthe location of the drain should be at least one meter, or to the height of the location of the shower spout.

Shower drain under the tiles: rules for design and installation

After completing the waterproofing of the wet zone, a tile covering is laid, the indentation of which from the drain neck is determined by the assembly instructions. After that, in the manner prescribed by the installation manual, seals and a protective grill are installed, the joints are sealed with waterproof silicone.

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