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Baths in drywall - the devil is in the details

modern bathroom

Modernization, renovation, education or rebuilding - the "dry type" especially in housing and housing construction is of great importance. For many homeowners to offers "expandable attic" to expand the felt to be tight space situation for example. As larger, more independent children or as a guest room.

But only with the installation of a separate bathroom, the additional living space is perfect. Is needed in a house additional living space, this can often be created with a loft conversion. Here then find children's or guest rooms to small apartments square.

This article describes what to consider in a bathroom on the roof - so much trouble is spared in hindsight!

Contents for Bathroom in drywall

  • Wall construction in drywall
  • In practice: Wall sealing step by step
  • Floor structures - tiles and waterproofing
  • Sealing the bare concrete floor
  • Conclusion to bathrooms in drywall
  • Important technical terms for drywall

Yourselfers who are planning a dry construction with gypsum boards can save time and money. The advantages of dry construction are convincing: pre-engineered systems for rapid installation of "lightweight wall constructions" on stable stand works from metal profiles, short drying times and plan flat walls and ceilings that are now wallpapered or can be covered with tiles. These advantages ensure the rapid and easy to perform expansion.

When dry fitting of bathrooms, however, it is important to take into account the special requirements for moisture protection. Because gypsum sucks inherently water and swells. Only through a seal directly between drywall and tiles, including the solution of all problems of detail, a permanent, sustainable and safe protection against damage from moisture can be achieved with little effort. The method of sealing in conjunction described below is applied by professional tilers in the same shape and conforms to accepted craft rules.

Bathroom in a converted atticA spacious bathroom in the attic - with drywall systems can be also create on their own performance, the wellness oasis.

Yourselfers should use the expansion of baths on drywall systems in which all components such as substructure, Gipsplattenbeplankung, screws and joint filling are matched and tested. The pitfalls when drywall in bathrooms are in the details, such as. As in the transitions between different wall constructions, the various pipe penetrations, etc. When connections and unpleasant surprises of home improvement certainly would not want that!

Wall construction in drywall

Baths in drywall

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Metal double stud walls as installation wall (example Rigips).

  1. Plasterboard vario building panels
  2. Metal substructure
  3. cavity damping
  4. Support stand for wall-mounted toilet and concealed cistern
  5. Support stand for washbasin

The three main advantages of a bonded waterproof drywall:

  1. No penetration of moisture-sensitive substrates and thus no lingering damage to the substrate.
  2. The construction remains dry. The seal consists of a casting without seams and joints.
  3. A secure and flexible adhesion of the ceramic coating on the seamless seal.

Walls in bathrooms can be built with single or double stud frame as a supporting base for ceramic tiles. Double stud walls also serve often as a design for the integration of sanitary installations. It is important here that the opposite stand works are connected by tabs, so as to achieve sufficient stability.

Water-resistant construction boardsFor planking of the drywall in the bathroom water-repellent-impregnated plates must be used.fill in moisture-proof platesJoints and screw holes with a - auszuspachteln putty - possibly belonging to the system where the same manufacturer.

In principle, the skins are force-locking connected to the floor structure in the above-wall structures. The planking of the walls is usually made of a double layer of plasterboard (2 x 12.5 mm) or only a sheet having a thickness of at least 20 mm.

When choosing this Beplankungsarten the required stand distance of 62.5 mm can be maintained. In planking of plasterboard with a smaller thickness significantly reduced stand spacing is required to produce a sufficiently rigid base for ceramic coverings.

In addition to the stable mounting of the frame construction of the actual surface of the panel and its Verspachtelung comes to special attention. Because depending on the existing edge formation of the planking different Verspachtelungssysteme can be performed with or without joint tape.

Basically, any excess filler material to remove or repel; smoothing the plaster and surface application or the lateral distortion of the fillers over the actual joint area also, should always be avoided.

In practice: Wall sealing step by step

Before starting work, you should check the substrates for suitability. Besides the usual drywall as plasterboard, gypsum fiber and gypsum wallboard, the following substrates are:

  • concrete
  • Hand and machine plaster on gypsum, cement or gypsum-cement base
  • Building panels made of aerated concrete
  • Hollow wall panels of lightweight concrete

Not suitable are lime plasters and lime-gypsum plasters. Its structure is not solid enough for a permanent durable seal.

On the ground, concrete surfaces are suitable as cement, flow and mastic asphalt. More about Soil sealing can be found further down on this page.

Materials and tools

  • Spreadable Badabdichtung (liquid film)
  • sealing tape
  • paint Roller
  • brush
  • Plastic spatula or wooden spatula
  • Possibly. solvent-free Tiefengrund
  • Possibly. Repair Putty

Prepare wall for sealing

Clean the surface first of all loose material such as dirt, dust or Gipsbröckchen. Also, release agents, such as fats are to be eliminated. Drywall must be clean and even plastered in other walls close damage, plug holes and the like with a repair putty. Tile adhesive is also suitable for this purpose. Strong or very different absorbent surfaces are treated with a solvent-free penetrating primer to regulate the absorbency.

Subsequently, injected, if not done in the construction, corner, perimeter and movement joints made with silicone. Also fitting connections are sealed way. Here, however, only neutralvernetzendes silicone must be used in order not to jeopardize the metal surfaces from corrosion.

apply waterproofing

With the application of the sealing coat-one begins in the corners, edges and transitions. Here one works best with the brush. Subsequently, the areas can be finished with the role. Apply the seal everywhere tired and always work your wet-on-wet. If you do not want to emphasize in each case the entire wall, which must Abdichtanstrich the wall in the shower until at least 30 cm above the shower head or above the bath to at least 20 cm above the bath tap fitting cover.

In the corners and connections to sanitary articles you put the paint associated with the sealing tape into the freshly applied liquid film. Be sure to use paint and sealing tape from the system from the same manufacturer. Then you can be sure that both can be processed together without problems.

Also pipe penetrations around sealing strip is inserted into the mass. You can do this cut cuffs from the band by providing you a piece of ribbon with star-shaped incisions, but there are also ready to buy cuffs.

underline seal in the corner with the brushIn the corners and connections of the sealing paint is applied with a brush. On the surface, the role is used.Sealing sleeve for pipe penetrationsCuffs for pipe ducts are readily available in many systems. You can also crop of sealing strips them.Sealing tape with sound insulationspecial sealing tapes with integrated sound insulation strips are available for the sealing of connections between about bath and wall.

Press the tape with a suitable non-sharp object smoothly in the corner or around the implementation and make sure that it rests clean everywhere.

Let the first coat now following the manufacturers instructions to dry. The drying time is usually a few hours. Then the second coat follows. About Stroke initially covering the sealing tape at the edges and then all other surfaces.

After drying, the second layer - again as prescribed by the manufacturer - can be attached to the final wall covering: tiles that are laid with a highly flexible tile adhesive, then worry even in highly water-stressed regions such as in the shower or the bathtub for a perfect waterproof surface ,

Tip: sealing on old tiles

Even an old tiled surface to be tiled over, must be sealed, because usually no one knows what it looks like underneath. For this, but a little more preparatory work is required.

First, the tiles are cleaned with caustic lye or another alkaline detergent. Such cleaners can be found at the hardware store usually in the paint department. Then fill from the tiles with a flexible tile adhesive, so that then the gaps are filled and a flat surface is formed. On this surface, you can just continue to work as described above, after drying of the adhesive.

Floor structures - tiles and waterproofing

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In most cases, one finds a covered with chipboard wood-beamed ceiling in the attic of one's home. This floor vibrates to a small extent and expands due to fluctuations in humidity (especially in seasonal changes summer / winter) from or contracts. Because of these natural movements he is initially unsuitable for accommodating a hygienic and easy to clean tile covering.

To the rigid floor tiles from the flexible substrate "undock" offer various manufacturers "Entkoppelungsmatten", E.g. of a bonded with polyurethane rotting coconut fiber to. The same mats are mainly offered as impact noise mats.

The tiles are laid with flexible tile adhesives on this surface. In order for a permanent bond of the tile is secured to the ground, because the movements of the substrates are not hindered.

Ceramic tiles in dry

For over 10 years, the seal in direct composite has proven ceramic coverings in practice. Especially in moisture-stressed areas such sealing technique is economical, easy and safe to handle.

Pipe penetrations, well terminals, etc., but also corners make special demands on the seal. Such bodies must be sealed separately separately before sealing surface, since they affect the functioning of the entire sealing measure. So silicone joints are generally not permanent seal, as they are subject to wear (for example, by intensive cleaning), can be solved with time at the edges and allow water to penetrate into the ground.

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To increase the certainty of execution is recommended that generally perform waterproofing combined in two stages. is started in the corners of the room, e.g. in the region of a shower after the floor / wall and wall / wall. Here, it is, elastic and durable bridged with highly elastic plastic sealing tapes that are percarbonate with a fleece backing.

The sealing tapes to embeds in a previously applied fresh layer of the sealing member and passes over it in the edge area again with the liquid film. Existing expansion joints are to be sealed in the same way. Here, a loop is to be formed in the sealing tapes that can accommodate movements.

Sealing the bare concrete floor

Always observe underground

build bathroom itselfEmbodiment of the sealing arrangement in the tub on the floating floor; The operation on mats decoupling is carried out in a comparable manner.

Pipe penetrations must be secured carefully in drywall with a sealing sleeve. The materials to be processed so that they can be seamlessly integrated into the subsequent surface sealing. Sequences are directly embedded into the liquid film. The preparation of the bath and / or shower trays is often done on a bare concrete floor or on the floor.

For the prevention of damage to the surface waterproofing must be carried out under the respective tray. If the tub directly on a raw concrete, the seal must be led up again up to the floating screed. In addition, also the sound insulation has to be bridged. This can be realized only with considerable effort.

In a present raw concrete setting up the tub on the floating screed from the perspective of practicality and sealing technique, the better solution. In this variant, the sealing of the wall portion through joint tapes on the floating floor can be guided and be continued in a plane below the trough to the other in the bottom area.

Depending on the type additional wall brackets for supporting the tub when connected to drywall constructions are required. To avoid noise transmissions special wall sink edge profiles or the use of insulation strips are recommended.

After Additional sealing of the details to seal the entire surface follows. On the dried surface by sealing the ceramic covering is laid with a flexible thin-bed mortar. For grouting of the ceramic coating is colored grouts have asserted that give each bathroom a special touch. The Expansion joints are closed with elastic, fungi and bacteria resistant (fungicide) ausgestatteteten silicone joint sealants.

raise combined seal on the floorFor professionals already in use: Two-component tile adhesive, which also serve as a seal.Floor structure with raised edge stripsOn sensitive surfaces such as wood-beamed ceilings, a decoupling membrane is laid before laying the tiles. Anyway building up the soil sealing: You will (see photo left) as a trough a piece on the wall raised.

process seal on the floor: Tips

Would you like to seal the floor of the bathroom as part of a renovation, you can also Level out this area first. This not only joints in old floor coverings can be concluded with the appropriate mass and a gradient can be created or optimized.

If you do not connect the bottom seal on a sealing tape in the corners of a wall seal, it has created a trough and at least 15 cm high are performed at the walls.

On the ground, you should, if necessary regulate the absorbency of the substrate with a low-base job. As to the wall, the area must also be free of loose particles and separating substances. The painting itself is basically like on the wall - note the in every case exactly the manufacturer's instructions.

Conclusion to bathrooms in drywall

The drywall equipment in bathrooms is also extremely popular with DIY enthusiasts. is connected with the fact that moisture-sensitive gypsum building materials are used as a Substrate for ceramic surfaces, for reasons of easy processing. Modern technology such as the seal in direct bond with ceramic covers provides the necessary protection against moisture damage in the home.

In the application of dry construction, special attention should be paid to the careful training of details. Only then can the wall constructions in the bathroom can securely seal.

Important technical terms for drywall

liquid film
Sealing tapes and -manschetten consist of a highly elastic synthetic rubber, which is applied to both sides of a permeable nonwoven fabric made of extremely durable and resistant polyester. The permeable web is uncoated at the edges to enter the liquid film there with a firm bond. The incorporation of the belts and cuffs at the transition regions is necessary as can occur in these locations movements that can exceed the elasticity of the liquid film and would thus lead to cracking.

Flexible tile adhesive
It is an adhesive which contains various types of cement and plastic shares. With the addition of plastics to cement the adhesive is able to accommodate minor movements without loosen the tiles from the substrate. A further development are the so-called "dispersion adhesive"Which do not contain cement and are based only on plastics.

structure-borne sound
Structure-borne sound is produced when by contact or hitting together of two objects (body) sound is transmitted (eg. B: The beating with a stick to a metal handrail, which may continue over long distances). Airborne noise caused by the reflection of sounds of solid objects (z. B. the echo in the mountains).

Fungicides Silicone Sealants
In ambient air, dust particles, remnants of personal care products and also washed off skin debris and hair that remain after bathing or showering in the corners and can never be completely removed, make ideal food sources for bacteria and fungi. Mineral joint fillers are largely resistant due to the pH-value against a colonization. Silicones must be adjusted only resistant by a fungicidal equipment for a settlement. These fungicidal effect diminishes over time.

Association of German Tile Industry of the Central Association of the German Construction Industry e. V .: Advice for the installation of waterproofing combined with wall and floor tiles for indoor and outdoor use, Bonn May 1997th

Technical Data Sheets Heidelberger Bauchemie GmbH, Brand Bauta

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