Making a bathroom in a wooden house

The specificity of a wooden house makes its own adjustments to the organization of the bathroom space. The behavior of wood in contact with moisture is taken into account, the problem of absorbing odors and other points related to natural material is solved. In the article, we will talk about the features of toilets in log cabins, we will tell you how to make communications and decorate.

Nuances of location

In a log house, a house made of timber or rounded logs, the location of the bathroom is included in the project even before the construction of the building. It is necessary to know in advance where the communications will be connected, whether an additional toilet is planned on the second floor. When choosing a place for a bathroom and toilet, the following points are taken into account.

  • If the building has several floors and only one bathroom is planned, it is located below.
  • If several toilets are expected in a 2-3-storey building, they are built on top of each other, so it is easier to carry out communications.
  • The presence of a bathtub on the second floor, especially of large sizes, is possible only with reliable strong ceilings, otherwise they will have to be strengthened, since a volumetric container filled with water creates a large load on the floor.
  • On the ground floor, the place for the plumbing room is chosen closer to the main exit and not far from the kitchen in order to concentrate the plumbing system in one place.
  • On the second floor, in the presence of rooms for different purposes, for the convenience of use, the toilet is equipped next to the bedrooms.

When choosing a place for a bathroom, its dimensions are taken into account, whether it will be combined or separate, where the exit and plumbing will be located.

We suggest in the figure to familiarize yourself with the diagrams of different types of this room..


When installing communications in a log or log cottage, you need to take into account the peculiarities of the wood material, which easily absorbs moisture and odors. After the construction of the house, the wood naturally dries out, stretched for a long time, in connection with which there is a significant shrinkage of the building. When equipping a bathroom in a log house, you need to pay attention to the following points.

  • Until the structure is fully stabilized and shrinkage continues, pipes and plumbing fixtures should not be installed close to walls. In addition, wood must “breathe”, so in any case, it should not be in close contact with anything..
  • For communications in wooden houses, it is necessary to use plastic pipes and clamps with rubber gaskets. Condensation forms on metal products, which adversely affects the condition of the wood. This is another reason why you should not place communications close to walls..
  • Wood is susceptible to decay, so all systems associated with the movement of liquids must be as reliable and well-assembled as possible in order to avoid leaks. This is the case when saving on plumbing equipment will be more expensive..
  • A frequent problem of toilets located on the first floor of wooden houses is freezing of pipes near the ventilation duct. Pipes can also freeze on underwater routes. At low temperatures, the toilet flush may cool down. To avoid trouble, it is necessary to insulate the sewer system indoors and outdoors. External pipes are insulated and deeply buried in trenches during installation. For internal insulation of communications, the arrangement of a warm floor in the bathroom will also help.

For wooden houses, it is important not only to properly equip communications, but also to create a reliable, well-functioning ventilation system..

It will help to remove hot and cold vapors, quickly dry the room, prevent wood from rotting and the formation of fungus and mold on the walls..

Air exchange can be normalized due to the flow of air from the rest of the house.. For this, a gap should be provided between the floor and the door in the bathroom. Air should leave the room and house through the ventilation hole located in the upper corner of the wall opposite the doorway.


In a room saturated with vapors, porous wood absorbs and releases moisture constantly. This can affect the stability of the structure of the entire house.. To avoid harmful movement, the bathroom is built on a sliding frame, that is, on a special metal profile that allows you to keep the problem room offline.

But this construction technique does not free the plumbing room from the need for waterproofing.. On the contrary, it is the only possible solution for a wooden house that allows you to protect the premises from the damaging effects of moisture..

The following is used as waterproofing.

  • Roofing material – paper-based material is inferior in strength to modern products, so today it is not used often.

  • Roll product, created on the basis of glass fiber, is actively used for waterproofing.

  • If the house has not gone through complete shrinkage, the walls are left unfinished, log. To protect them from moisture, antiseptic and water-repellent mixtures are used, which create a protective film on the treated surfaces..

  • In a building that has passed the shrinkage period, before doing finishing work, roofing material or fiberglass is laid between the wooden wall and the finish.

  • Protect the floor with a waterproof underlay, on which materials that are not afraid of moisture are installed, or a concrete screed is made under ceramic tiles.

Finishing options

In the first year after the construction of a wooden cottage, finishing work cannot be carried out, since shrinkage will destroy the decorative coating of all surfaces. The drying period for each building is different, for example, houses made of laminated veneer lumber take a little time.

The longest period of shrinkage, stretching over years, is the structure of solid logs. In such buildings, interiors are created taking into account the log walls, treated with protective mixtures, stain, paints.

For a house that has already undergone shrinkage, there are no restrictions in the decoration, materials of any kind are selected.


To make wall decoration in a wooden house, a frame made of a metal profile is installed on a log surface. A moisture-resistant drywall is mounted on the frame, which becomes the base basis for any finishing material. For the walls in the bathroom, you can use the following types of finishes.


A very beautiful design technique for one wall or part of it.

Mosaic visually expands the space and attracts the eye. Particularly good solution for small rooms.

Ceramic tile

Tiles have excellent water retention and are the most popular materials for decorating plumbing rooms. Its reliability is especially important for a wooden house. Products are produced in different sizes, with a huge selection of patterns and colors.. The tile tolerates temperature fluctuations well, it is easy to care for it.


Slabs made of natural stone look very beautiful, but they are heavy, so they are used fragmentarily in wooden buildings..

A lighter material is a finishing artificial stone, which is mounted on the walls with small bricks..


A good solution for finishing a bathroom would be to paint the walls assembled from drywall with moisture-resistant paint. It looks good on surfaces, does not allow moisture to pass through, and is easy to clean. With the help of a mixer and computer programs, some stores can find the perfect color for your sanitary room..

Decorative plaster

To create a classic interior in a large combined bathroom, decorative plaster is suitable. It can be smooth, corrugated or have a silk effect, but the main thing is that the finish is applied to a moisture-resistant protective shell covering the walls..

PVC panels

Lightweight, washable, inexpensive material, good moisture retention.

Choose from wood or stone finishes.

Natural wood

Natural material is used in the form of lining or slabs made from hard plant species such as cedar, oak, beech, larch. Products are covered with an antiseptic, they are water-resistant and become suitable for decorating walls in bathrooms and toilets. Lacquer or wax is chosen as a protective layer. Wood trim looks organic among the log walls of the house.


Before finishing the floor, you need to make preparatory work. In wooden houses, they are somewhat different from screeds of stone buildings.. Moisture-resistant plywood is laid on the rough floor, primed, the seams are treated with a sealant. Roll waterproofing is covered on top (with an overlap and with a slight rise on the walls).

Then a damper tape is mounted around the perimeter of the walls, it resists rigid fixation to vertical surfaces, thereby providing the floor mobility necessary in wooden buildings.

The screed is poured in a thin layer, no more than 3 cm, fiberglass mesh is used for shock absorption.

“Floating” screed does not allow the finishing flooring to deform and collapse during shrinkage processes.

The floor is mounted with a slight slope so that water does not accumulate under the bathroom, but falls into an accessible place for cleaning. Sometimes a drain outlet is arranged in this place.. The following materials are selected as finishes.

  • Solid board. They turn to this type of finish when they want to preserve the wooden structure and the warm natural energy of the house. Choose a material with waterproof protection. If a solid board is installed, the screed is not done. “Floating” logs are mounted directly on the waterproofing (not attached to the walls). So that they do not diverge from each other, transverse bars are used for fixing, then the coating is laid. It is better to choose larch as a finishing wood, it is not afraid of water and becomes only stronger over time.

  • Laminate. A moisture-resistant parquet board or laminate is chosen with locks, they are laid on a screed. Then the seams are treated with water-repellent mastic..

  • Tile. It is more practical to use ceramic tiles as a covering. There is a huge assortment on sale, you can always choose a suitable option in color and style. The tile is mounted without bringing 1.5-2 cm to the walls, the gaps are compensated for with baseboards.


Considering the shrinkage of a wooden house, a “sliding frame” made of metal profiles is used for the ceiling cladding. Plasterboard is mounted on it, which becomes the basis for any finishing materials. It can be painted, decorative plaster can be used, tiles can be glued or PVC panels can be installed.. Stretch ceilings are often used in combined bathrooms..

Communication elements are easily hidden under all these suspended structures..

Beautiful examples

We have prepared for you a selection of beautiful plumbing rooms suitable for wooden houses.

  • The bathroom is decorated in the style of modern classics.

  • Cozy ageless provence.

  • Country direction in a room of a cottage from a bar.

  • Loft in a wooden house.

  • High-tech attic bathroom.

  • Rustic impresses log buildings.

About the author