Many homeowners are inspired by the wonderful designer furnishings from bathroom & sanitary brochures. To ensure that the bathroom looks and functions, thorough planning and careful execution are essential when it comes to building and designing the bathroom.
Technical requirements for the bathroom
From a building physics point of view, the bathroom is exposed to the highest demands. In the worst case, water and humidity could cause considerable damage to the building (water damage, mold, etc.).
Of course, generally recognized rules of technology must be observed for the execution. Yet every bathroom looks different. Depending on taste and ideas, a homeowner would only like a toilet and a small hand wash basin with a cold water connection in a small sanitary room and a huge “wellness oasis” with all the extras in another room.
These plans should be made for the long term. Floor plans should be drawn up beforehand and, if necessary, the desired facilities should be specifically entered. Then the connections for cold water, hot water, and wastewater must first be planned. In the case of existing buildings, it is advisable to adapt the planning of the facility to the existing connections.
Consideration of the building physics in the bathroom
In the bathroom, higher levels of exposure to water and water vapor are usually possible. For this reason, all building materials in the bathroom must be able to withstand higher levels of moisture. This means that wood-based materials or building materials containing gypsum without special moisture protection are unsuitable for walls and floors.
These building materials would swell over time and lose their strength. It should also be noted that tiles are not necessarily sufficient as a “protective measure.” In particular, the joints are not waterproof and diffusion-tight, and so the water could get onto the gypsum-containing substrate if there is a corresponding moisture load. In the long term, the damage would be inevitable.
It goes without saying that the bathroom must be planned in such a way that the excess room air humidity (and the resulting smell) can be quickly removed by ventilation, and the bathroom can be heated up again quickly (and comfortably). This does not necessarily mean electric underfloor heating.
Incidentally, excess room humidity always looks for the coldest point to condense. This fact is particularly important in older (and uninsulated) buildings. After showering, the water condenses on the window panes, on the mirror, and, in the worst case, on the corner of the outside wall. In the latter case, mold could develop in the long term.
In addition, the (liquid) water must also be able to be transported away again quickly. This means that there is a corresponding gradient in the relevant areas. This applies, for example, to tubs and tub connections, washbasins, etc. Especially in the joints, the water must not have a chance to linger longer. Otherwise, these joints would represent an ideal, moist, warm breeding ground for mold.
Concrete tips for planning
A bath is often planned for a lifetime. Do you know that? Initially, a hand basin and toilet and maybe a small shower is sufficient in the bathroom. A bathtub and individual bath accessories are to be added later. … and years later, the bathroom may have to be converted to make it suitable for the elderly, which is very costly …
Equipment – design & functionality
As soon as the planning of the plumbing, heating, ventilation, and electrical installation has been completed, the bathroom can be equipped according to personal requirements. Online portals specializing in sanitary products offer more than just an initial orientation. For example, you can very quickly compare different models of washbasin fittings online in order to find the right model for you. Online portals not only have an extremely large selection (which is usually not found to this extent in the hardware store) but also offer an overview of the expected costs at the same time.