A new era has begun in wet-room design

The building of wet rooms is subject to standards and regulations set by the Ministry of the Environment, and the related guidelines and recommendations. A wet room must be constructed in accordance with good building practices. The regulations apply to individual bathroom renovations, as well as more extensive pipe renovation or new build projects. The decree of the Ministry of the Environment on the effectiveness of moisture control technology in buildings has set tighter moisture control regulations for construction projects.
Wet rooms are a crucial part of construction projects. The decree, which came into effect on 1 January 2018, includes special provisions to ensure that their moisture control technology is correctly and successfully executed. This new decree and other amendments to the Land Use and Building Act require tighter risk management and more detailed design documentation and detail drawings for wet rooms.

The general regulations and guidelines include minimum waterproofing requirements and waterproofed surface structures, for example. Of course, separate agreement can be made for the achievement of even higher quality goals. Regulations and construction techniques applicable during the renovation phase, and the correct way of realising wet-room designs, should also be checked.

The regulations also apply to the product development and manufacture of waterproofing systems. Waterproofing systems must be certified, i.e. tested as systems, in Finland. ETA (European Technical Assessment) is a type of international certification, based on which CE marks can be sought for tested waterproofing systems. This means that CE markings cannot be granted for individual waterproofing agents or materials. The ETA is based on the assumption that a wet room will be used for 25 years.

All of Kiilto's waterproofing systems have been certified and awarded the CE mark. In addition, they all have the:

  • Key flag
  • the option of designing an entire wet room that fulfils the M1 emission classification for building materials
  • the option to design them for locations that meet the LEED certification criteria
  • the option of designing a wet room for facilities granted the NORDIC SWAN
  • the option to interconnect different wet room systems at the point where the floor meets the wall (see Detail Drawing VE37). The Kiilto KeraSafe system can also be connected to Kiilto's other waterproofing systems at vertical corners of walls (see Detail Drawing VE37).

Kiilto waterproofing systems:

  • Kiilto KeraPro – Fast, one-component, orange, also suitable for air leakage repairs
  • Kiilto Kerafiber – Traditional, one-component, turquoise
  • Kiilto Keramix A+X – Fast, two-component, cementitious, frost-tested, grey, also suitable for air-leakage repairs
  • Kiilto KeraSafe Speed – KeraSafe+ fabric-based, fast to install and highly impermeable to water vapour

Wet rooms should be designed with care

When designing a wet room, take note of the material manufacturers' working instructions as well as regulations and guidelines. Use the detail drawings and compare different waterproofing systems carefully before choosing between them. The designer must ensure that the materials and methods used have been approved, and check the available quality assurance documentation.

Kiilto's range of waterproofing systems include the right solution for your location. If the site is challenging or you want to optimise the time used, you can opt to combine various Kiilto waterproofing systems in a wet room. We have tested all our systems for overlapping use: designers can compare the benefits and features of each application and system, and choose the best solutions for the wet room in question.

All Kiilto waterproofing systems can be used in both public facilities and private wet rooms. You can use an intuitive table, in which we have listed systems and their features in the same rows, to compare systems. To find the table, go to 'Waterproofing systems' in the Wet rooms folder of the document bank. The table can also be read via our website on mobile devices, or printed out in A3 size.

The design of wet rooms is part of building design

Designing a substrate for waterproofing is one of the keys to success when working on wet rooms. Designers should ensure that capillary moisture is under control and check how moisture control works in the structure. The substrate should only be waterproofed once you are sure that the structure is not subject to capillary action. The substrate must be sufficiently durable. Designers can use our detail drawings to check on the required issues and ensure that the substrate is suitable. Take account of the substrate during the design phase: it is best to present the related requirements in the detail drawing. You can use Kiilto's conceptual detail drawings to design wet rooms on site, including those where the Kuivaketju-10 model is applied. (See our Document bank, wet rooms, detail drawings.)

Take account of the product selection. In Kiilto detail drawings, we have listed the products belonging to each system product range. By using the products listed in each drawing, you can ensure that your certification concept is realised and only the right, tried and tested products are included in the design. Selecting products only after the design phase enables the most suitable alternatives, which best match the user's preferences, to be chosen from the detail drawing, for purposes such as levelling and filling. The contractor can explore suitable alternatives from the detail drawing and, for example, circle the detail drawing, recording the document in the design material.

The Kiilto Pro Design page has been designed for easy information retrieval. The page has a clear document download folder, which includes the full range of documents needed for the design of wet rooms and as design attachments. Full data packages are easy to download, whether or not your location is based on the Kuivaketju10 operating model. We do not advertise on the design pages. We provide information on wet rooms, indoor air design, topical issues, and research findings relevant to design and its implementation. For wet rooms, we have created a complete package for system comparisons, design, and for facility maintenance. Download this to obtain manual maintenance material for your preferred system, and instructions on waste disposal and user guidance. Select the 'Wet rooms' folder to save these for your own use from the document bank. Click on the 'Select all' box, download your preferred documents separately, or browse and view the documents in the window without opening them. Detail drawings are available for each system as PDF documents, with all systems (all detail drawings) in a single dwg-format image, or as separate PDF attachments. Use the detail drawing list to view the detail drawings available for selection.

Document bank - wet rooms.

Designers - Participate in supplementary training and save time

Kiilto has begun supplementary training on the design of wet rooms. This intensive half day of training is intended to provide designers with the latest information.

A wet room is not a space which can be designed in the same old way as before! The responsibility of designers is growing, and we want to prevent possible conflicts during the lifecycle of wet rooms by efficiently providing topical information for use by designers.

Now is the time to get on board. We do not train designers in design work – we provide information on topical and new issues that designers need to know in order to keep up to speed and create solid, successful solutions.
During training, we also gather information from you, the designers. It is important that we can develop our operations in the right direction. For this, we need practical information and experiences of how the latest regulations and practices unfold. We want to develop and we believe that a well-built wet room is the result of a successful combined effort from all of the parties involved.

We have gained amazing experiences from our training. Feedback suggests that the participants have profited from exchanged experiences and, for example, that public officials would like designers to take part. Participants must sign up for the training individually, to enable us to book the venue and catering.

You are warmly welcome!