Object report – Waterproofing in flight


Sealing in flight

Tile laying systems from
Botament for alpine refuge

Modernization at an altitude of over 2,000 meters: A refuge in the Lechtal Alps has now been extensively expanded and refurbished. In the kitchen as well as in the sanitary facilities of the extension, Botament’s waterproofing and tiling systems were used as a durable and qualitative solution. After completion of the measure, the refuge with its modern equipment offers guests a comfortable overnight accommodation on their way through the mountains.

In the Alps there are numerous refuges that offer hikers or mountaineers shelter and protection from the elements. At 2,042 meters above sea level, in front of the Heiterwand north walls, is the Anhalter Hütte – a managed refuge built in 1912. It belongs to the Upper Neckar Section of the German Alpine Club and is connected to the Austrian Long Distance Trail 01. The Anhalter Hütte offers above all seclusion. Neither a paved road nor a passenger or material ropeway leads up there. Therefore, the delivery of basic supplies takes place once a season by helicopter. Everything else must be carried up on foot.

Contemporary modernization and expansion

In the past decades, the quaint old building has been rebuilt and renovated several times. Due to increasing numbers of overnight stays, for example, it received an extension in 1975. Over time, the windows, the energy system and the sewage system were also renewed. The most recent measures consisted of a general renovation of the refuge. The exterior and interior of the original hut were renovated in consultation with the Office for the Protection of Historical Monuments, the annex from 1975 was demolished and a replacement building was erected in its place. Furthermore, an outbuilding was created, which houses the winter room as well as the building services. In the replacement building there are simple and cozy dormitories, the sanitary facilities and the kitchen with storage rooms. Despite its modern architectural language, the shingle-clad new structure harmonizes pleasantly with the listed original cottage. The new energy system, consisting of a cogeneration plant powered by rapeseed oil, a PV system and a battery system, supply the hut with electricity and heat. With the opening of the pass road, the Hahntennjoch, in May 2019, the construction work could start.

Resilient kitchen environment

With the general renovation, the hut was made structurally, functionally and structurally fit for the next decades. The cozy guest room and bedrooms, ranging from twin rooms to 10-person dormitories, can accommodate 80 hikers. A modern and perfectly equipped gastro kitchen allows the tenant couple to work professionally at over 2000 meters. Already numerous guests were inspired by the culinary offer. Botament’s waterproofing and tile installation systems ensure the high quality and durability of the space: the company’s “AE Waterproofing and Decoupling Membrane” was used underneath the new tiles on an area of 90 square meters. The elastic composite waterproofing is suitable for wall and floor surfaces and especially for waterproofing commercial kitchens exposed to heavy loads of water and chemical substances. In this context, the product has been tested for water exposure classes W0-I to W3-I and exposure class C. The waterproofing also allows for quick and easy installation. The tiles were then applied to the substrate with the fiber-reinforced adhesive “M 21 HP Speed”. Butt joints, inside and outside, were sealed with the transversely elastic “SB 78” sealing tape, fleece-laminated on both sides, and the associated molded parts from Botament. For the tile backsplash, the client opted for a white tile with a rectangular format. Botament’s multifunctional grout “Multifuge Fine” was used here to create the narrow joints accurately and to a high standard. The grout is particularly characterized by its fine and smooth surface and rounds off the visually appealing overall appearance in a light gray tone. The room looks clean and friendly and is also easy to clean thanks to the smooth and dirt-repellent surfaces.

Elegant sanitary facilities

For the sanitary facilities, also located in the new building, the task was to lay wall and floor tiles. For this purpose, Botament’s “BP Bauplatte” was first applied in the lower wall area. The carrier plate is made of extruded polystyrene foam. It is waterproof and therefore particularly suitable for damp rooms. Another proven product from Botament for large-format tiles, the lightweight tile adhesive “Multistar”, was used for the installation of the wall tiles. Thanks to the special Airflow Technology, this can be processed easily and smoothly. The flooring was laid with the fiber-reinforced and highly flexible fluidized bed adhesive “M 30 HP S2”. This is particularly suitable for tiling on young substrates and can also be used on heated surfaces. In the area of the showers, the walls were also bonded with the “AE waterproofing and decoupling membrane”. The surface chosen was a large-format tile in a shade of gray. This gives the sanitary facilities a modern character – and at the same time harmonizes with the warm wooden surface that characterizes the upper wall area of the sanitary facilities. The joints in a light shade of gray are color-coordinated with the overall concept. The same system structure – consisting of BP Bauplatte, Multistar and tiles of the same color – was also used in the entrance area of the building. Furthermore, “D1 Speed” was used throughout the project as a primer for absorbent and non-absorbent substrates. MD 1 Speed” waterproofing was also used to bond the sealing strips. Lindinger Armin Thieringer e.k. from Zimmern was responsible for the speedy and professional execution of the sealing and laying work.

“Due to the difficult accessibility, the general renovation of the refuge required more effort than is the case with comparable contracts. For example, all building materials had to be delivered by helicopter. This also affected the waterproofing and tiling systems from Botament,” explains Lars Zschaler, Area Sales Manager at Botament. It was an advantage that Botament was able to supply the entire product range – from building board to waterproofing and grout – for the execution of the sanitary facilities and the kitchen from a single source – and also ensured intensive consulting and support for the measure. This provided planning security. The well thought-out logistics and the close coordination between the project participants formed another essential prerequisite for the success of the construction project. Thus, the new building was successfully realized in less than 5 months and in August 2021 again welcomed and entertained the first hikers.

Construction panel:
Building project: Anhalter Hütte, Imst, Austria
Client: German Alpine Club, Upper Neckar Section, Rottweil
Architecture: Christof Birkel, Rottweil
Manufacturer waterproofing and tiling system: Botament GmbH, Bottrop
Tiling and waterproofing work: Lindinger Armin Thieringer e.k., Zimmern
Construction period: 07.2019 until 07.2021
Execution period tiling and waterproofing works: 09.2020 to 10.2020

At over 2,000 meters, an alpine refuge was modernized.

Due to the special location of the hut, the materials were delivered by helicopter.

Botament’s waterproofing and tile installation products were used in the over 2,000-meter construction project.

Botament’s “AE waterproofing and decoupling membrane” was used under the tiled floor in the kitchen.

Easy to clean: In the kitchen, the decision was made to use a white tile with a rectangular format.

SB 78″, a transversely elastic sealing tape from Botament with fleece lamination on both sides, was used to seal the butt joints.

Under the gray tiles in the sanitary facilities, as well as in the entrance area, the “BP construction panels” were installed. The lightweight tile adhesive “Multistar” forms the substrate for the tile covering.

The modern gray tiles harmonize with the warm wooden surface in the upper wall area.

The shower area was waterproofed using Botament’s “AE waterproofing and decoupling membrane”.

In the sanitary rooms, a large-format tile in a gray tone was chosen for the wall and floor.

The stone wall of the existing structure was pretreated with the primer “D1 Speed” for the subsequent application of the plaster.