How is life in road construction

Live to live

Located less than twenty kilometers northwest of Koblenz, the small town of Andernach nestles against the gently ramified, calmly flowing Rhine. For the people of Koblenz, Andernach is a good “Vorstube”, for the people living in the densely populated areas of Bonn and Frankfurt, an alternative living option with lots of peace and nature. The second oldest city in Germany has developed over the past few years into a much sought-after residential city that offers everything that is valued and sought in a city - and which has nevertheless remained pleasantly “non-urban”.

City with tradition

The landmark of the city is a 56 meter high defense tower built in the 14th century - the "Round Tower". Its walls, up to five meters thick, withstood an attempt to blow up the retreating French troops in 1689. Even today, buildings made of solid masonry are still extremely popular. However, the focus now is on new standards such as ecological and energy-efficient construction.

The recently built condominiums in Germany's second oldest city are designed to be cross-generational so that residents of all ages can feel comfortable. Two construction phases with 18 residential units each, built in 18 months - it's not just the numbers game that is a well-rounded affair with the new residential complex in Andernach.

Good location on the outskirts

The Buchenstrasse, which runs straight from south to north, is located on the southern outskirts of Andernach. Single and multi-family houses are lined up in a loose sequence on both sides, while on the east side a parallel block of commercial buildings shields the property from an expressway. The slightly trapezoidal, elongated property offers with its shape and size of just under 3,000 square meters an ideal building plot with a variety of building options.

Classic structure with a panoramic view

Rimubal Wohn und Baugesellschaft mbH, based in Andernach, opted for two classic four-in-hand cars that are put together to form an elongated, 50-meter-long block of flats. The two stairwells are on Buchenstrasse, the “chocolate side” with the larger residential units faces west, in the direction of the commercial buildings. These disappear in a terrain jump of up to seven meters, so that there is an almost unobstructed view from the ground floor. From the 2nd floor you rise above the surrounding building stock, on the 4th floor you stand above things and enjoy an undisturbed panoramic view of Andernach and the Neuwied basin.

Instead of the four residential units as in the previous storeys, two penthouses are attached to each side of the two stairwells. This results in elongated apartment floor plans with spacious panoramic terraces on both sides.

For young and old

Living areas of just over 70 to 130 square meters in the penthouse apartments allow for a variety of floor plans. Common to all 2- and 3-room apartments is the combined living / dining area with an open kitchen and a pantry in the hallway. Instead of small, nested rooms, generously dimensioned living spaces are created that, together with the large windows, create an open living atmosphere.

So that these advantages can not only be used by young people, all apartments were designed to be age-appropriate, i.e. barrier-free. This begins with the double garages in the basement, from which one can access the lifts located in the center of the stairwells at ground level. The apartments can be easily reached using the elevator. In the apartments themselves, floor-to-ceiling showers are just as standard as lush balconies, which enable older people in particular to “live outdoors”. This appeals to all generations and also gives younger owners the opportunity to stay in their familiar apartment well into old age.

Natural building material from the region

An ambitious schedule was set for the development of the 2,713 square meter property: 18 months for a living space of just over 3,000 square meters. Two four-in-hand, two construction phases: This solution was obvious, divided the construction project into clear sections and simplified the logistics with regard to the delivery and storage of materials.

In addition to well thought-out planning, building also means taking ecological responsibility. For the two managing directors of Rimubal, Alexander Rimmer and Mario Baldinu, this starts with the selection of the building materials. Your first choice is always the lightweight concrete block. "Pumice is a natural, volcanic rock," says Mario Baldinu. In addition, he adds: “We are in the middle of a mining area.” The naturalness of the building material and the proximity to the site were the two main arguments in favor of the lightweight concrete block.

For every requirement

the right stone

Ceilings are usually a domain of reinforced concrete, but opinions are already divided when it comes to the exterior walls: thermal insulation composite system (ETICS), single or double-shell, brick, sand-lime brick or lightweight concrete - to name just a few variants. With regard to the realization of this multigenerational house, the Rimubal company clearly opted for KLB functional walls.

For Alexander Rimmer, there are several reasons why bricks from KLB-Klimaleichtblock (Andernach) are used for both the inner and outer walls: “We have already worked with other manufacturers, but in terms of quality, dimensional accuracy and technical advice KLB is the first choice for us. "

In addition, KLB produces in the immediate vicinity, so the component of "gray energy", which is important in the ecological balance, can also be rated positively. It was planned in KLB air-conditioned light blocks - all around, inside and outside.

Building in a system: simple - safe - economical

"Such a lightweight concrete block can be cut exactly to size quickly, but we prefer a block that already fits," says Alexander Rimmer. For him, the depth of the manufacturer's range is a decisive criterion for the economically and technically clean implementation of an architect's design. And here KLB was able to score: Plane stones, air-conditioned light blocks and supplementary products - the range is clearly structured; These advantages have been supplemented by an extensive technical aid organization and personal specialist advice.

KLB-Plan solid bricks were used for the load-bearing walls in the basement, which were subject to high compressive stresses, the acoustically demanding apartment and house partition walls and the elevator shafts. If less load-bearing capacity is required, but quality is still important, KLB plan hollow blocks are the first choice. They are significantly lower in weight, thus reducing the load on the lower floors and also offering a high level of living comfort.

Last but not least, the flat surfaces and thin horizontal and butt joints enable an economically efficient application of plaster, which significantly reduces the amount of water introduced during the construction phase. As a result, the masonry of the apartment buildings dried out faster and the construction time - as planned - could be kept short. The apartments were ready for occupancy in mid-2016.

Quality aroused buyers interest

The apartments were all sold quickly - because of the good location and the convincing arguments in the construction. Execution in accordance with the requirements of the KfW standard (EnEV 2009) is helpful for financing. The essential component for this is high-quality triple insulating glazing with a UG-Value of 0.6 W / (m²K).

The building is energetically optimized by decentralized ventilation systems with heat recovery of up to 90 percent in each apartment. Underfloor heating with individual room control complement the energetic concept. A cogeneration unit, which is operated with fossil fuels and located in the basement, produces heat and electricity at low cost. All of these measures support the experience, which Rimubal says is irrevocable: quality pays off.

KLB-Klimaleichtblock GmbH

Dipl.-Ing. Peter Gahr