Police department in Grafenau Police department in Grafenau Police deparment in Grafenau

Air-purifying Sound Absorber

"Small but excellent" – this is how the new police department in Lower Bavarian Grafenau with a courtyard for police cars presents itself. The new cubic building is a passive house with aluminium strip window façade and integrates well into a steep slope. The interior culminates in a sound-absorbing and air-purifying acoustic ceiling system from the Emskirchen-based ceiling manufacturer Vogl Deckensysteme.

The new building of the Grafenau police department consists of a compact main and auxiliary building and three courtyards, including one for police cars, which are harmoniously integrated into the steep slope of the property. The office building was designed as a three-band office typology, with a core zone and a safety stairwell, by the Waldkirchen architects ssp planung gmbh on behalf of the Passau state construction office. It is a passive house pilot project of the supreme building authority. Construction period was from April 2012 to February 2014. It has a gross volume of 5,885 m³, a gross floor area of 1,622 m² and a usable area of 962 m², and it extends from basement to first floor to second floor.

Efficient and eco-friendly

The building exterior is fascinating – a so-called passive house aluminium strip window façade with the fibre cement panels below free of thermal bridges. To meet safety requirements, the integrated movable sunscreen is bullet-proof. The energy-efficient building achieves a reduction in CO2 emission by 76% (21.5 t per year). It is heated by a wood pellet heating which can be combined with a solar system.

"The very stringent demands of a certified non-residential passive house, which additionally provides a barrier-free elevator, impose high requirements on the indoor climate", the architect emphasises. Every room is mechanically aerated and ventilated with a heat recovery system. The only exception: the police station is supplied with decentralised air conditioners. Sun protection with daylight control and steering, direct and indirect lighting with light control, as well as room acoustics calculated by a construction physician provide a pleasant climate in the office rooms and hallways.

Type of object: Office and administration building
Vogl products: Vogl Adsorber Panels, Compound Seam
Size: 400 m²
Photographer: Thilo Jaeckel

Completion: 2014
Architects: Architects ssp planung gmbh, Waldkirchen, Passau state construction office
Drywall contractor: Trockenbau Georg Lobenz, Zenting

Acoustic ceiling system with compound seam

On an area of nearly 400 m², drywall contractor Georg Lobenz from Zenting installed a Vogl acoustic design ceiling of 8/18R panels that have a perforated area of 15.5% and are backed with acoustic fleece.

Why this ceiling system? Because it is especially recommended in heavily frequented areas. The perforated panels made of plasterboard are not only a perfect sound absorber and air purifier,but they also satisfy the highest demands of functionality and aesthetics. Not to forget that they provide a great atmosphere to the interior. That is why they are very popular with architects and designers when it comes to individual ceiling design and a pleasant room climate. Benedikt Roos, product manager of the ceiling manufacturer, says: "We deliver our acoustic design panels with the so-called air purification effect, always and at no extra charge."

The Vogl adsorber panel is a plasterboard product that, through a special procedure, has been provided with an additional function for air purification. It allows the Vogl adsorber panel to absorb the air, purify it and release it back to the room. The result is not only improved room acoustics, but also clean room air!

In the question of the joint, the drywaller opted for the traditional compound seam. Once the panels are mounted on a level structure, a cartridge is loaded with the ready-mixed filling compound, and the joints are filled generously. "To achieve high joint strength, a 'mushroom' must form on the back of the two panels," the product manager describes the procedure. But before the compound starts to dry and harden, the drywaller takes the next step: He uses a spatula to remove any protruding material and covers the perforation next to the joint with adhesive tape. Now is the time to refill joints and screw heads with compound or finishing material. Any holes closed with joint compound can be re-opened using a perforation wheel. Not before the joint filling compound has completely dried can this area now be smoothed with a hand-held sander.

The room-closing element thus advances to an absolute eye catcher and increases the value of the building through form, colour and functionality.

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