In transformations and renovations, every project is different. Important aspects to be mapped out in advance include the structural and logistical possibilities, but also the requirements for sound insulation and fire safety. These aspects determine the choice of the right building system.

Lightweight solutions: topping up

Topping up is adding one or more building layers to an existing building. Especially in (inner) urban area development, topping up is an excellent way to enlarge (infill) or improve an existing building. Because a top-up uses the load-bearing capacity of the existing building, a lightweight construction is required. An aerated concrete building system of lightweight aerated concrete floor slabs, hull panels, separation panels, lintels and roof panels, is a solution that meets this requirement. The fire-resistant, heat-accumulating and moisture-regulating properties of aerated concrete distinguish this system from other solutions such as timber or steel frame construction.

Post-insulation

Even for post-insulation of existing buildings, there is the right solution with a lightweight aerated concrete variant. This material lends itself perfectly to insulation from the inside and can easily be applied to the inside of walls or underside of floors and roofs and can be finished immediately. The material prevents moisture problems in the structure.

Raising a hotel with an AAC building system

Renovation challenge

Due to increasing demand for hotel rooms, the existing accommodation of hotel Van der Valk in Nieuwerkerk aan den IJssel (Netherlands) had become too small. The hotel therefore wanted to expand the number of rooms, suites and meeting rooms but the surrounding space was limited.

Solution

The existing building was topped up with an additional floor. The shell of the toppings was composed entirely of aerated concrete floor slabs, hull panels, separation panels, lintels and roof panels. The architect specifically chose aerated concrete because he wanted a stony, non-combustible, heat-insulating and -accumulating material that is, above all, light.