CS13 Tommerupvej 8B. Rehabilitation Workshop in Næstved

The building houses rehabilitation workshops, and it is part of a 35.000 m² complex of buildings, which was erected around 1970 as a centre for mentally disabled.

In spite the rather recent construction, very few relevant drawings of the building and constructions could be retrieved. Informations have instead been gathered on the site.

The buildings were built from prefab concrete elements with 25 mm polystyrene insulation in the outer walls, and typically 100 mm insulation on the roofs. Most buildings have heated basements, or at least crawl spaces, which are cast on site and insulated on the outside with 50 mm hard mineral wool. Windows are wooden with two-layer, air-filled insulating panes.                                                                                     

A pressurization test and thermography showed that the concrete constructions are very air tight. Only leaks are found at the windows and doors.

Ventilation is solely exhaust with no dedicated replacement air openings. One wood workshop has three spot exhausts pulling as much as 700 m3/h, when they are in operation. At these occasions the users of the workshop open a door to the outside.

In some parts of the buildings the users have complained about draught from the windows. With under pressure in the buildings and the leaks mainly located at the windows, this is to be expected.

In neighboring buildings there have been difficulties to even heat them to 20 oC, supposedly because the supply temperature from the district heating plant is being reduced to the lower limit in order to minimize distribution heat losses.