The insulation of a pitched roof at rafter level (warm attic) enables maximum utilisation of roof space in both new and refurbished residential and non-residential buildings. Even if the attic is not immediately intended for use, converting an unused, cold space at the top of your house into a warm, comfortable living space later is a relatively simple and inexpensive task.

Building new rooms in a cold attic often requires a building permit. The height of the available space determines the insulation thickness. When planning the insulation solution, ensure sufficient ventilation. Also consider insulating the floor of the attic for increased sound insulation. When fitting the insulation, ensure air tightness in order to prevent cold bridges and condensation. Approximately 450 mm of insulation is recommended for the roof ceilings of new low-energy houses.

Non-combustible PAROC stone wool between the rafters also improves the acoustic performance of the roof. By following Paroc's instructions, and adapting them to your building if necessary, you can easily perform the work by yourself.

Roof trusses, warm attic
  • Spacer / PAROC WAS 25t 
  • PAROC eXtra
  • Vapour barrier
  • Plaster board

Basics of building a loft room:
  1. As tight inner surface as possible 
  2. Wind protection in the wall surface and in the sloping part
  3. Ventilation gap 50–100 mm
  4. Proper ventilation on the ridge