They are specially designed boards for thermal insulation, fire protection, and sound insulation, suitable for applications such as:

• In the intermediate gap of horizontal structural elements such as: Suspended ceilings of dry construction (e.g., plasterboard, mineral wool, metal, wood).
• On top of a horizontal roof under tile roofing.
• Between the rafters or beams of wooden or metal roofs.
• Between the battens of wooden and raised floors.