If the existing insulation is wet, remove the current parts and replace it completely. When building up a flat roof, there are no limitations in mixing different materials.
New additional structure:
- New waterproof roof membrane
- Mechanical fasteners
- Additional thermal insulation: PAROC ROS 30g (grooved) + PAROC ROB 80
- Dry expanded clay
- Old roof membrane
- Old thermal insulation: EPS, Cork, PUR, etc.
- Supporting structure: hollow-core slab