Lightweight mineral wool loft insulation.
Designed for use in between and over joists within loft spaces.
ROCKWOOL ROCKPRIME® is an energy and cost-efficient blown loft granulate that is mechanically installed, offering a speedy alternative to typical loft roll insulation with minimum disruption to occupants. It is made from sustainable volcanic rock and is impervious to air movement within the loft space.
Features and benefits:
The U-values shown in the table below are based on a loft space with joists that are 100 mm in depth:
280 mm; 300 mm; 320 mm; 350 mm; 400 mm; 450 mm.
P10/10 Loft insulation
P10/150 Blown loft insulation
BS EN 14064.
Thermal conductivity (maximum)
Euroclass A1 non-combustible.
Installing blown or loose laid loft insulation.
Blown density (nominal)