FREE DELIVERY - 12 x Knauf Rockwool loft roll insulation 100mm 13.89sm (166.7m²)
Rolls are pre-perforated at 3 x 386mm and 2 x 580mm to allow easy installation between joist centres of 400mm or 600mm. Rolls are installed in two layers, the first layer between the joists and the second layer cross laid over the joists.