About
Knauf Insulation Loft Roll 44 Combi-Cut 170mm is an unfaced glass mineral wool roll designed for thermal insulation at ceiling level in suitable cold-roof loft spaces. This full-length variant is 1140mm wide and 7.03m long, giving approximately 8.01m² coverage per roll.
The Combi-Cut format is designed to be separated into 2 x 570mm or 3 x 380mm widths where required, helping installers fit insulation between appropriately spaced joists. The manufacturer's declared thermal conductivity is 0.044 W/mK and its reaction-to-fire classification is Euroclass A1.
The 170mm version provides an additional thickness option for planned loft-insulation layouts and the selected joist or over-joist arrangement.
Plan quantities using the net loft area and any overlapping layers, allowing for cuts and obstructions. Do not compress the mineral wool or obstruct ventilation paths and safety clearances around fittings. Follow the manufacturer's current installation guidance and the overall roof/ceiling specification.
This listing refers to the standard-length Knauf Combi-Cut variant, not the shorter-length or Ready-Cut alternatives. Manufacturer material number: 2404156.
Specifications
| True Thickness | 170mm |
| True Width | 1140mm |
| Length | 7.03m |
| Insulation Material | Glass Mineral Wool |
| Insulation Format | Roll |
| Insulation Facing | Unfaced |
| Insulation Application | Loft |
| Insulation Manufacturer | Knauf Insulation |
| Thermal Conductivity (W/mK) | 0.044 |
| Thermal Resistance (m²K/W) | 3.85 |
| Reaction to Fire (Euroclass) | A1 |
| Pieces per Pack | 1 |
| Pack Coverage (m²) | 8.01 |