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APPLICATION OVERVIEW
Our loft insulation solutions provide the most cost effective insulation solution with regards to the ratio of cost to energy saved as insulation thickness is largely unrestricted, allowing very high levels of thermal performance.
The first layer of insulation is laid between the joists to the same depth as the ceiling joists, with subsequent layers being laid at right angles to the ceiling joists, with all edges butt jointed to prevent thermal bridging and unwanted heat loss.
Take a look around our 3D loft insulation build up
WHY MINERAL WOOL?
Insulating at ceiling level provides the most cost effective insulation solution in terms of ratio of cost to energy saved.
Very low U-values can be easily and economically achieved
Download our Solutions Guide Download our Pitched Roofs Ceiling Level PDF Learn more about fire protection of a refurbished loft floor
Typical U-values
Using Knauf Insulation Loft Roll 40
| U-value (W/m2K) | Thickness (mm) | ||
| Between joists | Over joists | Total thickness | |
| 0.08 | 100 | 400 (2 x 200) | 500 |
| 0.09 | 100 | 350 (150 + 200) | 450 |
| 0.10 | 100 | 300 (2 x 150) | 400 |
| 0.11 | - | - | - |
| 0.12 | 100 | 250 (100 + 150) | 350 |
| 0.13 | 100 | 200 | 300 |
| 0.14 | - | - | - |
| 0.15 | - | - | - |
| 0.16 | 100 | 150 | 250 |
Typical U-values
Using Knauf Insulation Loft Roll 44
| U-value (W/m2K) | Thickness (mm) | ||
| Between joists | Over joists | Total thickness | |
| 0.08 | |||
| 0.09 | 100 | 400 (2 x 200) | 500 |
| 0.10 | 100 | 350 (150 + 200) | 450 |
| 0.11 | 100 | 300 (2 x 150) | 400 |
| 0.12 | 100 | 250 (100 + 150) | 350 |
| 0.13 | - | - | - |
| 0.14 | 100 | 200 | 300 |
| 0.15 | - | - | - |
| 0.16 | 100 | 170 | 270 |
