| Optimising internal living space |
| L1B states that: “Practical considerations with respect to an increase in structural thickness (particularly in terraced dwellings) may necessitate a lower performance target.” |
| The table below sets out U-values that can be achieved using TLX Silver with different thicknesses of PIR or glass wool. |
| PIR 0.023 | glass wool 0.032 | ||||
| U-Value | U-Value | ||||
| thickness | 600 mm | 400 mm | thickness | 600 mm | 400 mm |
| 100mm | 0.16 | 0.17 | 120mm | 0.20 | 0.20 |
| 70mm | 0.19 | 0.20 | 100mm | 0.22 | 0.23 |
| 60mm | 0.20 | 0.21 | 75mm | 0.25 | 0.26 |
| 50mm | 0.22 | 0.23 | 50mm | 0.26 | 0.31 |
