Question3
3. What is the U-Value required as from the 1/4/02 to
meet the requirements of Part L when insulation is laid between
joists?
The U-Value required would be 0.16W/m2K. This can be achieved
by laying 100mm of Crown Loft Roll between 48mm x 100mm joists at
600mm centres then cross laying with 170mm Crown Loft Roll.