Cross section of outside walls

The wall construction is as follows :-

  1. T &G planks – WRC  (19mm x 225mm x Random)
  2. Treated softwood battens – vertical-38x25mm
  3. wall membrane
  4. OSB sheathing – 11mm
  5. CLS Stud – 89mm
  6. OSB Web – 300mm high pieces attached to studs @ 900mm with a depth of 330mm
  7. CLS Stud – 63mm
  8. CLS 63mm horizontal @600mm spacings
  9. Vapour control membrane
  10. OSB 18mm
  11. Fermacell -10mm

Space from 4 to 9 will be filled with insulation giving a U value = 0.1

At the base the outer studd will sit on a masonary wall and the inner on the concrete raft.