The insulation system includes {HEAD ~ insulating boards} which are suspended beneath {TAIL ~ roof panels} by flexible sheets of material 
are suspended beneath
The insulation system includes { HEAD ~ insulating boards } which are suspended beneath { TAIL ~ roof panels } by flexible sheets of material
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH