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