{HEAD ~ An insulation system} 10 for insulating {TAIL ~ the roof} 12 of a metal building is shown in FIG 1 
for insulating
{ HEAD ~ An insulation system } 10 for insulating { TAIL ~ the roof } 12 of a metal building is shown in FIG 1
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH