{HEAD ~ The insulation system} utilizes {TAIL ~ a suitable insulating material} and a vapor barrier which protects the insulating material from moisture penetration and provides an attractive ceiling appearance 
utilizes
{ HEAD ~ The insulation system } utilizes { TAIL ~ a suitable insulating material } and a vapor barrier which protects the insulating material from moisture penetration and provides an attractive ceiling appearance
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH