providing {TAIL ~ a structure} including framing members and {HEAD ~ a sheath} forming at least one cavity having a known depth 
providing { TAIL ~ a structure } including framing members and { HEAD ~ a sheath } forming at least one cavity having a known depth
OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH