Apex domains cannot have CNAME records.
Question and response
Question
dig owenscorning.com. NS
Answer
owenscorning.com. 5 NS ns4.owenscorning.com.
owenscorning.com. 5 NS ns3.owenscorning.com.
owenscorning.com. 5 NS ns1.owenscorning.com.
owenscorning.com. 5 NS ns2.owenscorning.com.
owenscorning.com. 5 NS ns6.owenscorning.com.
owenscorning.com. 5 NS ns5.owenscorning.com.
Authority
The response has no authority records.
Additional
ns1.owenscorning.com. 5 A 205.204.1.147
ns2.owenscorning.com. 5 A 205.204.2.143
ns3.owenscorning.com. 5 A 205.204.12.21
ns4.owenscorning.com. 5 A 208.94.148.13
ns5.owenscorning.com. 5 A 208.80.124.13
ns6.owenscorning.com. 5 A 208.80.126.13
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0