| MEAN TEMP|R-VALUE (h-ft²-°F/BTU) | 3″ | 12-29 4″ | 18-62
 5″ | 25-32
 6″ | 31-85
 | 2″ | 14-16 2.5″ | 19-38
 2.75″ | 21-28
 3″ | 23-58
 4″ | 30-86
 5″ | 37-88
 6″ | 44-64
 | 2″ | 14-16 2.5″ | 19-38
 2.75″ | 21-28
 3″ | 23-58
 4″ | 30-86
 | 2″ | 14-16 2.5″ | 19-38
 2.75″ | 21-28
 3″ | 23-58
 4″ | 30-86
 5″ | 37-88
 6″ | 44-64
 |