The American Wood Protection Association (AWPA) using a visual rating scale to grade termite damage to wood
|
Severity of Attack
|
Wood Status
|
Scale
|
|
none visible
|
sound
|
10
|
|
trace (surface nibbles allowed)
|
|
9.5
|
|
slight
|
|
9
|
|
moderate
|
|
8
|
|
moderate to severe
|
|
7
|
|
severe
|
|
6
|
|
very severe (50 to 75% of cross-sectional area affected)
|
|
4
|
|
complete destruction
|
total failure
|
0
|
