Plywood Bonding Class
Bonding Class - BS EN 314-2
EN 314 -2 is specifically about the bond quality of Plywood.
The three classes represent differences, as opposed one class being better or worse than the other.
This standard specifies the requirements for bonding classes of plywood according to their end uses. It lists three classes of bond quality:
BS EN314-2 Class 1
Dry Conditions
Interior & dry uses
BS EN314-2 Class 2
Humid Conditions
Limited exposure during construction
Protected external use
"Damp" internal use
BS EN314-2 Class 3
Exterior Conditions
Exposure to weather over long periods
Continuous exposure to relatively high humidity
Conditions of Use - BS EN 636
BS EN636-1
Dry conditions with no risk of getting wet
20c and 65% relative humidity
BS EN636-2
Humid Conditions
Protected external use
20c and 85% relative humidity
BS EN636-3
Unprotected Exterior Conditions