Wet Process Fibreboards
Softboard (EN 622-4)
General purpose (for use in dry conditions) SB
General purpose (for use in humid conditions) SB.H
General purpose (for use in exterior conditions) SB.E EN 622-4
Load bearing (for use in dry conditions) SB.LS
Load bearing (for use in humid conditions) SB.HLSa
Low density mediumboard (EN 622-3)
General purpose (for use in dry conditions) MBL
General purpose (for use in humid conditions) MBL.H EN 622-3
General purpose (for use in exterior conditions) MBL.E
High density mediumboard (EN 622-3)
General purpose (for use in dry conditions) MBH
General purpose (for use in humid conditions) MBH.H
General purpose (for use in exterior conditions) MBH.E
Load bearing (for use in dry conditions) MBH.LA1 EN 622-3
Heavy duty load bearing (for use in dry conditions) MBH.LA2
Load bearing (for use in humid conditions) MBH.HLS1*
Heavy duty load bearing (for use in humid conditions) MBH.HLS2*
Hardboard (EN 622-2)
General purpose (for use in dry conditions) HB
General purpose (for use in humid conditions) HB.H
General purpose (for use in exterior conditions) HB.E EN 622-2
Load bearing (for use in dry conditions) HB.LA
Load bearing (for use in humid conditions) HB.HLA1
Heavy duty load bearing (for use in humid conditions) HB.HLA2
Note:- * These boards are restricted under humid conditions to instantaneous or short periods of
loading
