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home » performance characteristics: hardwoods »
All Longden doors are manufactured from correctly seasoned hardwood.
The density of timbers varies depending on the species and moisture content. The asterisk indicates that the density can vary more than 20%. For FD60s the density needs to be a minimum of 530kg/m3 excluding Ash and Iroko. Use of Beech is not recommended by Longden.
Moisture content for internal doors and doorsets is recommended to be 10% + - 2% and for external doors and doorsets 16% + - 3%.
Timber Species
Density (kg/m3)
Suitable for external use
Max Fire Rating
FSC Availablity
Ash American
670*
No
FD30
Yes
Ash European
710*
No
FD30
Yes
Cherry American
580
No
FD60
Yes
Iroko
660
Yes
NR
Yes
West African Mahogany
530*
Yes
FD60
Yes
Rock Maple
740
No
FD60
Yes
European Oak
720
No
FD60
Yes
American White Oak
770
No
FD60
Yes
Sapele
640
Yes
FD60
Yes
Tulipwood
510
No
FD30
Yes
Utile
660
Yes
FD60
Yes
American Black Walnut
660
Yes
FD60
Yes
French Walnut
670
No
FD60
Yes
Oak American Red
770
No
FD60
Yes
Movingue
680
Yes
FD60
Yes
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