Forestry Certification

Radial Timber is committed to the sustainable management of our timber resources. All Radial timber products are supplied through PEFC certified partners. PEFC forest certification provides a system to guarantee the sustainable management of our forests and to ensure that all products reaching our customers have been sourced from sustainably managed forests through a certified standard and chain of custody. 

Species Data

All timber species sawn by Radial Timber for external applications and requiring natural durability are selected from regrowth Eucalyptus species ranging in durability from Class 1 to 2 (NOTE: this is the same durability class as Western Red Cedar and Jarrah). Wherever possible, Radial Timber sources plantation grown species such as Mountain Ash for internal applications such as wall and ceiling linings.

Silvertop Ash (Eucalyptus Sieberi)


Silvertop Ash, or ‘coast ash’ as it is commonly referred to due to it’s tendency to grow along the eastern coast, is a distinctive timber with many features including noticeable growth rings, gum veins and pencil streaks. It’s these features which make it great for visual applications.


Silvertop Ash grows in southern and central coast of New South Wales, eastern Victoria and north-eastern Tasmania.


The colour variation in Silvertop varies from pale to medium brown and often has a light amount of feature which can give a recycled timber look.

Species E. Sieberi
Common Name Silvertop Ash
Density – Dry 820kg/m3
Density – Green 1030kg/m3
Strength Group S4 SD3
% Shrinkage-Radial 6.0
% Shrinkage-Tangential 10.1
MOE – Dry 17
MPA – Green 10
MOR – Dry 136
MPA – Green 69
Hardness – Dry 9.5
Hardness – Green 7.2
Durability Class(above ground) 2
Durability Class(in ground) 3
Lyctus Bore Non-Susceptible
Av.External Life(above ground) 15 – 25 years

Fire Data

Australia has long had devastating bushfires, thats why its important your timber meets the required ratings. There are also certain fire requirements for internal or external applications on particular dwellings. These fire properties  must be considered in the design faze. 
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