Silvertop Ash Decking

Overview

“Silvertop ash”, or sometimes named “coast ash” due to its occurrence to grow along the coast of the south-eastern areas of Australia, is a moderately durable and relatively light hardwood compared to other eucalyptus like spotted gum and ironbark. The timber has a medium texture with a straight grain, also showing noticeable growth rings. The timber also often comes with natural features including gum veins and ambrosia, giving the timber a unique look. Silvertop ash is readily available through the eastern states of Australia, with its main source being from native forests, with some trees being grown internationally, in New Zealand plantations.

Silvertop Ash Decking
Silvertop Ash Decking

 

Pros & Cons

PROS CONS
Less expensive hardwood decking Termite-prone
1 of 7 hardwoods recommended by the building commission for bushfire prone areas Relatively prone to surface checking and splitting
No tannin leach Not as durable as other Australian hardwoods
Widely available Light to medium feature present in timber
Easy to work, excellent for nailing and screwing
Accepts coatings and preservatives well
Can be supplied in set lengths

 

Properties

Name Eucalyptus Sieberi
Colour (Heartwood) Cream-yellowish brown
Colour (Sapwood) Undistinguishable
Durability Class 2
Density 850 kg/m3
Hardness Janka rating 9.5
Checking rating
Shrinkage rating
Availability Moderately Available
BAL Rating 12.5
19
29
Termite Resistant NO
Lyctid Borer Susceptible NO
Tannin Leach Little
Origin TAS, VIC, NSW