Tallowwood Decking

Overview

The timber commonly known as “Tallowwood” owes its name to the greasy feel of the wood once it has been cut or machined, due to its naturally oily composition. The decking should be left to weather slightly (2-3 weeks) before giving it a sanding, slight wash with a deck cleaning product and oil. It is a highly durable and dense timber, which is highly resistant to decay due to its ability to withstand damp and wet conditions relatively well; however the softwood of the timber is Lyctid borers susceptible, so any sapwood present in the decking boards maybe have to be treated to help keep them free of the bugs. The heartwood colour ranges from a pale to dark yellowish brown, with a moderately coarse texture and interlocked grain. Availability of tallowwood is fairly common, with most of the resource being sourced from native forests on coastal regions between southern Newcastle, NSW and Maryborough, QLD.

Tallowwood Decking
Tallowwood Decking
Tallowwood Decking
Tallowwood Decking

 

Pros & Cons

PROS CONS
Termite Resistant Mostly available in random lengths
Very high durability and density High tannin / oil content
Good resistance to surface checking Pre-drilling required
High resistance to decay Lyctid borer susceptible
Performs well in wet environments – good for pool areas

 

Properties

Name Eucalyptus Microcorys
Colour (Heartwood) Pale to dark brownish yellow
Colour (Sapwood) White to light brown
Durability Class 1
Density 990 kg/m3
Hardness Janka rating 8.6
Checking rating
Shrinkage rating
Availability Moderately Available
BAL Rating 12.5
19
Termite Resistant YES
Lyctid Borer Susceptible YES
Tannin Leach Little to moderate
Origin NSW, QLD