In a previous post, we listed a few naturally durable woods that happen to be resistant to termite attack and which homeowners and builders may be interested in using for projects, as a means of termite treatment or termite prevention. Here we continue that list, noting once again that each entry is being studied for its heartwood, as it is this part of a tree that is most resistant to termites and their assaults.
1. Cordia subcordata – also known as Kou or the Kerosene Tree, Cordia subcordata would make a good construction termite treatment choice, as it has long been noted to possess a powerful resistance to termites. It is also soft as a wood and very easy to work with, making it a popular choice for household items such as bowls in its native land. However, it has recently been added to the list of threatened species as its numbers have been dwindling. There may be concerns with its use in construction as well because of how easily it burns (hence the name).
2. Calophyllum inophyllum – widely spread throughout Asia, this tree goes by a lot of names, from Kamani in Hawaii to Punnaga in India. It is actually commonly used as an ornamental plant, this tree is also known to have good resistance to termites. It is in fact used for various construction projects in its native areas, although there may be difficulties with using it in construction due to its trait of shrinking once it dries.
3. Thespesia populnea – also known as the Portia Tree, this plant features a beautifully dark heartwood of a deep, reddish brown that may actually occur as yellow sometimes. Also called Milo or Miro, this wood is unlike that of Calophyllum inophyllum because its density is such that it does not shrink upon drying, at least not markedly. It has long been used by the peoples in the lands where it grows naturally in order to produce woodwork items, from tableware to sacred tablets and the like. It is also quite easy to work with, as suggested by its popularity as a cabinet wood in the same areas. The University of Hawaii is currently emphasising this wood in its research on woods that may be used as termite prevention options for construction, along with the Japanese Sugi wood (see the previous list for this).
4. Eucalyptus microcorys – also known as Tallowwood, this is a good wood for termite treatment and termite prevention in construction because it is already used so often for it in Australia. It does not grow very fast but is very workable and has been shown to have definite resistance to termites. It may be grown in other countries suffering from termites, perhaps, as a plantation wood for building.