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AS3660, where discussing preservative treated timber, advises of need to treat holes, cuts etc. Some manufacturers advise, within some constraints, they will warrant not treating holes, cuts etc., whereas others do not. As an industry representative body can you not work towards bring this all into line with the preference being, within accepted constraints, holes cut etc., not being required to re-treat and AS3660 to align with that. Without that, under the NCC requirements, it makes it very hard to state all building elements of a structure containing treated timber are not subject to termite attack and therefore require a termite management system, unless all holes, cuts etc are treated. The human factor of performing, without exception, the re-treatment, leaves that option very troublesome and a builder ultimately liable unless they also use a termite management system, all adding to cost to consumer.

Woodsolutions Answer +

The need to re-treat cut ends, notches etc. depends on the hazard the timber will be exposed to, as well as the warranties offered by producers. Preservative-treated timber in weather-exposed locations should have cut ends, housings and notches re-sealed to maintain the preservative 'envelope'. Preservatives don't always penetrate the complete cross-section and if cut ends are not re-sealed, untreated material may be exposed. Treated house framing, eg. 'Blue Pine', is a little different. Re-sealing of Blue Pine is generally only required if there is a major breach of the protective envelope, eg. by planing, rip sawing down the length of the piece, or cutting deep notches, since the treatment only penetrates a few millimetres from the surface. Re-sealing is not required for cut ends or holes, and warranties will not be voided in such cases. Producers' warranties can be found on the net. Note that Blue Pine house framing is not protected against wood rot, since it is not anticipated that there will be moisture in the wall cavity. It is only protected against termite attack. Note also that while the Blue Pine treatment protects the framing it doesn't necessarily prevent termites from entering the building and attacking the contents such as books, papers and joinery timber. Consequently we recommend barrier systems to keep termites out of buildings. Treatments such as Blue Pine are then a second line of defence in the event that barriers are breached.

Termite protection

I have a DIY question. i want to change the colour of my old Jarrah wood bookshelf, which is 2.8 m wide and 3.9m high. It has currently dark red tones and shades in it. I would like it to be a lighter shade. Is there a way I can strip off the colour? The other option I was thinking was to paint it white with a chalk paint. I have timber flooring which is a dark brown shade. The jarrah red toned bookshelf does not go with the decor. Please can you advise how i can change the colour at home.

Woodsolutions Answer +

The natural colour of jarrah is dark red and the colour goes right through the wood so it's not just a matter of stripping off the colour. It is possible to bleach wood so if you write 'bleaching wood' or similar wording in your browser you will see how to do it. However, your suggestion of painting it white would be a lot simpler!

Jarrah colour

I was asked by my client to install some untreated hardwood timber joists in his industrial unit (man cave)
This was three years ago. he has noticed wood powder on the floor and a pest man said there are borers (yes there are)
What pest treatment is effective and can be done on site as removing the joists would cause heaps of damage
In a nut shell " how do we treat these borers on site" ???

Woodsolutions Answer +

Fine powder on the floor, like talc powder, is a sign of Lyctid borer aka the 'Powderpost Beetle'. These borers can only attack the sapwood of certain hardwoods, so they are no risk to any softwood in the house, eg. pine, oregon etc. Also they are unlikely to have any structural effect on the joists since sapwood is usually only present on a corner or edge. They could therefore be left alone if there is limited sapwood and appearance is not important. If treatment would provide peace of mind we suggest floor brushing with a boron-based soloution. You will find further information about Lyctid borers by searching the net.

Lyctid borer
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