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Question

I purchased a Jarrah wood bench several years ago and it came with a can of Timbachem Jarrah Color guard Plus for future maint. I applied
One coat ~3 years ago. I wanted to put another coat on this year and visited the store where I purchased the bench. The only product the offered was IPE Aftercare Kit, that included a wood brightened and a wood penetrating oil by Penofin. The clerk stated that all of her customers use this on their IPE furniture. Since I have Jarrah wood and have used the color guard plus one time, should I continue with the color guard product?

Woodsolutions Answer +

WoodSolutions doesn't test timber finishes and we don't have any particular expertise regarding brand-name products other than what we read on company websites. Our Technical Design Guide number 13 deals with external finishes in a generic way and might be some help. You can download a copy here: https://www.woodsolutions.com.au/publications. Since Timbachem appears to be a water-based finish we can only suggest that another water-based finish should be compatible. For example, Cabot's produce a water-based Jarrah Deck and Exterior Timber Stain. However, we can't provide any data on its performance. Other companies may have similar products.

Jarrah deck finish
Question

I am trying to find out the suitability of LVL's for a flood environment. My engineer and frame and truss company indicate that a H3 treated system is suitable, however my DA condition says that "relevant documentation from the manufacturer shall be provided demonstrating that the materials satisfy the definition of ‘flood compatible materials ". Nobody is able to provide this documentation. I have tried Meyer Timber, Carter Holt Harvey and the internet and nobody can give me a sensible answer let alone a document. Any chance you have knowledge and the document that will allow me to use it in this circumstance. Flood Water is short term overflow from a train line culvert in the event it is blocked.

Woodsolutions Answer +

Your DA has asked for documentation demonstrating that H3-treated LVL's satisfy the definition of 'flood compatible materials'. Presumably the definition is the one in documents published by NSW councils to the effect that engineered timber products are unsuitable "unless certified by the manufacturer as being resistant to the effects of repeated immersion for periods in excess of one week", for example as stated here: https://www.hawkesbury.nsw.gov.au/__data/assets/pdf_file/0003/78951/Flood-Compatible-Material-Guide-2016-May.pdf. If the manufacturers you have contacted are not able to provide the required certification, it suggests that perhaps their products are unable to meet the above definition. However, Wood Solutions cannot provide a ruling on this matter since that is up to the manufacturer. Nevertheless, Carter Holt Harvey's guidelines on using their Hyspan LVL in weather-exposed locations may be helpful. The data sheet can be downloaded here: https://fblvl.com.au/assets/Uploads/125a2fa01e/Futuebuild-hySPAN-hyJOIST-Weather-Exposed-April-2013.pdf

H3 LVL
Question

CCA treated Pine Framing in playground equipment.

Woodsolutions Answer +

While CCA treated timber is no longer permitted in playground equipment you can download a data sheet here that helps to put it into perspective: https://healthywa.wa.gov.au/Articles/S_T/Stay-safe-around-copper-chrome-arsenate-treated-wood. Note particularly that children who place their hands in their mouths after playing on CCA-treated playground equipment may ingest between 2% and 8% of the World Health Organisation's safe daily limit, and that there are existing CCA-treated items all over Australia that have not been required to be replaced. 

CCA treatment
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