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Question

I would like to find out the pros and cons of using kd hardwood vs meranti for a full height bay window. Are they comparable in terms of durability/longevity for a south-facing full height bay window, that will be primed and painted? What is your recommendation?

Woodsolutions Answer +

We take it the KD hardwood you refer to is Vic ash. Light-red meranti is rated Durability Class 4, and Vic ash Durability Class 3 according to Australian Standard 5604, Timber - Natural durability ratings. Durability Class 4 implies a probable service life of up to 7 years while Class 3 implies a probable service life of up to 15 years outdoors above ground. The ratings apply to raw timber without a coating or preservative treatment. With a well maintained paint coating they would be expected to achieve the predicted life and possibly longer, depending on weather exposure, eaves overhangs, etc. However, for a long life we recommend preservative treatment in both cases. You will find companies that produce meranti windows treated with Light Organic Solvent Preservative (LOSP) by searching the net. Preservative treated Vic ash is available under the trade name Iron Ash.

Window joinery

Answered on 04-05-2021
Please note that our answer is based on the best advice available at the time. If the National Construction Code, Australian Standards or local requirements have been subsequently amended, our answer may no longer be correct in all details. For more information, please read our disclaimer.

Question

Gday am looking for a flexible hardwood for an outdoor timber bench seat. Seat is made of masonry on a curve and timber slats of 35mmx35mm dimensions or similar are to be used as horizontal slats.

Woodsolutions Answer +

It would have to be a gentle curve for you to bend a 35mm solid section of hardwood. Aside from steam bending, the usual way to achieve curved timber is by glue lamination. If you write 'curved glulam' or similar wording in your browser you will find companies who can do this. If it is only a minor curve, such that it can be achieved with solid timber, you will need to ensure that straight-grained pieces are selected so they don't split when bent. The usual range of durable timbers, suitable for outdoor use, will be suitable.

Curved timber

Answered on 03-05-2021
Please note that our answer is based on the best advice available at the time. If the National Construction Code, Australian Standards or local requirements have been subsequently amended, our answer may no longer be correct in all details. For more information, please read our disclaimer.

Question

Is White Cypress a Class 1 timber in ground ?

Woodsolutions Answer +

According to Australian Standard 5604, Timber - Natural durability ratings, white cypress (Callitris glaucophylla) is rated Durability Class 2 in ground and Durability Class 1 above ground. This and other properties of cypress can be found on our website via this link https://www.woodsolutions.com.au/wood-species/cypress-white.

Cypress pine

Answered on 29-04-2021
Please note that our answer is based on the best advice available at the time. If the National Construction Code, Australian Standards or local requirements have been subsequently amended, our answer may no longer be correct in all details. For more information, please read our disclaimer.

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