Timber Options

for Econstrukt timber windows and doors

Exterior joinery is exposed to harsh elements most of the time. Heavy rain, hail, and extreme heat conditions are common in New Zealand. When exteriors are exposed over time the difference between any old window and a quality window becomes apparent. Fairy tales are told:  people say that  “Timber windows are not suitable for the harsh climate in Central Otago” - we disagree.


Timber is a natural material unlike PVC and Aluminium. Timber windows and doors stay dimensionally stable in order to fulfil their task. We have benefitted from centuries of European design and skill in engineering joinery; we use that knowledge wisely. Unfortunately in our fast modern times the need to take the special characteristics of timber into account is often replaced by time saving work processes.



Siberian Larch grows in Siberia, Europe and North America (Canadian Larch). Larch is very rot resistance, and so it is especially valuable for weatherboards, decking, posts, poles, railroad sleepers, and mine props. The harsh climate of Siberia and North Canada results in a very hard and durable timber. The high density of the Siberian Larch of 0.64 g/cm3 is proof of this. The high density and tannin content make it difficult for the organisms that cause decay to penetrate our wood. Siberian Larch is durable without additional chemical treatment. Siberian Larch is the perfect timber for conservatories.

All Siberian Larch scantlings are sustainable and FSC - certified.



American Oak is an historically important timber and is classified as class two durable (BS EN 350-2). Oak wood has a density of about 0.75 g/cm3. It is known for its great strength and hardness, and is very resistant to insect and fungal attack because of its high tannin content. It also has very pleasing grain markings, particularly when quarter sawn. American Oak is durable without chemical treatment.