Timber Design Awards
The aim of the Mangawhai House was to create a high end family home made entirely from locally made plantation timber products of low or zero toxicity, hence negating the need to use imported or local timbers of questionable environmental credentials.
The main feature of the house is the exterior natural wood cladding. This utilises Elements Vulcan+ vertical shiplap which is a new patented thermally modified weatherboard with engineered vertical grain orientation. This provides an aesthetically pleasing natural wood finish alternative to Western Red Cedar, and features chemical free natural durability, superior stability and excellent weathering characteristics. The weatherboards are supplied factory coated with a specially formulated Protector plant based oil finish.
The paint finish radiata pine weatherboards are treated with a low toxicity arsenic and solvent-free preservative system and pre-primed with a water based primer thus minimizing VOC emissions.
The Sand+ radiata pine decking features a low toxicity non-arsenic preservative, has vertical grain orientation for superior weathering similar to hardwoods and is pre-finished with Protector oil.
Glue laminated radiata pine beams form the back bone of the house providing a cantilevered awning over the main outside living area.
All wood used was FSC chain of custody certified from renewable New Zealand plantation timber, this ensured complete assurance of raw material source.
The over-all effect is a high grade finish house that would typically utilise tropical and/ or exotic species as well as toxic treated timber. However the final result was a building with no imported wood and no toxic products, with an over-all negative carbon footprint. All this achieved below the cost of an equivalent build.
Photos: Jeremy Toth