31 July 2009

Building the eco friendly way - Wall and roof framing progress

We mentioned previously that the intention is for the house to be self sufficient for water. The tank above is where all the potable or drinkable water will come from for the house. Based on our calculations, the tank size of 24,000 litre should be adequate for our clients anticipated water usage. A grey water recycling system will provide the water for flushing of toilets, the washing of clothes and for garden watering. So the tank above will only supply water to bathroom and kitchen taps and showers.

The erection of the wall and roof framing is progressing well. The images above show the single level, north facing living areas virtually complete. Elements of structural steel were required to facilitate the large spans across some of the window openings.

Hyspan rafters have been used for the large span living area, as can be seen below. A hyspan rafter is essentially a plywood composite beam made using low grade plantation pine timber. The beams offer a very economical means with which to create large spans with timber. The adhesive used to bind the timber is rated as E0, which is the lowest VOC emission level available.

Having completed all of the ground floor framing, above you can see the first floor wall frames and some of the roof framing being erected.

Note in the for ground the timber waste stockpile. We are really anti the waste created during construction, and so are constantly looking for ways to try and reduce any material wastage. Any waste material created is being separated into like material groups ie, steel, timber, concrete etc so that recycling is as easy as possible. Irrespective of this, waste created during construction is a big environmental problem. It is estimated that demolition and construction creates around 25% of all waste created. So long before avenues for recyling are looked at, waste should simply be reduced. We feel that we are doing a really good job of this, but as you can see in the image, it still exists.

On top of the environmental concerns is the fact that waste such as the timber above has been paid for. One might as well simply throw money into the rubbish. So reducing waste also has a bottom line, it is good for your back pocket.


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