There are build systems available in the world that would cut house construction times by 80%. We just do not use them, by and large. See for example this video. They will provide more than adequate seismic, fire and insulation properties if appropriately specified.
You are joking right?
They built a concrete block shell 23m sq room in three hours. There is only 1 room plus a "bathroom". No roof, no plumbing etc. I'm sure the standard retaining wall blocks could do the same thing...
It's a great to start replacing shanty towns but will be sad to see these popping up any where in NZ.
Yes, I can see you grasped the concept fully there....
That was called a "demonstration". It's not a completed home, it is a shell ready for pumping the concrete into. The rest of it comes later. The video is designed to show the speed with which a building can be erected compared to traditional systems. You will need to extrapolate the additional time required for bigger buildings, site work, fixtures and fittings and so on.
The point is, you need not wait 8 months for a bunch of half-educated cowboys with nail guns to mess about on site building a large garden shed made of flammable materials that will probably leak, with a roof made of the same material pig sheds are made of.
It does baffle me that the Germans can construct a house in a few weeks and it takes months here and ends up needing months of remedial work. And cost heaps more after exchange rate differences etc.I know about the code differences but it still does not add up. House building is minefield and it does not need to be.
Quite. And if anyone thinks German building codes are lax compared to ours, they are much mistaken.
It's a question of competence and efficiency more than anything. I've seen examples in Germany where the architect uploads the timber frame requirements to a factory via the internet, a robotic production system creates the specified trusses, panels or whatever, they are packed, labelled and delivered to site ready to go up.
Another German system of ICF building has big polystyrene blocks with keyed ends like a jigsaw. They are light, easy and safe to handle and very quick. You build the walls for a floor at a time with rebar in the voids, then a truck comes on site and pumps wet concrete into the voids. You clad the outer and plaster the inner, and hey presto - insulated fire resistant walls in days not months.