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woodyandluna
Joined: 05 Jul 2005 Posts: 71 Location: Milton Keynes
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Jill
Joined: 23 Jun 2005 Posts: 13
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@Calli
Joined: 03 Jul 2005 Posts: 1682 Location: Galway
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tawny owl
Joined: 29 Apr 2005 Posts: 563 Location: Hampshire
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tawny owl
Joined: 29 Apr 2005 Posts: 563 Location: Hampshire
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Posted: Tue Oct 25, 05 4:40 pm Post subject: |
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tawny owl wrote: |
One system I saw at the homebuilding and renovating show that was quite interesting was insulating concrete formwork done by Beco Wallform, Polarwall, Quadlock and a few others. It's basically a polystyrene brick that's used to build the actual house up to the first floor, then filled in with concrete, leaving the insulated brick in situ, and that's then clad with plasterboard or tiles on the inside and render or whatever on the outside. Thus, you basically end up with a sort of reverse cavity wall, with two layers of insulation sandwiching the building material. Now before anyone jumps on me because of the use of polystyrene and concrete, this type of building is so well insulated that energy costs are very low, and also it cuts down on some other harmful materials. Building costs are also really low (they were talking 3 grand to build a 2-bedroom house up to the roof), and it's very versatile, because the strength is all on the outside walls, thus all internal ones are stud and so it's very easy to change a basic design. See https://www.becowallform.co.uk/web/techbr.pdf for the technical details. |
A house using this system was on Grand Designs last week. The owner ended up with a very interesting (and I thought quite lovely) curved house, although it seemed the architect was learning on the job, and poured the whole of the staircase tower in one hit, thus ending up with some of the blocks giving way and causing 'blow-outs', which then caused problems when the staircase was lowered into the tower. Personally, I'd have put the staircase in and built round it, but there you go. I was surprised they had so much trouble, because when I spoke to these people at the show, they said that they'd recommend trained builders, or if there weren't any in the area, they'd send their own person to supervise. They also made it very clear that only one floor at a time could be poured, to prevent exactly this problem, and that steel rods were needed for reinforcing throughout.
V. interesting though, and well worth having a look at, as it gave quite good close-ups of the system. |
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dougal
Joined: 15 Jan 2005 Posts: 7184 Location: South Kent
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Blue Sky
Joined: 30 Jan 2005 Posts: 7658 Location: France
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Rob R
Joined: 28 Oct 2004 Posts: 31902 Location: York
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Rob R
Joined: 28 Oct 2004 Posts: 31902 Location: York
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hardworkinghippy
Joined: 01 Jan 2005 Posts: 1110 Location: Bourrou South West France
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tawny owl
Joined: 29 Apr 2005 Posts: 563 Location: Hampshire
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Posted: Wed Oct 26, 05 11:45 am Post subject: |
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Rob R wrote: |
I like the idea of these wooden homes & as they have a lot of them in Scandanavia they can't be too bad in the cold! The thing that appeals most is the speed at which they can be made water tight & the good finish that can be achieved. Also, they don't take as much moving if need be |
You need to be careful with the type of wood, though - hardwood such as oak is definitely needed in the UK. It's not the cold that's the problem, it's the damp. Scandinavia has dry, cold winters, ideal for timber houses, even if softwood, whereas the damp, mild climate of the UK is very bad for wood. Having said that, we looked at timber-frame houses at the show, and in fact, attended a talk on them, and they looked very interesting as well. |
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Rob R
Joined: 28 Oct 2004 Posts: 31902 Location: York
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woodyandluna
Joined: 05 Jul 2005 Posts: 71 Location: Milton Keynes
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Will
Joined: 30 Jun 2005 Posts: 571 Location: Grenoside, Sheffield
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tahir
Joined: 28 Oct 2004 Posts: 45674 Location: Essex
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