Not that long ago, I purchased a building whose roof was made of cement sheets known to contain asbestos. As I intended to move in with my wife and kids, there was no way I was keeping it like that: So I decided to change the roof for a standard tiled roof.
An experienced mate of mine help me a lot and I thought I would pass on the info as it is really quite basic and really good fun.
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Signing UpStep 1Calculation and planning
To decide on what section of wood you should use, you need to do some basic calculation:
You need to know:
How heavy are the tiles per square meter: Mine are 20 tiles/m2 and each weighs about 2.5 kilos so roughly 50 k/m2 (you can find this info in the tile manufacturer documentation(pdf))
How much snow/wind can you get in the winter: This depends on your altitude and location. I've got some tables that says for me, I need to add 70kg/m2, this is quite a lot but I live at 500m above see level and in a montaneous region.
With this, you should be able to calculate the weight per m2 that the roof will have to carry. I was quite conservative and went for twice the weight: It was my first roof and I'm putting my kids under it remember !!
You pay wood by the cubic meter, so, especially if you're doing a large roof, you don't necessarily want to oversize everything.
If you want to fine tune the cost, you can take into account the slope of the roof which alters the figures a bit, probably worth bothering if your roof is large and quite sloppy.
This photo is a before photo (it was shot in june, the finished one in february, hence the gloomy look... don't say it was better then please)
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I did move in that space with my pregnant wife and my kid (just 12 months at the time) and we're 4 since last november. We've got 2 dogs as well. we'll have been living there for a year on the 1st of June.
The place is tiny but functionnal. It used to be a bread oven. The inner footprint is rougly 3,50 by 3,50 in meters. Donwstairs, We've got a main room with kitchen, table a 0.80m wide bathroom with a loo and a shower cabin. Upstairs, we've got a collective bedroom for the 4 of us... the main issue is the clutter as there isn't any storage at all.
For the beams, I did oversize the size by a great load. I've bought some books with tables sincefor my other project... I was very conservative, but you know, first timer plus the wife (and me) not overconfident in my DIY skills pushed me there.
I'll try to put more up about my main project... I'm really pleased with it... It's working out a lot better than I thought !!
Some tips:
Try not to break it, and do not use cutting tools that kick up dust. Especially, do not use power tols on it ever.
Keep the asbestos wet at all times, this keeps down the dust.
Double bag it and mark it clearly as asbestos.
Get yourself some tyvek overalls, and dispose of them at the end of the day.
more at http://www.nsw.gov.au/fibro/brochure.asp
Here is another part of the same project: I did changed the front windows to have a panoramic one instead:
http://www.maffiou.com/article.php3?id_article=11
Today i'm trying to get this place finished:
http://www.flickr.com/photos/maffiou/sets/72057594060669442/
I might to some before after thinggy as well. but there is 3500 sqft to do from scratch (just keeping the outer walls). There was only 200sqft in the first one.