Leaving aside the problems with asbestos disposal. What would be the
best material to replace the (properly disposed of) corrugated asbestos
cement roof? Corrugated bitumen sheets seem ok for sheds but they seem
a little flimsy for a garage roof.
On Tue, 16 Aug 2011 11:15:52 -0700 (PDT), harry wrote:
Modern materials aren't durable, are they? Onduline is about 15 years if
looked after (kept cleanish and moss etc. removed - not much else that one
can do), steel only a bit longer.
The roof on my shed is asbestos cement, has had a lot of moss, is only about
7 - 8 deg. slope and is ~60 yo. Yes, it has a few cracks but it doesn't
Trouble is, although I'd like to replace it before it cracks in a critical
place, there seems to be nothing that would be easy to use. There is only 1
support in 3m at a low angle and anything new would require at least 3 or a
full deck - and even a deck needs more support.
I'll leave it until a tuit lands in the garden.
For me appearance was also an important factor. I chose Steadman's AS 2000,
not cheap but long lasting and still looking good 4 years on.
Care with installation is important, particularly on shallow pitched
roofing. Rain can *bounce* under the sheet laps. Steadmans will
recommend using a butyl strip seal and stitcher screws along the laps.
... you only need to plan on replacing it once. (In 2008, government
staticians reckoned that a 64 year old man in 2011 would have a life
expectancy of 22.3 years - so the odds of not making 25 years is only
slightly less than 50/50)
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