"Nightjar" wrote in message
...
On 15/08/2012 15:15, gogmagog wrote:
My mum n dad have a garage attached to their house. It's rather long,
since
the guy who built it (previous owner did it himself, we're told) also
extended the kitchen sideways at the same time. So, it's the same length
as
the house (25 feet or so). Neighbour says he used pretty much any bits
of
chipboard he could find. There seems to be no incline, since water tends
to
sit it pools on top. It has a few leaks, and has once caused water to
pour
out of a light switch in the kitchen. I patched that one up, but we're
thinking it would be nice to do something so that we can just forget
about
it in future. Having it properly replaced is out of the question - the
money will never be available in their lifetimes. I was wondering if I
could cover it all up with some corrugated sheets, making sure they slope
down to the back, where there is already a gutter. Is this a reasonable
thing to do, or just plain bonkers?

If the boards are sound the cheapest option is probably a paint on
coating:

http://www.polycoteuk.com/category-f...-coatings.html

Colin Bignell

I don't know how good they are in general, but some are definitely softened.
It might be possible to replace a few after inspection, and then coat it.
But that looks like a good option.