On Fri, 26 Nov 2004 17:14:53 GMT, BigWallop wrote:

I'd personally go with your option one (1), but, using proper
roofing felt as the underlay, rather than just plastic sheet.

Aye, or even one the more modern breathable membranes though for a
"shed" this is probably wasted.

The tiles can then be placed back on battens, which are also sealed
with liquid felt to the underlay felt to stop the weather getting
in,

You don't want to seal the horizontal battens to the felt or any water
that does get under will puddle at each batten and not run down and
out at the eaves.

--
Cheers
Dave. pam is missing e-mail