On 22/03/16 18:45, John Rumm wrote:
On 15/03/2016 15:34, The Natural Philosopher wrote:
On 15/03/16 15:21, Tim Watts wrote:
On 15/03/16 15:04, The Natural Philosopher wrote:
On 15/03/16 13:52, Martin Bonner wrote:
On Tuesday, 15 March 2016 14:45:04 UTC+1, The Natural Philosopher
wrote:
On 15/03/16 13:13, David wrote:
If I insulate, there will be a ventilation gap beneath the tiles and
membrane from eaves to ridge and back to eaves, but no ridge vents
(unless I pay someone to go up on the roof).

How necessary are ridge vents?

Not really necessary at all

Well, not unless you want to prevent condensation on the timber
rafters.
(Or, to put it slightly less elliptically, "Actually quite
necessary").

Where does the water come from then?

(Or, to put it slightly less elliptically, "Actually quite
unnecessary").


Damp air.

My shed had no humans living in it. Nor does it have a source of water
vapour other than the air.

However, if I leave it all winter, during the worst months it will have
condensation running down the windows, mould growing on odd bits of ply
and tools will go rusty.

well it cant be ventilated then

My lawn had loads of wet dew on it the other day... that's quite well
ventilated!




But does it still?


--
Outside of a dog, a book is a man's best friend. Inside of a dog it's
too dark to read.

Groucho Marx