-
Losing all of those plants would help. Otherwise, it looks like a shack that has a lot of gaps for falling and driven rain to get in.
If you're going wood on brick, I'd consider a DPC - between the brick and soleplate at least.
Ventilation is not a panacea for damp getting in - although it does help.
It's mostly for dispelling damp from inside - breathing, cooking, washing etc...
As you're (I'm guessing) not heating the shed, having some air bricks at the bottom and vented soffit / eaves / however you do the roof isn't exactly going to burn fuel though.
The general approach is to stop water / damp getting in, and have a way for any that does get in to get out.
NotThamesWater-
Planning to loose the clump closest to the camera in the image but partner is a gardener and garden is tiny so keen to make the most of the space - Maybe trellis up the sides would help? Never heard of dpc before, that's a good shout, cheers. Airbricks at the base and then vent at the roof it is. Planning to move the door so it's easier to take the omnium in and out.. Also should be able to store it non-vertically. Pics attached. Do need to do some emergency repairs to the roof of the existing one - anyone had any experience with osb + felt roof?
Osktranot
Cheers, had a go and it looks like it'll do the trick. Does anyone have any experience avoiding a damp shed? Current on is wooden sitting on a few blocks, frame surrounded by a weatherproof membrane but it's still gotten pretty bad after a decade.. Plan for the new one is to pour a concrete base and run a course of bricks, on which the new wooden frame will sit. Should I have ventilation top and bottom? Is insulating it going to make a difference?