Here in West Wales....
In my wee shed just now, I noticed that in general stuff was dry.
There is some thin mild steel sheet leaning up one wall thats dry - but some galv sheet right next to it is covered in water droplets!
(Workshed is single skin block with boarded and glassfibre flat roof - & the shed is set back into the upsloping rear garden so at the back & one side 80% is u/g, the other maybe 50%).
I did run DPM all round the outside of the block walls before backfilling and thr slab has DPM under also).
Shed isn't airtight around the main (steel framed) wooden double doors, but pretty good.
Last few days you can feel the 100% humidity in the air just walking about, while as the temp drops it gets clammy cold that goes right through you.
In my wee shed just now, I noticed that in general stuff was dry.
There is some thin mild steel sheet leaning up one wall thats dry - but some galv sheet right next to it is covered in water droplets!
(Workshed is single skin block with boarded and glassfibre flat roof - & the shed is set back into the upsloping rear garden so at the back & one side 80% is u/g, the other maybe 50%).
I did run DPM all round the outside of the block walls before backfilling and thr slab has DPM under also).
Shed isn't airtight around the main (steel framed) wooden double doors, but pretty good.
Last few days you can feel the 100% humidity in the air just walking about, while as the temp drops it gets clammy cold that goes right through you.
an aldi special grafted on 
