Always a mine of useful information, I thought I'd ask if anyone has
successfully accomplished the sealing of a garden shed to a concrete base.
I have a new 8'x12' heavy duty shed being delivered/erected this week.
There is no floor to the shed, which will stand on a large level, concrete
base. I have a roll of 10" wide damp course vinyl and thought I would stand
the upright walls onto this, then find a way of sealing the vinyl to the
shed.

I first thought of folding the vinyl up against the shed wall, and
stapling/sealing. but then, one single leak would provide a well of water
in which my shed could rot. So instead I thought I would cut the vinyl
flush with the shed walls, making a neat waterproof seal directly beneath
them, then apply some kind of sealant to the outer/inner edges. Does
anyone have any ideas which product would be best for such a job? Tar I
suspect would be great - but I'm no specialist and whatever I use would
need to come from B&Q or Homebase (that defines me as UK-based, for non UK
readers...).

Any views appreciated.
Baz (Woodford, Essex).