"Andy" wrote in message
...
I have agreed to help someone erect a metal shed ( 10 ft x 6 ft ) but
it doesn't have a floor . Could someone advise on the best option - a
concrete slab , paving slabs ( with timber bearers etc ) I am
concerned about rain water run off and getting inside if it is just
erected on a concrete slab.
Any advice would be most appreciated.

Wooden floors can be a haven for rodents underneath.
If poss I would erect direct to the concrete base, cover the inside with a
quality rubber mat and seal around the outside edge with a cement flaunch.

My next door neighbour just lifted his old wooden shed, on a wooden floor of
which there was around a third chewed away and a rat nest underneath.