On Jul 9, 9:52*am, (Una) wrote:
We ordered a metal shed kit with anchor kit for use on a cement
slab. *Along with the anchor kit came a flooring kit, beams over
which the consumer lays plywood or decking, or fills with sand.

I am unsure if it is wise to use the flooring system. *This new
shed replaces a similar shed that had chronic problems with water
running in under the frame, especially in windy wet weather. *
Stuff to be kept dry had to be kept up off the slab. *Will using
this flooring kit create a mold problem in the shed? *Or habitat
for insects and rodents?

* * * * Una

The devil is in the details.............

How about some photos of the proposed installation site?
IS there a concrete slab? (you mention an anchor kit for a slab)

Water intrusion issues are usually related to slab; poorly located?
poor perimeter drainage.

Without seeing the details, the best I could do is guess.

Use the floor system.
Fill will VERY coarse sand or pea gravel.
Coarser materials will not wick & will tend to stay drier.

Cover gravel / sand with HEAVY plastic (to act as a vapor barrier for
the shed & floor)
Install plywood.

All these details are to make up for what is probably a slab that is
inadequate to serve as a shed floor.

Bulk density of gravel is about 100 lbs/ cubic ft.
A shed 10' x 10 with 3" layer of gravel would require about a yd of
gravel (.9 yd) ~2500lbs.


cheers
Bob