Proposal 3

Reinforced concrete foundation

A reinforced concrete foundation in a gravel bed is without doubt the optimal, but also the most expensive solution. Even with this option, preventative measures must be taken to ensure that no water can leak through into the shed. A shouldered foundation with a step of 2 cm x 7 cm running around the circumference is of all the variations proposed here, the most ideal solution .
(Attention: ensure that a plastic-sheet is placed between the gravel and the concrete to prevent rising moisture).

Should you wish to construct the foundation without the step, it is essential that a metal compatible sealant be applied to the underside (between foundation and frame) of the Floor Frame.