1.) Concrete (binder/sand/gravel/water), complex dry concrete
mix, or clay soil.
2.) Asphalt sheet
3.) Masonry materials – bricks/rocks/concrete blocks
The dimensions of a common foundation of this type amount to about 14″ x 14″/ 350 x
350mm, or even less. For gazebos and small garden tool sheds, bricks laid flat on the ground
often suffice. The recommended dimensions of the foundations for a specific shed should
form a part of the project documents – plans. Even this stage, like the remaining
technological stages, is governed by the rule that the foundation size should be in proportion
to the size of the shed. Practically every builder/tradesman with a bit of experience has
intuition for the proportions in such small structures.
Before we start with the foundation, the base should be prepared. Sometimes it is
enough to flatten the place; the topsoil can be removed prior to that (4″ / 100mm of the top
soil layer containing the roots of grasses and other small plants). If you wish your
foundations to be more profound, pour concrete in the base and lay the brick foundations on
a piece of board to prevent ground water from rising. The total foundation height should be
at least approx. 12″/ 300mm to ensure a sufficient gap between the wooden structures and
the ground surface.