Foundations and ground conditions
to build, proper foundations are very important to prevent part of the
construction moving after the building is finished. Important components may
break if the foundations move under the load from the building.
conditions must be suitable for erecting a building. Rock, stone and
sand/gravel form good building ground, while clay and silt are not as suitable
because they are less stable. In colder regions, where the ground freezes in
the winter season, clay and silt are not recommended for building ground,
because the frozen ground will create movement in the building during freezing
and thawing. The ground must carry the weight of the building, which makes
marshy areas unfit for normal building constructions unless special
pre-cautions are taken, such as having raft construction as the foundation for
normally laid as concrete slabs. In areas with frozen ground, insulation under
the slabs is necessary to avoid problems with heave. Alternatively, a ring
foundation wall that goes down to frost-free ground must be used to ensure that
the frozen ground not does affect the building.
is recommended to go below 1.5 m depth, but this varies with the depth of the
frozen ground. It is important to use drainage pipes to ensure that water is
removed from the proximity of the walls to avoid possible movement.