Post in ground

"Earthfast" redirects here. For the T.V. series or Earthfasts trilogy, see Earthfasts.

An earthfast shelter. The posts are buried in the ground so no bracing is necessary.

Some researchers consider sills placed on the ground, rather than on a foundation, to fall under the type earthfast construction. Fishing house without a chimney, circa 1750. The Ethnographic Open-Air Museum of Latvia

A post in ground construction, also called earthfast or hole-set posts, is a type of construction in which vertical, roof-bearing timbers, called posts, are in direct contact with the ground. They may be placed into excavated postholes, driven into the ground, or on sills which are set on the ground without a foundation. Earthfast construction is common from the Neolithic period to the present and is used worldwide. Post-in-the-ground construction is sometimes called an "impermanent" form, used for houses which are expected to last a decade or two before a better quality structure can be built.

Post in ground construction can also include sill on grade, wood-lined cellars, and pit houses. Most pre-historic and medieval wooden dwellings worldwide were built post in ground.