Screw foundation or concrete foundation? The differences at a glance
Whether carport, terrace, garden house or flagpole: it always starts with the question of the foundation. The two common approaches are the classic concrete foundation and the screw foundation. Here are the most important differences.
Effort
For a concrete foundation, you dig a hole, possibly set formwork, mix concrete and pour it in. The screw foundation, on the other hand, is screwed directly into the ground. There is no excavation and no soil that needs to be removed.
Waiting time
Concrete must cure before it can bear loads. A screw foundation can bear loads immediately, so you can continue building the same day.
Removal
A concrete foundation stays in the ground until someone laboriously removes it. A screw foundation can be screwed out again without leaving residue and reused elsewhere. This is particularly practical on leased land, for temporary projects or if the garden plan changes later.
Garden and terrain
Because nothing is excavated, the terrain stays largely as it was. With our tiny houses in Wasserburg am Inn, the trees and flower beds all around remained in place.
Load-bearing capacity
How much a foundation can bear depends on the ground in both cases. There are guide values for the compressive load for every Krinner screw foundation. For load-bearing structures, specialist planning is required, whether concrete or screw foundation.
When a screw foundation is worthwhile
- Carport, terrace, pergola and garden house
- Flagpoles, lighting poles and signs
- Projects on leased land or temporary projects
- Plots where trees and flower beds should remain in place
