Koch method is based on the principle that the speed of humidity absorption is directly proportionate to the masonry-groundwater contact surface, therefore, replacing the continuous walls with arch structures, carved in breaches below the areas to restore, rising humidity is reduced to the springer of the arches.
Koch method: what it is
Demolition and removal of material for making small arches, with the aim of creating a certain number of "discontinuities" and consequently, reducing the contact section between the masonry and the ground, limiting the humidity amount potentially rising on areas in elevation.
Absorbent section reduction (or Koch method): how it works
In all phenomena concerning materials capillarity, the rising water height depends directly on the ratio between evaporating surface and priming surface, so making a series of discontinuities at the masonry base, of number and dimensions compatible with the static of the vertical closure to restore. Therefore priming surface will be reduced and the evaporating surface will be increased, also calculating holes perimeter surface in the masonry thickness.
How to implement Koch method
The protection method which prevents or reduces rising damp, known as "Koch method", is carried out by executing masonry works, that may be summarized in three main phases: in the first one waterproof plinths are arranged "in breaches" , and then the arches will be set above them, in the second one the arches themselves are also built in breaches, but without using anti-capillary material, in the third phase damp masonry below the arches is removed.
Pros of Koch method
No appreciation was found.
Cons of Koch method
- significant alteration of the building static
- very limited use since its application is not always possible, both for static reasons and for architectural and functional ones.