Wood is organic because it contains resin and damp. Fungus spores thereby
get nutrition to establish itself.
The fungus grows and develops when it gets nutrition from the damp and dirt that has accumulated in joints, gaps and fissures in the paling.
As long as the paling has any remains of fungus or spores, the fungus will continue to reappear –all growth must be sterilized with Bensaltenside. The treatment also means that the surface becomes disinfected. No affections are possible.