From the beginning, the Sennhof had a rule of silence in place, intended to prevent "moral contamination" among the inmates. Prisoners were only allowed to speak when permitted by the staff. However, it quickly became evident that the Sennhof was not an ideal prison due to its architectural conditions, which allowed inmates to communicate with each other without significant obstacles. This was particularly concerning regarding detainees, as it could lead to possible coordination of testimonies or actions. Those caught talking faced the possibility of being whipped.

Even in the 1870 regulation, it was stated, "Do not speak or associate with other prisoners." Conversations were only allowed when necessary for the completion of work or when inmates were specifically instructed to speak.

In the 1927 house rules, the strict rule of silence was no longer mentioned. However, "any conversation not related to work [...] as well as all singing, whistling, and noise" was still prohibited. Additionally, inmates were instructed to refrain from "teasing, quarreling, insulting, and cursing." It seems that the atmosphere in the Sennhof was not particularly cheerful during that time.