Frost protection
Buildings , components or devices are called frost-proof ,
- which are protected against the ingress of water and its freezing out - z. B. the sub-construction of roads with a gravel or gravel bed ,
or
- which contain moisture and are insulated against the ingress of cold (actually: against the escape of heat energy ),
or
- The liquid / s contained in them are protected against freezing by adding suitable antifreeze agents (within a certain temperature range).