Wörterbuch (en): Interior door / Internal door / Inner door / Room door
de:
Innentür (f) / Zimmertür (f)
fr:
Porte intérieure (f)
it:
Porta interna (f)
es:
Puerta interior (f) / Puerta de interior (f) / Puerta interna (f)
Interior doors are only installed inside a building because they are (as a rule) not weather-resistant, do not contain any insulating materials for thermal insulation and offer relatively low resistance to forced entry from a security point of view.