Definition - What does Parapet Wall mean?
A parapet wall is a low protective structural layer that is built adjacent to a roof. A parapet wall provides continuity and support in terms of water, air, vapor and thermal control. The regulation of these factors helps prevent corrosion and degradation of the roof or some other pre-built adjacent structure.
Corrosionpedia explains Parapet Wall
Parapet walls of various types exist: battlement, perforated, paneled, etc.
Battlement parapet walls are built with alternating high and low patterns; perforated parapet walls have various shapes incorporated into their design; while panelled parapet walls have ornamental fixtures.