Title: damn layer Date: 19-04-2019 Tags: moisture, brick, salt, wall, structure Image: 12-damp-protection-layer.svg 00023 DPC or damp-proof course is a barrier used to prevent moisture from propagating by capillarity. In Venice damp can be particularly harmful to masonry walls. With the Moisture comes small quantities of salt that with time will damage the structural qualities of the brick.