跳至正文

WHAT IS RISING DAMP

Rising damp is a natural physical phenomenon caused by ground moisture rising up a permeable masonry wall by capillary action. Water molecules have been shown to form dipoles (like magnets) that orient themselves to travel upward through the pores in walls.

A bit of science to understand the process of rising damp?

The water flowing in fault lines under a building create, through friction, an electric charge of between 50 and 500 millivolts. This capillary tension draws water up from the ground (+) into the walls (−).

Rising damp is charactersed by the presence of mineral salts in the walls, such as nitrates (derived from animal wastes), and sulfates (from rock).