In order to prevent the biodegradation of building materials it is fundamental to preserve and maintain all buildings to allow them to remain watertight.
Defects permitting the access of water into a buildings fabric must be remedied to prevent further entry of water.
Below is a list of some of the ways in which water can penetrate into a building, causing dampness:
- Blocked gutters, especially hidden valleys
- Defective rainwater goods
- Defective surface to flat roofs
- Missing/broken/loose/displaced roof tiles or slates
- Faulty flashings
- Uncapped disused chimneys
- Defective pointing
- Faulty or missing damp proof course
- Bridging of damp proof course (e.g., high soil levels, patio, garden ornaments etc)
- Blocked air vents/bricks
- Obstructions within cavity walls
- Overflow from cisterns/water tanks
Water ingress through any of these measures can lead to Hygroscopic Salt Contamination.