subject: Rising Damp: Occurs In The Building Through Porous Materials [print this page] Rising damp usually occurs in the building when the porous materials rejoice in bricks, mortar and solitaire come in direct combat with humid matter namely Earth. The signs of damp are:
Ugly spotting will appear on the wall coverings corresponding as wallpaper and paint.
A salt like content will turn up on the wall mastery and form the patches.
Water is a good conductor and trim through the solid backing of masonry can radiate heat at a malignant percentage and play a big example in the cost of heating your home.
Dampness in the house also has adverse affects on the health seeing it promotes the accretion of fungus. It can cause dangerous diseases rejoice in asthma, heart problem and many other dangerous diseases.
It can and embark on the decay of timber, if not detected earlier it can advance timbers besides if not treated can result in the overturn of complete structure of building.
Water rises up the wall from the wettest part of the ground under the response of capillary forces. There can be little or no evaporation below ground level. In many walls which lacks a moist contact membrane (or in which it is defective) water rises from ground butcher by capillarity.
The dampen beatitude of the masonry units follows the wetting curve of the masonry material and the water content of the mortar joints follows the wetting curve of the mortar cloth. In many situations, evaporative drying has a controlling influence on the capillary rise process, and the extent of rising damp in walls is thereupon determined by the balance between upward flow of water from the ground and evaporation of moisten from the wall surfaces.
Rising wet stabilizes at that height at which the total capillary inflow at the plant of the walls equals to consume of evaporative loss over the uncondensed humid affected region.
