The lack of adequate waterproofing poses a very real threat to the structural integrity of houses and buildings. Needless to say, it also threatens the contents and health of its occupants.
Whether building a new structure, plastering, laying a screed or renovating an existing building, Coprox Waterproof Cement Additive was designed for any type of building work where there is a possibility of damp occurring.
How does it work?
When mixed with mortar, screed, unreinforced concrete or plaster, the crystalline properties of Coprox Waterproof Cement Additive render these structures and surfaces impervious to the ingress of moisture, thereby providing primary waterproofing.
And according to the company, it is an essential ingredient in the construction of structural, retaining and boundary walls, floors, showers, basements, wine cellars, underground parking, ponds, swimming pools, reservoirs and water features for the prevention of rising, falling and penetrating damp.
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Common damp problems
• Rising damp:
Rising damp occurs as a result of capillary suction of moisture from the ground into porous masonry building materials such as stone, brick, earth and mortar. It potentially occurs where there is no damp-proof course (DPC), or where the DPC has been damaged or bridged. The normal limit for rising damp generally ranges from 0,5m to 1,5m above ground level and this may affect the base of a whole building.
• Falling damp:
Falling damp is caused by downward water penetration from the top of porous masonry walls. This could happen if the top of a boundary wall (coping) is not adequately waterproofed, or because of failed flashings, blocked or leaking gutters, joints that have lost their mortar, and the build-up of dirt and moss on upper surfaces of stone or brickwork. Fallen leaves, bird manure, moss and dirt also contain weak acids and salts, which, if carried by water into masonry, can promote decay.
• Penetrating damp:
Penetrating damp occurs as a result of the horizontal ingress of water through gaps (sometimes tiny) in a building’s substrate. Penetrating or horizontal damp can be due to leaking water pipes and unprotected plaster or brick. Air-conditioning drips and hot-water system overflows can also cause problems. Penetrating damp tends to produce localised patches of dampness and decay.
Caption main image: To prevent damp in buildings, add 2,5kg of Coprox Masonry Waterproofing to every 50kg bag of cement when applying mortar, screed, unreinforced concrete or plaster. Follow the instructions and make sure that recognised building mix standards are adhered to.
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