Rising Damp

This is a condition where groundwater is drawn upwards through direct contact with bricks and mortar.
Water rises by capillary action where inadequate or damaged damp-proof courses are present in the walls of the home.

Causes of Rising Damp

  • Old home dampproofing cause (method) was made from a bitumen-based product and had a life span of plus or minus 20 years
  • No DPC (Damp Proofing Course) ¬†as in homes with suspended wooden floors
  • High subground water levels
  • Bridging ground or pavements above the DPC
  • Pipes leaks, crack in the exterior plaster
  • Sub-soil water rising through the floor slab

Dampfinda Do’s & Dont’s

Do's

  • Remove all contaminated plaster till there is at least plus or minus 200 mm of dry brick showing on the wall.
  • Drill and inject a new DPC on the correct mortar line
  • Drill and inject vertical DPC to prevent dampness from entering the adjacent walls
  • Remove contaminated skirting boards
  • Remove contaminated cupboards
  • Replaster with the correct chemical added into the plaster mix (salt retarding) to allow the walls to dry out plus retaining the salts to add strength to the walls

Dont's

  • Scrape and paint over the damp
  • Replace the plaster without creating a new DPC
  • Leave any contaminated plaster on the wall
  • Do only the side of the wall

Conventional Treatments of Rising Damp

Since the 1950’s the conventional method to treat rising damp has been to inject silicone diluted in water or a hydrocarbon solvent into the wall. Silicone would cure inside the wall and block further moisture rising from the ground however solvent-based systems are flammable and release harmful hydrocarbons into the atmosphere. Water-based systems introduce large amounts of moisture into the walls which prolongs the drying period and are also caustic.

Dampfind’s Injection Method

  • Our Cream is introduced into a 12mm hole every 10mm into the mortar line.
  • The cream reverts into a liquid which is diffused into a mortar line.
  • Once diffused it cures to form a waterproof barrier

OUR ” VAPOUR PHASE ACTION” TECHNOLOGY

As diffusion occurs, it releases a silane vapor that permeates the masonry beyond the penetration zone. The silane reacts with silea structure within the masonry to form water-repellent resins.

Other Types of Damp

Lateral Damp

Descending Damp

Contact Us

79 Beaconhurst Drive Beacon Bay Eastern Cape 5247

043 748 2173

071 435 0469

admin@dampfinda.co.za

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