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 homes dampproofing cause (mylthoid) was made from a bitumen based product, and had a life span of plus minus 20 years
- No DPC (Damp Proofing Course) as in homes with suspended wooden floors
- High sub ground 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
- Remove all contaminated plaster till there is at least plus minus 200 mm of dry brick showing on the wall.
- Drill and inject a new dpc on the correct motar line
- Drill and inject vertical dpc to prevent damp entering into 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
- Scrape and paint over the damp
- Replace the plaster without creating a new DPC
- Leave any contaminated plaster on the wall
- Do only 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 amount 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.
- 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 realeases a silane vapour which permeates the masonry beyond the penetration zone. The silane reacts with silea structure within the masonary to form water repellent resins.