Damp Proofing Solutions
The use of a water-based silicone injection is generally regarded as the most effective type of damp proof course to prevent moisture rising through a wall and leading to rising damp.
Installation of damp proof course:
• Dependant on the thickness of walls, holes are drilled in the mortar / brick of external and internal walls to a pre-determined depth and at the correct level and spacing between holes.
• These holes are then injected with damp proofing material to reduce the movement of water through the capillaries.
Following the insertion of a damp proof course it is common for re-plastering to be required. Any new plastering has to prevent damp and salts present within the wall migrating onto the internal wall finish.
Rising damp is the action of water moving vertically through porous building material in contact with the ground. This is brought about by the drying action of air on the upper surfaces which causes the wall to act like a wick, drawing water upwards from the ground by capillary action, which then evaporates from the surface into the atmosphere.The moisture will continue to rise until it reaches a height where no evaporation is possible; gravity then takes over and pulls it down again.
The Electro Osmotic Damp Proofing system
The Electro Osmotic system is increasingly accepted as an alternative to fluids and physical damp course. The Electro Osmotic Damp proofing sytsem is unique in the way it uses titanium and platinum group elements to carry all positive voltages.
After the titanium damp course has been fitted a small voltage is applied to the titanium via the power unit. Immediately all the titanium wire in contact with the wall and anode sections will conduct electricity. The nett result is equivalent to having one continuously conducting anode so enabling a very rapid build up in the wall potential.
After a period of time an insoluble film of titanium dioxide will build up at the titanium/wall interface. Once the film has become established there is very little further electrical conduction from the titanium and corrosion ceases as long as the proctive voltage is applied. The anodes will naturally continue to conduct so maintaining the wall potential.
To summarise, it can be said that the system if virtually self healing – Scratch or abuse the titanium and it will quickly form another protective skin. This type of system is often used on Flint walls and listed buildings.