Dampco remediates damp


Preventing moisture and mould penetration into the building envelope is a far better course of action than trying to clean up the damage caused by moisture penetration. Obviously, no one can guard against an unexpected leak from a burst water pipe, or a sudden downpour where water enters the subfloor, but every home owner or property manager can reduce the risk of having moisture contamination in a property by adopting some simple preventative procedures.


Ventilation is the most important factor in the presence of condensation and therefore mould, followed by heating.





All properties require ventilation, internally, in the roof cavity and in the subfloor.


Internal ventilation


Without ventilation, the natural creation of moisture through everyday living - breathing, cooking, heating, cooling - will lead to elevated moisture levels in the property. Check every room of the property and make sure that each one has at least one passive vent in the wall. If not, the property can be exposed to excessive moisture and constant monitoring is required. Any property can have passive vents added to it internally, and in extreme cases, mechanical ventilation systems can be added to forcibly extract moisture from the internal living areas.


Subfloor ventilation


In the subfloor, the moisture present in the soil will cause long term moisture issues if it is unable to escape from the subfloor via passive vents. In sold brick houses, often just passive vents are not enough to prevent moisture issues and forced air ventilation systems are required. But the more passive vents the better.


Roof cavity ventilation


Eave vents or whirlygigs will relive a roof space of moisture build up very effectively. Dampco can install both.




Adding heat to any dwelling will eliminate or reduce the onset of condensation and therefore mould. By raising the core temperature of the dwelling, the internal air will be able to hold more moisture vapour in suspension as it is warm. As the air in the dwelling cools and the dew point is reached, the moisture vapour falls from the internal atmosphere and descends onto the coldest surfaces in the room, forming condensation.




Garden beds and pathways too close to or higher than an external wall can nalso lead to moisture build up in the subfloor and also ground water penetration from outside to the subfloor. Try and ensure that garden beds are not hard up against the external wall and if they are, install some kind of barrier between the garden and the wall. Pathways too close or higher than the base of the external wall can also be an issue as water can either seep (through porous bricks) or flow (via passive vents) under the house. Fitting passive vents with 'blinkers' will seal them in the event of a sudden downpour and prevent water invading the subfloor. Dampco supplies and installs 'blinkers'. Call for more details.