Condensation is by far the most common form of damp in buildings. It occurs when warm moist air carrying water in a vapour form is dramatically cooled mainly in the winter months or when the temperature outside is cool, warm air can carry more water than cool air so when cooled moisture in the air is changed into liquid form. We see this effect often on materials such as glass, wall tiles and plastic surfaces it is where we cannot see such as timber, plaster and fabrics that can lead to problems. Condensation can however, also occur in areas such as roof spaces and floor voids. Where porous materials such as wood and plaster are present this can in extreme cases lead to decay, infestation and rapid deterioration.
If condensation is present for some time it can lead to the germination of moulds this is usually your first indication that a severe problem exists. Once mould spores begin to germinate, in the right conditions they can spread quickly, with colonies of mould often occurring where ventilation is poor i.e. in corners of rooms or behind furnishings and curtains. Most properties will at some point suffer from minor condensation, which is not a serious issue. However, condensation can in some cases even be a risk to health where moulds are present and even when cleaned continue to return.in these instances we would look into installing a positive input ventilation unit.
Positive Input Ventilation
Positive Input Ventilation uses air displacement to ventilate a whole dwelling, thereby improving indoor air quality and stopping or preventing condensation problems from occurring. Predominantly designed for installation in existing properties, . A single Positive input Ventilation unit mounted in the roof space (or central location for flats, etc) supplies fresh, filtered air into the dwelling via a central hallway or landing.Basically the unit introduces fresh, filtered air into the dwelling at a continuous rate, encouraging movement of air from inside to outside. The Positive input Ventilation unit draws air through the filters (5 year maintenance free) and inputs it at ceiling level, into the hallway or landing of the property.
How does Positive Input Ventilation work?
A positive input ventilation unit gently supplies tempered, filtered air into a home using otherwise unused heat within a roof. The benefits of this are enormous;
Firstly, it means that a significant proportion of external pollutants are prevented from entering the home.
*Secondly, the use of the otherwise unused heat in the roof results in the ventilation unit providing a significant net energy gain to the home.
* Thirdly, there is no better way to ventilate a home than from the inside out via a single, centrally located, supply air diffuser. A good quality Positive input Ventilation unit, fitted in your loft, will operate at an almost imperceptible noise level. You will hardly know its there. A properly designed and installed Positive Input Ventilation unit will ensure that old, contaminated, vapour laden air in your home is continuously diluted, displaced and replaced with good quality air. The result is improved indoor air quality and an environment in which condensation dampness cannot exist. The old air exits through the thousands of air leakage points found in all homes. Indeed, positive input ventilation will even help to suppress unwanted infiltration (draughts). The installation of a low energy positive input ventilation unit will ensure the air in your home is completely replaced with better quality air around 20 times a day. This is the recommended rate to maintain good air quality.
If you have any cause for concern then it may be possible that a condensation survey could highlight the cause of the problem and produce recommendations to eliminate it.