The 4 main causes of condensation are
The temperature decides how much water is carried and how far it can travel.
In a car, condensation forms on the coldest surfaces, usually the windows. This standing water can be turned back into a vapour by putting the heaters on and raising the temperature. You will use a fan on a high speed setting to force colder dry air in from outside to replace the warmer damp air inside the car.
So the dryer air from outside the car is exchanged for the damper air inside the car with the hot air acting as the transport system to turn the water into a vapour and carry that water around the car and eventually outside.
This is very similar to your home. You do not have a fan that will replace the damp air in your home several times a minute as you do in a car, so you need to work smarter.
A large extractor must be fitted in the kitchen, to remove the water vapour from cooking. This will only work if you close the kitchen door whilst you are cooking and give the fan a chance to work.
A small moisture sensor extractor must be fitted in the bathroom, to remove the water vapour from showers or baths. This will turn its self off when the moisture level drops to normal. This will only work if you close the bathroom door during a bath or shower and give the fan a chance to work.
A ceiling mounted de-humidifier can be fitted to collect the vapours floating around the house, but these are expensive, a smaller cheaper mobile de humidifier can help by placing it in the hall or in the path of the water vapour travelling around you home.
Clothes drying must be done outside or in a dryer with an external exhaust or a condenser dryer. The water collector in the condenser dryer must be emptied regularly.
If there are a lot of people in living in a small house, extra ventilation will be required.
Cold surfaces are probably the most difficult to cure. Even if you have new double glazing, 60mm thermal dry lined walls or cavity wall insulation, if you create more water than your house can suspend in the air, it will turn back into water on the next coolest surface.
We recommend that you reduce the water creation in combination with control measures at the source of the water creation first as this is a far cheaper and usually free method of treatment that you can do yourself.
The temperature should be kept below 23 degrees centigrade to reduce the water held in the air and reduce the distance that the water travels, so buy a thermometer and hang it in the hall.
Open windows, trickle vents and air bricks in the summer when the air outside is less damp than the air in your house.
Even in the winter the air outside will be less damp than the air in your home, but YOU will make the choice to stay warm and keep the windows shut, trapping the warm damp air inside.
25 Ways to reduce condensation in your home, mostly for FREE
Mould needs water to grow. The water is supplied by a regular creation of condensation in your home, by you. You can control the amount of water you create from cooking, showering, bathing, drying and by controlling the temperature in your home.
We will carry out a free survey of the property to determine of there are any faults with the property or if it is the actions of the occupiers that are causing the condensation.
All condensation is usually caused by the members of the household and therefore this excessive water vapour can be stopped.
This is carried out during the survey if the customer will let us.
We will show you in your home were the condensation is created, how it travels, were it travels to and why you could get mould growth in some areas and not others. This is free of charge.
We will clean the black spot mould and attempt to find the mould spores that are spread throughout your home. We will only use low level chemicals that are not harmful with a 1 hour return time after we have cleaned.
This costs around £300 and can be completed within 1 day. This can often be the end of the mould if the level 1 and level 2 actions are taken.
An option to paint the badly effected areas with a mould resistant paint such as alcoves, poorly ventilated corners and persistent external walls. £300 per day, most houses can be completed within 1 day.
We can fit passive air bricks or vents which attract the moisture out of a room whilst not allowing a draft in. These range from £100 to £200.
We can fit a number of Triton low carbon fans which range from £200 to £400.
We can fit professional level heat recovery units or positive pressure units which range from £647 to £977 with an estimated amount of ducting.
This will be necessary if steps 1 to 3 have not been taken and
there has been damage to the furnishings, clothes and other fabrics.
We will draw a line on the garden for example and all of the contents are placed to one side of the line. The house is cleaned using stronger chemicals, the items are cleaned and can only cross the line into your house when they are dry. This may involve using a local launderette. Items that can not be cleaned are thrown away.
The cost of this clean is around £200 per day plus launderette costs and potentially replacement costs for the items thrown away.
A less cost effective way to control condensation is the use lime based plasters in the home. The lime plaster can absorb water rather than allow it to gather on the walls. This water is released when it is warm adding a degree of control over the water condensation formation.