damp walls from not preventing damp in home

How to Tell the Difference between Damp and Condensation

Damp and condensation are common problems in the homes of the UK, especially in the South of England. Nevertheless, you should know how to tell the difference between condensation and damp issues that are caused by various factors. 

Some issues in UK homes are caused by condensation. In contrast, other types of damp, including rising and penetrating damp, have other causing factors including rainwater ingress, defective plumbing, water leak, or poor drainage. 

It is critical to understand the difference between the two, as you must know the cause before following the treatment process. So, let’s see how to tell the symptoms of a different form of damp and condensation problems and how to remove them.

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Major Differences between Damp and Condensation

Condensation is prominent in the winter months compared to rising and penetrating dampness that causes more issues during the wet or rainy weather unless there are problems from plumbing. Besides, condensation occurs when warm moisture containing air comes into direct contact with colder surfaces such as windows, windowsills, or walls. 

The problem of condensation tends to leave black mould patches on the walls that have soft, blurred edges as compared to stains marks from penetrating and rising damp. It occurs in the places where there is no fresh air and it is still like behind furniture or a room corner. Here the damp is occurred due to condensation where there is no free-flowing air.

Damp is a huge problem for building owners across the UK. It could lead to serious damage to the property if not treated correctly and instantly. However, if left untreated for a considerable time, it will damage the plaster on the wall and cause rotting wood problems. Moreover, it causes mould on furniture and makes skirting boards, floors, and window frames rot. Also, it encourages dust mites to flourish, likely to cause respiratory illness.

Other forms of damp and condensation are often confusing, and it’s not easy to know how you are dealing. Different types of damp, including rising and penetrating damp, take a lot of time to find out correctly and can be costly for the owners in the form of treatment of damp or for carrying out its maintenance to resolve it. On the other hand, condensation can be remediated easily before excessive damage is caused.

Condensation

One of the most usual forms of damp, condensation can occur in any property regardless of how new or old. Water vapours are present in the air naturally from weather conditions and respiration from humans and plants as well. They float merrily in your home and are fairly harmless. Only when it comes in contact with a cold surface like a wall, a poorly insulated surface, or a window becomes troublesome. First, the temperature of water vapours drop, and it loses its strength to some extent. Next, it can no longer hold its water content, and lastly, it drops onto a colder surface. The deposited water what you see is when you observe condensation. 

Condensation is seen on any surface where the cold air of the outside environment contacts your house’s warmth. Poorly insulated thin walls and windows are the common places you can expect to see condensation. 

Besides, condensation is caused by everyday activities you carry out inside your home. For instance, boiling kettle, cooking, or drying wet clothes inside the home all causes condensation. The major source of condensation is a lack of ventilation. Single coated windows, lack of insulation in places, and having no extractor fans where there are chances of presence of warm moist air are factors contributing to the occurrence of condensation. 

Signs of Condensation

  • Black mould is the common sign of condensation that can occur on any wall of the building. Enough moisture in a room allows the mould to evolve and spread in the place, giving out a musty odour and resulting in respiratory illness. 
  • Collecting water on the windows is also a common type of condensation in homes. 
  • Deterioration of the plaster and peeling off paint occurs if the condensation is left untreated and not taken care of instantly. 
dehumidifier preventing damp and decreasing humidity

Rising Damp

When the moisture from the groundwater rises through the bricks in an upwards motion by means of capillary action, it results in rising damp. This is because house bricks and masonry keep on sucking up the moisture from the underground until gravity dictates so, usually around one metre. 

Rising damp is mainly an issue in the older building where the DPC (damp proof course) has become damaged or is completely absent. For example, although bricks may appear solid enough, you will find them full of voids on closer inspection. A chemical DPC helps the water from rising in such cases. 

Furthermore, rising damp can occur only on the ground floors of the building. 

Signs of Rising Damp

  • A most common way of identifying rising damp is having tide marks on walls. These marks won’t appear higher than one metre from the ground. 
  • You may observe stains and damp patches on walls appearing brown or yellow in colour. 
  • Peeling off of wallpapers but only on the lower parts of the wall up to one metre. 
  • If rising damp comes in contact with timber, it could result in its decay.
  • White salts appear on affected walls, unlike condensation. These salts are washed into the plaster and give a powdery appearance on the walls. 
  • Black mould above the skirting board is also an indicator of the rising damp. 
damp patches on internal walls causing bubbling paint above skirting board

Penetrating Damp

When the water finds its way to the inside of the property from the outer environment, it results in penetrating damp. It can occur at any level of your building. There are many factors that cause penetrating damp, with the most common being the building’s poor maintenance. For example, it can be from broken or leaking pipes, poor brickwork, or leaking gutters. Moreover, if there are any voids in the windows or doors or damage, it can also result in damp problems. 

Signs of Penetrating Damp

  • The most common indicator of penetrating damp is the damp patches found on the walls that don’t go away. These patches may appear bigger on days with a heavy downpour. Besides, these damp patches might exist on both the sides of the building walls, that is, insides and outside. 
  • If you observe any leaks or cracks in the gutters or roofs, this could prove that your property is suffering from penetrating damp issues. 
  • Compared with condensation, a similar indicator of penetrating damp is the presence of black mould on the building’s inner walls. The mould may grow in size with time and accompanied by a must damp odour. 
Penetrating damp and rising damp in old houses
Penetrating damp and rising damp in old houses

Treatment of Condensation, Penetrating or Rising Damp

There are some similarities in all three types of dampness. However, the greatest difference is how they are caused and their main source. 

If your property is experiencing signs of condensation, then it is more likely because of the poor or lack of ventilation in your building where the moist air is most likely to present. Extractor fans in moist air prone areas such as the kitchen and bathroom can be an ideal solution for it. Besides, keep the windows or doors open for a while to let the fresh air come in, and moist air goes out. In short, increase the ventilation of the property. 

As rising damp causes serious structural issues such as dry or wet rot, it must be treated quickly to cut down the investment in its treatment. Install a damp proof course which is the easiest treatment for damp proofing that can be done to remove rising damp. Besides, other rising damp treatments include electro osmotic systems. 

Lastly, when it comes to penetrating damp, it is a tricky problem to diagnose. However, once you have identified the issue, like leaky gutters or broken pipes, you can fix it immediately. 

Besides, having a damp specialist carry out a damp survey of your property is the best for you to ensure the cause of the damp issue. 

Takeaway

It isn’t always easy to tell the difference between the dampness and condensation in your home. Having damp problems at your home can be a headache, and diagnosing the cause of damp can make it easier to get rid of it and treat it. 

Given that, it has become important to contact a damp expert to ensure the damp removal from your place. If you experience any damp signs, contact our damp specialist for a survey of your property. 

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