29/04/2016
WALL DUMP PROFFING SOLUTION JAIPUR
Damp, Mould and Condensation
If you are the occupier of a dwelling and have reason to be bothered by dampness then you owe it to yourself and your family to explore the causes of this dampness and put a stop to it, or at least reduce its impact on your health and enjoyment of your property.
TYPES OF DAMPNESS
There are four main types of dampness that could affect your home. It is essential that you take the time to identify the true cause of dampness in your property so that you can diagnose the correct solution.
1. Rising Damp
This is caused by water from the ground rising into the home by penetrating or bypassing a defective damp proof course (DPC). The DCP is the line of black material, usually seen between two rows of bricks about 6 inches (150mm) above ground level. Rising damp will only affect basements and ground floor rooms, up to a height of 12 to 18 inches (300mm to 450mm). It will be seen all year round (usually as a ‘tide mark’ low down on the wall) but is more noticeable in winter. If left untreated it will lead to crumbling wall plaster in that area and lifting wallpaper.
2. Penetrating Dampness
This type of dampness will only occur on external walls. It will only appear because of a defect outside the home, such as defective eaves gutters or down pipes, which permits water to pass from the outside to the inside. This type of dampness is far more noticeable following a period of rainfall. The affected area looks and feels damp to the touch.
3. Defective Plumbing
Leaks from water and waste pipes, especially in bathrooms and kitchens, are relatively common. They can affect both internal and external walls and ceilings. The area looks and feels damp to the touch and remains damp whatever the weather conditions outside. A quick examination of the water (and waste) pipes serving the kitchen and bathroom will usually find the problem.
4. Condensation
This is by far the most common cause of dampness experienced by householders in the Borough, accounting for over 95% of all enquiries or complaints, concerning dampness, received by the Council. Condensation is caused by water moisture from inside the dwelling coming into contact with a colder surface, such as a window or wall. The resultant water drops (or condensation) may then soak into the wallpaper or paintwork or even plasterwork and attract black mould to grow on its surface.
Condensation mainly occurs during the colder months, whether it is rainy or dry outside, and is usually found in corners and north facing walls, on or near windows; also in areas of little air circulation such as behind wardrobes and beds, especially when they are pushed up against external walls.
HOW TO COMBAT DAMPNESS
1. Rising Damp
Once identified, and before calling upon any specialist for advice, it is well worth doing some preliminary investigations yourself. For instance, exterior pathways and soil levels should be at least 6 inches (150mm) below the black line of the DPC. Where soil has crept up to or even over this line it is essential that it be dug away. This is especially important if the soil supports dense vegetation. Similarly paths should not rise more than 6 inches below the DPC. In homes with wooden floors it is also important to spot airbricks and ensure they are clear of obstructions and debris.
If none of the above applies then it may be the case that your existing DPC has perished with age and a new one has to be inserted. Or, it could be that the DPC being bridged by render on the outside (or plaster on the inside) running to ground level.
If you are an owner-occupier then it is probably best to call on the services of a Chartered Building Surveyor or recognised damp proofing specialist They can usually diagnose the cause of the rising damp, suggest remedial action the finished product.
2. Penetrating Dampness
This type of dampness will only occur on external walls. Examine the exterior of your property in the area of the dampness, looking for broken eaves gutters, down pipes, missing tiles, poor chimney flashings or perished mortar or sealant around windows. More rarely, you may see areas of old perished brickwork and open jointed brickwork. Any of these defects could allow water to pass to the inside of your home.
If you are an owner-occupier then you should call on the services of a reputable contractor to repair the problem. Only attempt to repair the defect yourself if you are competent at DIY and can do the work in a safe manner.
3. Defective Plumbing
Examine both the ‘clean’ and ‘dirty’ pipe work in your home for leaks, especially at joints and unions. If you find a leak either call on the services of a reputable plumber or, if you are competent at DIY, repair it yourself. More rarely the dampness problem could be due to a blocked waste pipe, causing water to ‘weep’ from the joints. This is usually noticed when sinks, baths or WC’s are slow to discharge their contents. Again, either clear the blockage yourself or call on the services of a reputable plumber or drain clearance specialist.
4. Condensation and Associated Mould Growth
This is caused by an occupier’s living and lifestyle. Cooking, washing, drying clothes indoors, even breathing, all produce water vapour which can only be seen when tiny drops of water (or condensation) appears on colder surfaces such as walls, windows and ceilings.
The ‘amount’ of condensation in a home depends upon how much water vapour is produced by the actions of its residents and how cold or warm the property is. Condensation is usually less apparent in the warmer months or where adequate central heating is used. The warmer the property, the more water vapour the atmosphere can hold before it condenses onto colder surfaces. Or, put another way, the higher the temperature, the higher the relative humidity (RH). As a general rule of thumb, a RH of over 40% is desirable for normal modes of living, but a RH of over 70% will lead to condensation problems.
Simply turning up the heating will not sort out the problem; this will only temporarily reduce condensation. Unless the amount of moisture is reduced, then condensation will result.
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