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Water Penetration and Leaks
Further considering the symptoms of rising damp and condensation, these can also arise from unintended water in your home caused by leaking pipes or deterioration of the roof and walls.
If you are concerned that this may be happening please consider the list of possible causes below particularly in the same location of the damp problems.
Blocked gutters, especially in the hidden valleys of the roof or defective rainwater pipes.
Defective valley gutters and flat roofs.
Missing, broken, displaced or loose tiles or slates.
Faulty lead flashing around chimneys.
Deterioration of mortar in brickwork joints.
Bridging over the damp proof course by soil in flower beds, plinths, or raised patio areas etc.
Blocked or obstructed air-bricks.
Cracked or broken rain-water and waste-water pipes.
Blocked grates or gullies.
Seal around window frames.
Running overflow pipes from cisterns or water tanks.
Ivy or other climbing plants damaging brickwork, gutters, roofs etc
Plumbing defects such as leaking pipes; water, heating, waste or overflow.
If timber floorboards are fitted good under-floor ventilation is important and careful attention must be given to ensure air vents or air-bricks in the external walls are clear of any obstructions.
What do I do if my home is suffering
Condensation is the most common cause of household damp problems.
It can be a problem in any home, old or new and it most often happens during the winter months as the air in your home is much warmer than the air outside. However it can also occur in summer or on very hot days and it is caused by air releasing its moisture when it comes into contact with a cooler surface; this can be seen using a glass filled with ice cubes as condensation forms on the outside surface of the glass.
Condensation occurs with any cold object, wall or window when the moist warm air comes into contact with it and typical problems occur with condensation forming on walls, ceilings, windows and furniture. If these surfaces remain wet this will promote the growth of mildew and black moulds.
This mould only grows in the pure water produced by Condensation and although black mould is the most common, mould can be many colours when growing on other surfaces such as carpets, curtains, bedding and clothing
"black mould growth is the most
common effect of condensation"
Windows are often the first place in your home where you notice the first signs of condensation; this indicates that the air in your house has too much moisture in it but with many activities in the home producing moisture, or water vapour we must all take steps to reduce this to a minimum.
Water vapour is generated in your home in many ways but the main causes are:
steam from cooking and boiling the kettle;
baths and showers;
drying clothes inside on the radiator; and
unsuitable venting of tumble dryers.
The importance of ventilation
Promoting good ventilation and air circulation around the home is very important in the prevention of condensation; this allows the air to release its moisture outside preventing future problems inside your home.
This is the technical term describing moisture rising up a wall.
Rising damp from floor level before plaster damage has taken place
Rising damp becomes evident in the form of stained walls, blistering and peeling paintwork as well as salt accumulation up to one meter high.
Rising damp can arise for various reasons, the common causes are; failure of an existing damp proof course (DPC) and bridging due to raising of either external or internal ground levels.
Ground water contains soluble salts and if it isn’t treated large quantities of salts appear within the masonry and on decorative surfaces.
A common diagnosis of rising damp is the presence of salt deposits and alternatively if black mould is on the surface, this will not be rising damp as black moulds won't grow where salt is present.
RisingAt last it is practical and proven to insert a chemical Damp Proof Course reliably, even in thick stone walls. This is because Chemical Cream Injection has taken over from the high pressure injection of liquid.
The old injection technique was hit and miss - even the ‘professionals’ struggled with blow backs, loss of fluid via fissures and the difficulty of getting a seal in crumbling masonry. Your only option then, as a private property owner, was to pay for a Damp Proofing Company to carry out the work, including the inevitable expensive replastering.
Information and Main Features of DryZone Cream DPC. This is cheaper than any Liquid DPC due to time saving.
QUICK & EASY TO INSTALL– Carefully drill the holes, blow out the dust, inject.
NO WASTAGE – Used by special container guns.
LOW HAZARD – not even rated as irritant
SPILLAGE & MESS ELIMINATED – no liquids to spill or stain
NO ELECTRIC DPC PUMP REQUIRED – No electric pumps to hire or messy, smelly fluids just simple hand pressure only
TECHNOLOGY – advanced emulsion uses active Silicone ingredient economically (Siloxane and Silane, for the technically minded) without running back out of the holes
British Board of Agrèment- BBA Test Certificate No: 02/3961 - as used by the professionals. The BBA is a Goverment Approved organisation which has been testing building materials for over 30 years. Not all damp proofing materials have passed these tests - beware of cheap imitations. click here to View BBA Certificate.