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Mould Treatment Service
Mould Treatment Service
11 Jul 2010
Cook Group now offer a mould treatment and Mould removal service

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NEW! Condensation Products video
22 Apr 2010
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We've expanded our area of coverage
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We've expanded our area of coverage for condensation control

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Dust Mites


dust mite, asthma, condensation, condensation control by the Cook Group

 What are Dust Mites?

Dust Mites are related to ticks and spiders and they actually live from our household dust. Most of this dust is actually our skin or more specifically the dead skin that we are always shedding (We know, it's a grim thought). This is one of the reasons they thrive in our bedding & mattresses, we lose a large amount of skin overnight and having such a plentiful supply of food on the doorstep (or pillow) is perfect for a Dust Mite.

In reality the Dust Mite can grow up to about 0.3 of a millimetre and luckily for us that’s too small to see with the naked eye. These creatures can be present in our soft furnishings and particularly bedding by the tens of thousands.

 In fact, all houses contain Dust Mites. Some houses, however, contain huge numbers whilst others very few. This variation does not depend on cleanliness alone it is hugely influenced by the amount of moisture (or humidity)in the house: dry houses in very cold climates or on high mountains have very few mites but houses in temperate climates and normal altitudes such as the majority of the will have many more.

Having an allergy to Dust Mites can be the single biggest cause of an asthma attack. It is estimated by the medical profession that approx 80% of asthma sufferers will have an allergy to Dust Mites.

Life Cycle of Dust Mites

 The life cycle of the Dust Mite is a 3-stage process: egg, larvae and adult. It takes about 2-3 weeks for the egg to hatch and for the larvae to grow into an adult. The adult will live for approximately a month afterwards

It is actually the droppings of the mite that cause the problems. They contain a residual enzyme that acts as the ‘trigger’ to cause the allergic reaction or asthma attack.
The droppings are between 10-20 microns in diameter, similar to the size of pollen grains. They are dry and susceptible to becoming statically charged. This means that if they are disturbed, by sweeping, hovering, shaking bedclothes etc they become airborne for a considerable period of time. Whilst they are airborne it is very easy for them to enter the bronchial system.

So why are moist houses so prone to Dust Mite infestations?

Very simply they generate the ideal conditions for the mites to thrive. They are less likely to reproduce in relative humidity levels below 65% although they can tolerate wide temperature variations (0-30 degrees C). At around 0 degrees they enter a comatose like state but are not killed at this temperature. The optimum temperature they like for breeding is around 20-25 degrees C, just about the same as most of us like to heat our homes.

Humidity however is a much more important factor and 65-75% relative humidity is ideal for the 'mites' to thrive. These are also the humidity levels that allow condensation dampness and mould growth problems to occur in homes or prooperties

What Difference will a Nuaire Drimaster system make?

 Understanding how this damaging and invasive creature thrives will help you appreciate why positive input ventilation can help to alleviate asthma attacks
It can have three positive effects on the home. 

 1. With this mode of ventilation the moisture laden air throughout the home is gently diluted and replaced with tempered, fresh, filtered and drier air from outside. The relative humidity levels will drop, so creating a humidity level and environment that is hostile to the Dust Mite 

2. The effect of continuously replacing the air also reduces the amount of airborne droppings of the mite replacing it with filtered air from outside.
3. The slight positive pressure in the house can make the airborne ‘droppings’ fall back to the ground more quickly, therefore making them less likely to be breathed in.

By adopting this method of ventilation and utilising barrier systems on pillows and mattresses (that prevent Dust Mites from entering and breeding within these ‘hot spots’) asthma attacks for those who suffer from the Dust Mite allergen can be significantly reduced. This in turn could reduce the amount of drugs needed and of course the distress of this unpleasant condition.

 © Copyright Cook Group Ltd

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Another patch of stone
Another section of chalk wall awaiting rebuilding
Another patch of stone

Fire door & dry rot
Note how the dry rot outbreak has spread through the hardwood firedoor and smokeseals
Fire door & dry rot

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