Unhealthy Hong Kong Homes

by John Herbert

We spend many hours indoors every day, and during the covid19 pandemic many people are forced to work from home.

If you or your family are suffering from persistent illness, symptoms might include headaches, fatigue, allergy, asthma, diarrhoea, or flu like symptoms, your home could be unhealthy causing sickness. Kids are still growing, and can be particularly susceptible to different types of illness during their development.

If you want to discuss your unhealthy building, call John Herbert 2335 9830 today!

Damp, pollution, faulty drains, faulty ventilation, and water seepage are just of some of the reasons causing an unhealthy home, persistent illness in your family indicates you could have a problem. Do you regularly see your neighbour in the local GP’s surgery or in the hospital, that could indicate both families are living in a sick, unhealthy building.

In Hong Kong, medical professionals are reporting that patients appear to be ignoring symptoms and illness, and do not seek medical attention early enough! Don’t delay already seek doctors advice immediately.

#sickbuilding #sickbuildingsyndrome #unhealthy

Tips to avoid Hong Kong Tenant Complaints About Mould

Instead of handling mould after it occurs let’s try a different approach.

When a property suffers from damp and mould, the tenant suffers, but also the landlord, committing extra time and energy for handling the issue, so here are some tips for landlords to avoid mould <<<< click here

How to avoid mould in air conditioned buildings

moisture mould problems air conditioned buildings

In air conditioned buildings, the exterior vapour pressure will be higher than the vapour pressure in the air conditioned room, therefore the vapour and moisture flow is high to low (blue line in the diagram above)

Now normally this is not an issue, because a decent ventilation system will transport moisture back to the air conditioning cooling coil, it’s condensed, and safely drained away.

However, problems occur when a vapour retarder is installed (red line in above diagram) interrupting the flow. Moisture becomes trapped, and even the best ventilation system cannot transport it to the cooling coil. Instead what happens, damp, moisture, and then mould growth occurs (left of red line in diagram above).

wall-mould-800w-2

And we already know the problems associated with mould, it causes poor indoor air quality, and therefore health issues for the occupants. If the air conditioning room also happens to be under negative (relatively) pressure, as often occurs in hotel rooms, the situation is compounded because the vapour quantity is increased, accelerating the process. It should be taught in school “don’t ever use vinyl wallpaper in air conditioned buildings” because it causes mould.’

This phenomenon is not limited to Hong Kong, it occurs in hot tropical climates, whether you are in Singapore, Indonesia, Shanghai, or Hong Kong.

Furthermore, it’s the type of problem that’s not immediately apparent, mould doesn’t just appear overnight, and it is unlikely to surface within the defects liability period (DLP).

thermal-scan-101

So it is obvious, lining the external wall of an air conditioned space with any vapour retarder must be avoided at all costs. But sadly it still happens today, increasing maintenance and costs for building owners and operators.

About Kelcroft

Kelcroft based in Hong Kong provides specialist advice, including energy, built environment, and green building consulting services, advising owners and design teams, to lower the cost of building operations.

tags

#mould #mold #hongkong #buildings #hotels #maintenance

Building Science Mould (mold)

by John A. Herbert

mold mould Hong Kong

We spend many hours inside buildings every day, whether its your office, home, or place of entertainment (cinemas, shopping centres, etc.) therefore the quality of the air we breathe everyday should be a very important issue, yet our buildings often let us down, mould (or mold) being a common issue. The key to avoiding mould (mold) is minimising moisture, and one of the key measures to manage moisture is good ventilation.

mold mould Hong Kong

But ventilation alone does not tell the whole story because understanding the science, some might argue that is a lost art, is required to find identify source, and rectify problems.

Surface mould can be easily be seen, and washed down. But mould, hidden inside walls, and floors is far more difficult to detect, and once detected treated. Mould can cause health problems, allergies, for occupants, and moisture left unattended can even destroy the fabric of your building.