The four most common household moulds
Mould is all around us on this planet. It is an important part of our ecosystem, but in our homes, mould can cause problems to our living environment and our health. For this reason it is important to be aware of the areas of our home where mould can form. When mould is discovered take action immediately and remove the mould and if possible, cut oﬀ the supply of moisture. In our ecosystem, mould has an important job. Mould functions to accelerate decay of organic organisms. Mould essentially removes the world’s clutter and this is a good thing. It isn’t a good thing when mould starts to grow in our homes. Unfortunately, in a home mould will perform the same function as it does in nature. This means it will break down and decompose our homes if left untreated.
The study of mould is one of the more daunting frontiers of science. Scientists have estimated there are many varieties of mould, but only a fraction of known species have been named. There are many diﬀerent types of mould found in homes, and some are more common than others. The four most common types of mould found in homes are Cladosporium, Penicillium, Aspergillus and Alternaria.
Typical Eﬀects of Mould Exposure
Respiratory problems – wheezing, asthma attacks etc.
Nasal and sinus congestion or dry, hacking cough
Eye irritation – burning, watery, redness
Nose or throat irritation – sneezing, bleeding nose
Skin irritations – rashes or hives
Nervous system – headaches, memory loss, mood changes
Aches and pains
Dark colored splotchy spots on interior walls are mould, a type of fungus. The problem begins when mould spores get inside and grow where moisture is present. Homeowners who have mould growth must kill and remove the mould, then repair the cause of moisture to prevent mould from returning in the near future.
Homes with moisture problems often have mould growth on their walls and ceilings and underneath carpet. Since mould spores require moisture to thrive, damp rooms such as basements, kitchens, laundry rooms and bathrooms are usually where mould occurs. Mould growth may have a dank or musty smell and is visible on drywall and other surfaces. While killing mould is important, it must be removed because dead mould spores as well as live ones can cause adverse health eﬀects as mentioned. Mould also damages the surfaces it grows on after an extended period of time, which can require homeowners to make costly repairs to wood or drywall.