How Fast Does Mould Grow On Building Materials?

Under experimental conditions moulds are found to cover artificially inoculated building materials in 4-10 days. For example, fast growing strains of Stachybotrys chartarum produce visible mould growth on new water-damaged gypsum boards in 5 days. Slow growing strains of Stachybotrys take 14 days to completely cover the test materials. These observations suggest that visible mould growth could appear within 1-3 weeks after water damage. Under natural conditions mould growth is influenced by a … [Read more...]

Types Of Mold

Many people often ask what are the types of mold commonly found indoors. Generally the prevailing conditions determine the types of mold prevalent in a given environment. A highly humid environment is likely to be dominated by those molds that require a lot of water such Aspergillus fumigatus, Chaetomium globosum, Stachybotrys chartarum, Ulocladium chartarum, Fusarium solani, Trichoderma sp, while a relatively dry environment may be dominated by those molds that require less moisture to grow … [Read more...]

Black Mold: How Do You Know If It Is Toxic?

Black mold is generally thought by the general public to be toxigenic. But what is black mold? There are a number of molds that grow indoors and they appear black. Some of these are not even known to produce any significant amounts of toxins. Stachybotrys chartarum, which is incorrectly referred to as black mold is known to produce toxins. However, even the toxigenic molds do not produce toxins all the time. Several factors including substrate composition, water activity, pH and temperature … [Read more...]

My Mould Test Results Said Phoma: Is Phoma dangerous?

This is one of the questions we received recently from one of our web visitors. Phoma is one of the moulds that may be found in water damaged buildings. Other common fungi in water damaged buildings include Chaetomium globosum, Stachybotrys chartarum, Ulocladium chartarum, Trichoderma spp such as Trichoderma harzianum, Aureobasidium pullulans, and the yeast fungus Rhodotorula spp. In nature, Phoma is widespread in soil and a wide range of plants and plant materials. It is one of the most … [Read more...]

Memnoniella echinata: how different is it from Stachybotrys chartarum?

Memnoniella echinata is an indoor mould very similar to Stachybotrys chartarum. The only obvious difference between the two moulds is that Memnoniella echinata produces spores in chains while Stachybotrys chartarum produces its spores in a mass. Memnoniella echinata was previously named Stachybotrys echinata. Memnoniella echinata has a world-wide distribution and is mainly isolated from soil. Similar to Stachybotrys, it is isolated from cellulose containing materials such as paper, wallpaper, … [Read more...]