Notable Types of Mold in Homes

Long Beach Water Damage Experts

Notable Types of Mold in Homes

Mold is more than unsightly. Mold can be dangerous to your health if it is not treated. Many mold species can go untreated for weeks, months or even years.

While mold spores have been shown to have an adverse effect on indoor air quality, they are more dangerous than other pollutants like dust and smoke.

This post will provide information on seven of the most common molds found in homes, their potential health consequences, and ways that homeowners can prevent them.


Alternaria is one of the most allergenic molds that can be found in homes. It grows wherever there is dampness.

Alternaria, a velvet-textured mold that has dark brown/green hairs and is commonly found in carpets. Alternaria can also be found under (leaking) sinks and in bathtubs.

This mold can cause asthma and allergies.

The mold can take root and spread to other areas of the building from water damage. It spreads quickly so it is important to get mold remediation done immediately. It is best to have water damage professionally investigated and repaired to stop the growth of mold in your home.


Stachybotrys, a toxic mold, is also known as Black Mold. It is usually black or dark-greenish in color and can be found in laundry rooms, basements, and on wet carpets or bathroom ceilings. This mold can be found in cellulose materials like cardboard, wood, and wicker.

Black Mold can cause headaches, fatigue, respiratory problems, skin/eye irritation, and even sleeplessness.

Black mold thrives in moist areas where there is high humidity for several weeks. The best method to stop black mold growth in homes is to maintain a relative humidity level of 50%. It is important to prevent moisture from building up in the crawlspace and basement.


Aspergillus, a mold that can cause allergic reactions and other toxic effects in the body, is very common in American homes. This mold comes in a variety of colors and textures, with more than 185 species.

This mold can trigger allergic reactions and make existing lung conditions worse. Some mold species have been known to produce Afloxin (a cancer-causing agent)

Experts recommend using HEPA-certified filters to stop Aspergillusspores from entering and accumulating. When there is construction or digging activity nearby, it is important to shut the windows.

It can be found in damp walls or on wet surfaces once it is inside a house. Aspergillus has long, flask-shaped moldspores. On contaminated surfaces, the mold colonies may form thick walls. It can also be found in piles of leaves and compost piles.


Aureobasidium, an allergenic mold is often found in grout and caulking in bathrooms or kitchens. It can also be found behind wallpaper, painted walls, and furniture made of wood.

Aureobasidium is pink or black in color and can cause asthma, hypersensitivity pneumonitis, hay fever (HP), a lung disease that causes inflammation of the lung tissue, and hypersensitivity. The mold can cause dermatitis or rashes if touched.

Aureobasidium is also known as tertiary colonizers. They require high levels of moisture to germinate indoors.

It is important to protect surfaces like tile grout, window frames and shower curtains from mold. They should not be left damp for too long. This mold can also grow on painted surfaces if the RH in a building is higher than 75%.


Chaetomium, an allergenic and pathogenic mold is often found in buildings that have suffered extensive water damage.

It is a cotton-like mold that can cause sinus problems, asthma, and hay fever. The mold’s color changes from white to grey to brown to black.

The mold is also thought to be carcinogenic (carcinogens can promote the development of cancer) as well as Teratogenic (teratogens may cause physical or functional defects in the human foetus).

The best way to stop Chaetomium growth is to cut off any moisture sources, such as a roof leak, basement leak, or attic water leak.


Penicillium is a common household mold. It can grow wherever its spores find moisture. Penicillium, an allergenic mold is known for its velvety texture. This mold infestation is distinctively blue- or green in appearance.

Penicillium can cause hay fever or lung inflammation.

This mold can be found in buildings and homes with water damage. The spores can spread through the air and into other areas such as walls, carpets, insulation, and ducting.

To prevent Penicillium growth, homeowners should quickly fix water problems. If left untreated, it can spread quickly from one room to the next, even within a few days.


Fusarium is an allergenic mold. It can be found in soil from home gardens. If mold spores land on moist or wet surfaces, it can also grow indoors. Fusarium can cause allergic reactions. It is usually pinkish, reddish, or white.

Researchers have found that prolonged exposure to mold can cause serious health problems such as brain abscess/infection.

Fusarium can be spread and grow even in cold temperatures. It is important to immediately remove the mold from your home and remedy any problems that may have been caused by it.