How Mold Grows and More: Your Mold Questions Answered - Wet & Forget Blog (2024)

How Mold Grows and More: Your Mold Questions Answered

By Wet & Forget

How Mold Grows and More: Your Mold Questions Answered - Wet & Forget Blog (1)

From fuzzy growth on foods left out a bit too long to unsightly black spots on the siding of your house, we all have issues with mold.

What is mold though? How does it grow and why? What happens to the surfaces mold grows on? When does this nuisance turn into a hazard?

Read on to discover the answers to some of your biggest questions on mold.

What is mold?

The word ‘mold’ refers to fungi which grow in the form of multicellular strands known as hyphae. Mold grows on any dead organic matter in nature but is only visible to the human eye when it forms a large colony, called a mycelium.

Unlike colonies of ants or termites, a mycelium is not made up of multiple individual organisms. It instead consists of an interconnected network of hyphae, all part of the same organism.

How does mold grow?

Mold reproduces via the production of small spores. These sporescan be compared to the seeds of a plant, though they are much smaller than seedsor even pollen grains.

Their small size makes them easy to disperse via wind and water. They can also travel long distances by clinging on to clothing or fur.

Mold spores can survive environments that don’t support normal mold growth. They will only start to grow once they land in an environment with suitable water, food, temperature, and oxygen.

Unlike plants’ use of photosynthesis to harness energy, molds (and all fungi) rely on organic matter to provide energy. Mold grows on the materials it can digest.

These substances are broken down into simple, easy to absorb substances by the secretion of digestive enzymes. This process provides the required ‘food’ for the mold.

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What promotes mold growth?

Mold requires water, food, and oxygen to grow. It also requires an environment with a temperature it can survive.

While mold cannot spread without these conditions, its spores may survive in a dormant state until conditions are suitable.

  • Temperature: Most molds cannot grow below 40° F. This is why food is typically refrigerated at 39° F. Mold grows best between77° F and 86° F, especially if the air is humid.
  • Water: Molds thrive in damp, humid, and wet conditions. They require water to grow and spread, which is why it is recommended to keep homes – especially walls and carpets – as dry as possible. Water leaks, flooding, high humidity, and condensation all provide moisture mold can use to grow and spread.
  • Oxygen: Molds are obligate aerobes. This means that they need oxygen to survive. Mold grows even at very low concentrations of oxygen, however, which makes it difficult to fight mold growth by limiting oxygen.
  • Food: Mold grows on materials that it can digest – and it can digest a lot. It can metabolize virtually any organic (carbon-containing) matter in nature, making it impossible to remove all food sources of mold from your environment.

What can mold grow on?

Mold grows on materials it can digest and use to spread. Consequently, it may grow on any organic material.

Substances from wood and paper products to dust containing dead skin cellsprovide organic ‘food’ for mold.Mold grows on and digests some synthetic materials like paints, adhesives, and textiles as well.

Mold is unable to digest inorganic materials (such as concrete, glass, and metal), but it can digest and grow on the dirt, dust, and organic residue that accumulates on them. You are likely to see mold grow on the north side of your roof and siding.

How does mold affect the surfaces it grows on?

Since mold eats the materials it grows on, those materials end up damaged or degraded. Unchecked mold can cause cosmetic damage and staining, unpleasant odors, and even the structural degradation of the surfaces.

Mold digests the carbon in the surface it is growing on. While doing this, it breaks down the material bit by bit.

The digestive enzymes eventually destroy the material, and the mold grows and spreads further to consume energy from more material. It’s important to identify the cause of any mold on your property and remove and remediate the mold as soon as possible.

What types of mold are there on exterior surfaces?

It’s rarely necessary to identify the type of mold to remove it, but some molds are more common than others. Some of the most common molds are listed below. The exterior surfaces they are commonly found onare also identified.

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Aspergillus: Aspergillus is one of the most common molds. You can find its sporesvirtually everywhere – from Antarctic soil and the interior of spacecraft to homes throughout the USA.

Found both inside and outside homes, this mold often grows on painted surfaces, wood, many types of paneling, painted masonry (including brick and masonry block), and poured concrete foundations.

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Penicillium: Another commontype of mold, Penicillium also thrives both inside and outside of the home. It commonly infests vinyl, paneling, wood, painted masonry, and poured concrete foundations.

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Cladosporium:This moldis one of the most common types of mold found on external surfaces of buildings. Cladosporiummay colonize vinyl siding, glass surfaces, windows, many types of wood, and paneling.

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Trichoderma:Trichodermais less common than the first three types of mold. Its infrequency is in part because itrequires more moisture than the others.

This mold grows on untreated lumber, pine wood and boards, decaying wood, and textiles.

No matter what mold is on your exterior surfaces, it’s important to remove it swiftly and thoroughly. This will reduce damage to the materials and structures that mold grows on.

Outdoor mold can be easily taken care of with Wet & Forget Outdoor Concentrate – an easy, gentle, and bleach-free outdoor cleaner that is safe for virtually any exterior surface.

How does mold harm your health?

Aside from the damage mold causes on surfaces, there are health risks associated with exposure to mold ranging from mild to severe. These include the onset of fungal allergy, respiratory infections, and the worsening of illnesses like asthma.

Mold exposure doesn’t always cause health problems, but many people are sensitive to mold. These people may experience “hay-fever like allergic symptoms” according to the Center for Disease Control and Prevention.

They note that while most cases of mold exposure don’t result in severe health problems, people with compromised immune systems face a higher risk of infection from molds. Individuals with chronic respiratory disease may also experience difficulty breathing as a result of mold exposure.

As exposure to mold poses a health risk to individuals with and without prior health issues, the CDC recommends a “common-sense approach” to mold contamination. They suggest thoroughly removing any mold that can be seen or smelled.

If you have indoor mold, don’t let it damage your home or health – pick up a bottle of Wet & Forget Indoor to keep your home healthy and safe.

For more information on mold, its growth, and its remediation, check out this guide by the Environmental Protection Agency.

(Photos courtesy of Dr. David Midgley, Paweesit, and Björn S….)

How Mold Grows and More: Your Mold Questions Answered - Wet & Forget Blog (2024)

FAQs

What makes mold grow more? ›

Water: Molds thrive in damp, humid, and wet conditions. They require water to grow and spread, which is why it is recommended to keep homes – especially walls and carpets – as dry as possible. Water leaks, flooding, high humidity, and condensation all provide moisture mold can use to grow and spread.

What does mold toxicity feel like? ›

If you have a mold allergy, your immune system overreacts when you breathe in mold spores. A mold allergy can cause coughing, itchy eyes and other symptoms that make you miserable. In some people, a mold allergy is linked to asthma and exposure causes restricted breathing and other airway symptoms.

How can you remove moisture to prevent the growth of molds? ›

To Prevent Mold Growth in Your Home. Keep humidity levels in your home as low as you can—no higher than 50%–all day long. An air conditioner or dehumidifier will help you keep the level low. You can buy a meter to check your home's humidity at a home improvement store.

What are the signs of mold toxicity? ›

What are the symptoms of mold toxicity?
  • Cognitive difficulties (brain fog, poor memory, anxiety)
  • Pain (especially abdominal pain, but can include muscle pain similar to fibromyalgia)
  • Unexplained weight gain or weight loss.
  • Numbness and tingling in extremities or other areas of the body.
  • Metallic taste in the mouth.
Apr 29, 2021

What kills growing mold? ›

Use undiluted white vinegar on hard surfaces in kitchens and baths. A bleach solution also works to kill mold. Mix one cup of bleach in a gallon of water, apply to the surface and don't rinse. Mix a 50/50 solution of ammonia and water.

What slows down mold growth? ›

Lower Humidity Levels Around the Mold

Managing your humidity levels is another tactic for mold prevention that also helps slow and stunt the growth of mold. In order to properly slow the growth of mold in your home, you'll want humidity levels of under 60%, though you ideally want those levels between 30% and 50%.

What can mold do to your brain? ›

Inflammation: Mold spores act as irritants, which can trigger the body to mount an immune response. This can lead to inflammation throughout the body. Inflammation in the brain can impair cognitive function, and in the case of chronic inflammation, this can lead to long-lasting cognitive impairment.

What kills black mold instantly? ›

Getting rid of black mold with white vinegar

'Bleach will kill mold spores growing across a hard surface, but if the mold has extended below the surface, then white vinegar is the best choice,' she says. 'The vinegar will penetrate to kill the mold and mildew at the root, preventing it from regrowing.

How do you get rid of mold in your body naturally? ›

Activated charcoal can be taken as a supplement to assist in the removal of mold from the body. Because of the adsorbent properties of activated charcoal, it quite literally traps toxins (like mycotoxins) in the body, allowing them to be flushed out so that the body doesn't reabsorb them.

What is the permanent solution for mold? ›

Mix one part bleach to four parts water. Wipe and gently scrub the mould until it is gone. Finish by wiping away the bleach mixture and dry the area well with a soft cloth.

What absorbs moisture to prevent mold? ›

Silica gel, made of sodium silicate, comes in bead or granular form and attracts and removes moisture from the air. Most often sold in small packets or devices, silica gel works well in room temperature conditions but can be quite expensive if being used in larger areas like basem*nts.

Why does vinegar prevent mold growth? ›

The reason why vinegar can kill mold while bleach cannot is because the vinegar has antifungal and antibacterial properties. The acetic acid that is present in vinegar has a decently strong pH of 2.5. Because of this strong pH level, vinegar is able to disrupt and stop the growth of mold, fungi, and other organisms.

How do you test yourself for mold poisoning? ›

Urine mycotoxin tests are ideal for testing yourself (and your family members) for mycotoxin exposure. They're absolutely painless, totally non-invasive, and incredibly easy to use. With just a small amount of urine, our experts will be able to spot up to 15 different illness-causing mycotoxins.

Can you test your blood for mold exposure? ›

A blood test, sometimes called the radioallergosorbent test, can measure your immune system's response to mold by measuring the amount of certain antibodies in your bloodstream known as immunoglobulin E (IgE) antibodies.

How long does it take to detox your body from mold? ›

Detoxing out mold (after confirming the individual has a clean environment) takes around a year in most cases. For these reasons, working with a professional is necessary.

What does mold hate? ›

Mold hates light. Other than moisture there's nothing mold loves more than dark places. An easy prevention against mold growth is opening your blinds and shades. If it's warm enough out, open the windows.

What is the best homemade mold killer? ›

Mix 2 teaspoons of borax with 1/2 cup white vinegar in a spray bottle. Apply the mixture on mildew and let sit for about 30 minutes. The borax will scour the surface while the white vinegar combats the mildew and mold. Rinse with clean water and allow the area to dry thoroughly.

What soaks up mold? ›

Getting Rid of Mold With Baking Soda

Add one-quarter of a tablespoon of baking soda to a spray bottle of water and shake until it has dissolved. Spray the moldy area with the baking soda and water solution, then use a scrub brush to remove mold from the surface.

What makes mold worse? ›

Mold will grow in places with a lot of moisture, such as around leaks in roofs, windows, or pipes, or where there has been flooding. Mold grows well on paper products, cardboard, ceiling tiles, and wood products.

Does leaving lights on help prevent mold? ›

Homes in high humidity areas can especially benefit from them. Lamps placed in locations of the home where mold and mildew is a problem can help to significantly reduce contamination levels. UV lights placed in HVAC systems have also proven to be very effective in reducing mold.

What temperature should I keep my house to prevent mold? ›

The ideal temperature is between 77 and 86 degrees Fahrenheit. During the summer months, temperatures are often higher than normal inside the home. Make an effort to keep temperatures inside the home lower during the summer months. Setting the thermostat to the low 70s makes it more difficult for mold to grow.

What mental illness can mold cause? ›

Mold toxicity can manifest in different ways in people. It's more commonly linked to physical problems, such as difficulty breathing, fatigue, and headaches, but research shows that it can present itself in a psychiatric way, too. This includes brain fog, depression, anxiety, problems concentrating, and insomnia.

What does living with mold do to the body? ›

Exposure to a large number of mold spores may cause allergic symptoms such as watery eyes, runny nose, sneezing, itching, coughing, wheezing, difficulty breathing, headache, and fatigue. Repeated exposure to mold can increase a person's sensitivity, causing more severe allergic reactions.

Can mold affect memory? ›

A new study found that people affected by mold illness experienced: Brain inflammation in the hippocampus, the area of the brain that governs memory, learning, and the sleep-wake cycle. Decreased neurogenesis, or the formation of new brain cells. Impaired memory.

Can I leave vinegar on mold overnight? ›

To safely and effectively clean a small area of mold, ServiceMaster advises the following: Add full-strength white distilled vinegar to a spray bottle and spray it on the mold. Let it sit for at least an hour before wiping away mold.

Is there a spray that kills mold? ›

Product Details. Moldex Mold Killer is an EPA registered 3-in-1 cleaner designed to kill, clean and inhibit the growth of mold and mildew. It destroys and neutralizes mold, mildew and their odors at their source. Bleach-free, phosphate free, non-abrasive disinfectant mold killer is safe to use on most washable surfaces ...

How do professionals remove mold? ›

Mold professionals use expensive, professional equipment such as HEPA (High Efficiency Particulate Air) air scrubbers, HEPA vacuums, commercial-strength dehumidifiers, etc. Regular handymen won't have that stuff.

What naturally eats mold? ›

Insects
  • Beetles.
  • Termites.
  • Ants.

Can Apple cider vinegar help with mold exposure? ›

Vinegar: Spray undiluted white or apple cider vinegar on the mold and let it sit for an hour. Afterwards, wipe the mold.

What foods are high in mold content? ›

Common culprits include:
  • Cheese.
  • Mushrooms.
  • Vinegar and foods containing vinegar, such as salad dressing, ketchup, and pickles.
  • Sour cream, sour milk, and buttermilk.
  • Meat or fish.
  • Breads and other food made with yeast.
  • Jarred jams and jellies.
  • Sauerkraut.
Nov 7, 2022

What vinegar kills mold? ›

Using White Distilled Vinegar to Kill Mold. White vinegar is most commonly found with 5% acidity and works best undiluted, so don't worry about mixing it with water first.

What gas kills mold? ›

Chlorine Dioxide is one of the most effective ingredients that has been used extensively for mold & mildew remediation in situations like Hurricane Katrina.

What kills mold better bleach or hydrogen peroxide? ›

In a study testing the effects of various mold-killers, hydrogen peroxide was found to be moderately effective at killing mold on nonporous surfaces, albeit less potently than bleach.

What is the best natural moisture absorber? ›

Rock Salt. The most popular DIY dehumidifier is the one that works the best—rock salt. Rock salt naturally absorbs moisture out of the air, making it a great choice to use as a dehumidifier.

Does DampRid remove mold? ›

DampRid isn't a mold remediation product, and it will not remove or kill mold from your camper. But it does work to prevent mold from growing in the first place.

How do you keep a wet room mold free? ›

Stick to a regular cleaning routine

Clean and dry your bathroom regularly, including grout and hard-to-reach corners that are prone to mould. Wash your towels and bathmats frequently, and hang wet towels and bathmats in dry, well-ventilated areas.

Which kills mold better bleach or vinegar? ›

Is Vinegar More Effective Than Bleach? Vinegar truly is better than cleaning with bleach when it comes to killing mold. The EPA does not recommend using bleach to kill or remove mold, except in special circ*mstances. In most cases, “a background level of mold spores will remain” after the application of bleach.

How long to leave vinegar on mold? ›

Let the vinegar sit for at least an hour. Using a brush with soft bristles, scrub the moldy surface until the mold comes off. If you're scrubbing a rougher surface you might need a thicker brush. Dry the area completely with a clean rag and throw away the used rag and brush.

Is Distilled Vinegar the same as White Vinegar? ›

White vinegar, also known as distilled vinegar or spirit vinegar, is made by fermenting grain alcohol (ethanol) which then turns into acetic acid. Water is then added to the vinegar, so white vinegar is made of five to ten percent acetic acid and ninety to ninety-five percent water.

What is the test for mold in the body? ›

Getting a mycotoxin test may help you determine whether you have mold toxicity in your body. This is a great way to test whether the harmful antigens in the mold are negatively impacting your health. This test may help you decide how to treat your mold exposure and allergies.

How do you know if your house is toxic? ›

What Are the Signs of Toxic House Syndrome?
  1. Mold growth.
  2. Condensation around windows and in high humidity areas such as bathrooms.
  3. Lingering condensation.
  4. Dampness that doesn't seem to go away.
  5. Dust build up in your ventilation system.

Is there a test for mold in your lungs? ›

Your doctor may also run a blood test to look for evidence of fungal spores or antibodies in your blood. An X-ray or CT scan may help them rule out other conditions and look for a buildup of mold in your lungs.

Do air purifiers help with mold? ›

Do air purifiers help with mold? Air purifiers help capture mold spores from the air, preventing them from reproducing and spreading throughout your home. While air purifiers won't help treat active mold that's already present on surfaces, they are a great way to control the spread of airborne mold particles.

Do antibiotics treat mold exposure? ›

Antibiotics are the typical solutions many doctors have come to rely on regardless of symptoms. However, mold fungus is not a typical bacteria or a bacteria at all. In fact, fungus aretheir own species of living organism that can adapt to antibiotics.

What vitamins are good for mold exposure? ›

According to one clinic that specializes in treating mold exposure in people, nutritional deficiencies they commonly find in their patients include the B vitamins (especially folic acid, B-6 and B-12), COQ10, magnesium, vitamin D, and zinc.

What foods to avoid when detoxing from mold? ›

Mold detox diet: Which foods to avoid
  • Rice. Because rice is extremely versatile, it is often used in gluten-free foods and in many cultural dishes around the world. ...
  • Coffee. ...
  • Nuts. ...
  • Dried fruit. ...
  • Alcohol. ...
  • Processed meats. ...
  • Corn.

What are the neurological symptoms of mold exposure? ›

Neurological symptoms of mold toxicity can show up as migraine headaches, tremors, pain throughout the body, imbalance, difficulty walking, and cognition issues. People affected by mold also often report episodes of heightened anxiety and depression (3).

What does mold grow fastest on? ›

Again, moisture and temperature play a large part in the quickness to mold. As moisture allows bacteria to breed, juicier fruits and vegetables, such as peaches, plums, tomatoes and cucumbers, are more likely to get moldy quicker than are those with harder peels and rinds, such as bananas, apples, peppers and squash.

What things grow mold fast? ›

Food that has a high-water content will mold faster than others. This is because mold draws from the moisture content for growth. Fruits and berries, cucumbers, and bell peppers are all high-water content produce. These will mold before other foods in the refrigerator or on the counter.

Does mold grow more in heat or cold? ›

Many fungi grow well at temperatures between 60 and 80 degrees Fahrenheit, which are also ideal temperatures for human comfort. In addition, as mentioned above, temperature gradients often produce the moisture needed for mold growth.

What time of year is mold worse? ›

Allergic symptoms from fungus spores are most common from July to early fall. Fungi grow in many places. They can grow both indoors and outside, so allergic reactions can occur year-round.

What time of day are mold spores highest? ›

Mold spores count is highest at night, especially when it's foggy, damp or rainy. Upsetting these mold spores send them into the air, triggering an allergic reaction in people who have an allergy to mold.

What time of year is mold highest? ›

Because mold grows year-round, mold allergies are not as seasonal as other allergens. However, outdoor mold levels tend to be higher in the late spring through early fall when the weather is warm and moist.

Does sunlight get rid of mold? ›

The short wavelengths of ultraviolet light are germicidal, meaning it can destroy and eliminate both mould and other germs. The sun's heat is ideal for drying out mould and moisture on clothes, furnishings and more. Sunlight kills bacteria that produce nasty mould and mildew smells.

What does mold eat? ›

Like other fungi, molds cannot produce their own food. Some molds feed on living things, but most feed on the dead tissues of plants and animals. These can be in the form of leaves that have fallen from a tree, or they can be products made from plants or animals, including foods, paper, fabric, and many others.

Which food grows the most mold? ›

Molds also tolerate salt and sugar better than most other food invaders. Therefore, molds can grow in refrigerated jams and jelly and on cured, salty meats — ham, bacon, salami, and bologna.

How does mold spread so fast? ›

Mold growths, or colonies, can start to grow on a damp surface within 24 to 48 hours. They reproduce by spores - tiny, lightweight “seeds”- that travel through the air. Molds digest organic material, eventually destroying the material they grow on, and then spread to destroy adjacent organic material.

Does keeping house cold cause mold? ›

Mold Growth- The colder you keep your home, the colder the walls, ceiling, floors, windows and more will be. Water vapor that gets into these porous materials is the ideal place for mold to grow. This also can happen when humid outdoor air gets into the home and the indoor humidity is low in the air.

What temperature does mold stop? ›

The World Health Organisation guidelines suggest 21 degrees in a living room and 18 degrees in the bedrooms, falling lower at night and when you are out. You don't need to keep your home at these temperatures all the time, but you should aim to bring it up to these temperatures at least some of the day.

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