DID YOU SAY MOLD?!
10/9/2024 - 3 MIN
Is it a big deal? It sounds like a big deal. I heard it was not a big deal. Is it really a big deal?
I hear many different opinions on whether or not mold is a big deal, ranging anywhere from "Mold, oh it's nothing" to "OMG, it's so awful". It appears people don't really understand the impact it can cause unless they understand how mold works, or they, or someone close to them has been affected by it personally.
So let's set the record straight. The answer: It CAN, ABSOLUTELY be an enormous deal. See Our Story - A Deeper Dive. Mold can damage your house and your health (not to mention your finances!), but how much damage depends on a number of factors:
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Mold species - they can be allergenic, toxigenic, or pathogenic
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Mold levels of the space
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Duration of exposure
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Your body’s ability to process the mold
Health issues can result not just from the spores, but also from the toxins, fragments, and chemicals that mold produces. Even if the mold is "dead" (not active), it can still induce symptoms. Some effects of mold include: Asthma, allergic reactions, cognitive issues, mental health issues, and immune system and inflammatory issues.
Molds are everywhere, and there are thousands of species. Their spores are spread via air, so any place that air goes, mold spores go too. Mold spores will start to grow and colonize when 3 things are present:
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Moisture (this can be bulk water, like a roof or plumbing leak, flood, humidity, or condensation)
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Oxygen
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Food source (wood, leaves, paper, household dust, etc)
Molds survive by digesting the thing they are growing on and will eventually destroy it. The crucial piece of information here is that moisture is the control mechanism.
While mold is a common occurrence outside, it should not be growing inside of a building. If it is growing inside, mold levels can exist in much higher concentrations than you would experience outside. Therefore, the critical steps to protect your health and the health of your house is to find the moisture source, fix the moisture source, and remove the mold. Removing the mold, without fixing the moisture source, will not solve the problem. Despite what some sources may tell you, killing the mold with bleach or other killing agents (like fungicides, ozone, UV, etc.) is a bad idea. The agents many times can be toxic themselves. They can also create more dangerous situations by producing very high concentrations of smaller fungal fragments and unsafe, unpredictable chemicals in the air.

'Nough said.

A little bit of humor to lighten the load. I just can't help myself. My 7 yr old is really good at drawing cartoons, but I might be biased.
If you experience a water incident, it's best to have the problem fixed and dried out within 24-48 hours, as this is about how much time it takes for mold to start growing. Correcting problems in a timely manner we discuss further in The Importance of Maintenance. If the mold is already present, it’s best to consult a professional before disturbing the mold. Disturbing it can exacerbate the problem. You first want to hire a licensed mold inspector, who can advise on how to remove it safely and if remediation and small particle cleaning are recommended. Not all mold inspectors are created equal. Speaking from experience, it's important to find a very thorough inspector that is well versed in building science and understands health implications of mold and their protocols. If you suspect mold, but have not found it, there are other tests you can use without an inspector to help you assess the mold/toxin levels in your house.
You will never have a 100% mold proof home since humans built it and nature is unpredictable. You can make your house mold resistant though, by keeping mold levels low and keeping accidental moisture out.
We can help you create a mold resistant home by using Building Science and Building Biology principles during the design phase and the construction phase. The way we work proactively protects your structure and therefore you!
Specifically, we look at:
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Drainage of your site
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Control Layers of your building envelope based on your climate
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Air sealing
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Material choices, storage of those materials prior to installation, and protection during construction
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HVAC systems, ventilation, dehumidification, and air filtration
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Sensors, alarms, and monitors
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Maintenance guides and cleaning regimens
While mold is a crucial piece to how a water damaged building can cause health issues, it's not the only one. Bacteria and a general breakdown of damaged building materials can as well. If you are having health issues and think your house might be the cause, consult a doctor with mold and/or biotoxin illness experience.
References and further reading:
Prescriptions for a Healthy House | John C Banta, Paula Baker-Laporte, FAIA and John Banta, CIH
A Brief Guide to Mold, Moisture and Your Home | US EPA
Mold and Your Health (nih.gov)
Merritt Wellness, From Moldy to Healthy and Fungal Fragment Dangers, pamphlets