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Are you staring at your mold test results feeling confused and concerned? You're not alone. Understanding mold test reports can feel like deciphering a foreign language. In this comprehensive guide, we'll break down exactly what those numbers and technical terms mean for your home and health.

Types of Mold Testing Explained

When investigating potential mold issues, professionals typically use two main testing methods:

Surface Sampling

Surface sampling directly targets visible suspicious growth to confirm whether mold is present and identify the specific types. These tests are performed using:

• Tape Lift Samples: A clear adhesive tape is pressed against the suspect area, "lifting" mold spores for laboratory analysis
• Swab Samples: A sterile swab collects material from the suspect surface

Surface sampling is ideal when you can visibly see discoloration or suspect growth. These tests tell you exactly what's growing on a specific surface but don't necessarily reveal the full extent of airborne contamination.

Air Sampling

Air sampling captures microscopic airborne mold spores that may be circulating throughout your home. This method involves:

• Running air through a specialized collection device
• Capturing spores on a slide or culture medium
• Laboratory analysis to identify types and quantities of mold present

Air samples provide crucial information about what you're breathing. They can detect problems even when mold isn't visible, making them essential for thorough assessments.

Most professional inspectors use non-viable air sampling, which counts all spores regardless of whether they can grow (viable) or not. This approach recognizes that even dead mold spores can cause health issues.

Understanding Your Mold Test Report

When you receive your mold test results, you'll typically see:

1. Types of mold identified: Different species names (like Aspergillus, Penicillium, or Stachybotrys)

2. Concentration levels: Usually shown as spores per cubic meter (spores/m³) for air samples

3. Comparison data: Indoor vs. outdoor levels and/or between different rooms

The interpretation is where many homeowners get confused. Here's the crucial point: There are no federal or state standards for "acceptable" mold levels in homes.

Why There Are No "Safe" Mold Standards

Unlike other environmental contaminants, mold doesn't have government-established Maximum Exposure Limits (MELs). This creates confusion but happens for several scientific reasons:

• Individual sensitivity varies dramatically - what affects one person may not affect another
• Sampling techniques have inherent limitations and can give different results even in the same space
• Mold species have different health impacts - raw numbers don't tell the whole story
• Limited research exists on precise exposure-response relationships in humans

Instead of rigid standards, professional mold assessors follow general interpretation principles based on:

1. Indoor vs. outdoor comparison: Generally, indoor mold counts should be lower than outdoor counts

2. Composition analysis: The types of mold found are often more important than total numbers

3. Distribution patterns: How mold types are distributed throughout the home

Red Flags in Your Mold Report

While there's no magic number that indicates a problem, certain findings should raise concerns:

1. Water-Damage Indicator Molds

Some mold types rarely appear in significant numbers without a moisture problem. High indoor levels of these "marker fungi" strongly suggest water damage:

• Aspergillus species
• Penicillium species
• Stachybotrys chartarum (sometimes called "black mold")
• Chaetomium species
• Ulocladium species

Finding these indoors at higher levels than outdoors almost always indicates a moisture problem requiring attention.

2. Indoor Levels Exceeding Outdoor Levels

Since mold naturally exists outdoors (in soil, mulch, and vegetation), outdoor air typically contains more mold spores than indoor air. When indoor levels exceed outdoor levels, especially of specific mold types, it suggests an indoor mold source.

3. Unusual Distribution Patterns

Different rooms showing dramatically different mold profiles can help pinpoint problem areas. For example, significantly higher levels in a basement compared to upstairs living spaces might indicate basement moisture issues.

Beyond the Numbers: What's Causing Your Mold Problem

The most important part of mold testing isn't just confirming its presence – it's understanding why it's there in the first place.

Mold requires moisture to grow. No exceptions. Finding the water source is essential for long-term resolution. Common culprits include:

• Leaking pipes or plumbing fixtures
• Poor drainage around foundations
• Roof or window leaks
• Condensation due to inadequate ventilation
• High indoor humidity (above 60%)
• Previous water damage that wasn't properly remediated

A comprehensive mold assessment should always include a thorough inspection for water intrusion and humidity issues.

Next Steps: What to Do After Receiving Mold Test Results

If your results indicate a mold problem, follow these steps:

1. Address the moisture source first - Removing mold without fixing the water problem guarantees it will return
2. Determine the extent of contamination - Small areas (under 10 square feet) might be manageable as a DIY project
3. Consider professional remediation for larger problems, especially if water-damage indicator molds are present
4. Create a remediation plan that includes containment to prevent cross-contamination
5. Consider post-remediation verification testing to ensure the issue is resolved

FAQs About Mold Testing

Q: Can mold testing tell me if my home is safe?
A: While testing can identify problematic conditions, there's no universal "safe" threshold. Results should be interpreted alongside visual inspection findings and health concerns.

Q: Should I test for mold if I can already see it?
A: If visible mold is present, testing may not be necessary except to identify specific species or determine airborne spread. The priority should be addressing the moisture source.

Q: How often should I test for mold?
A: Most homes don't need regular mold testing unless there are ongoing moisture issues, known health concerns, or after water damage events.

Q: Does the type of mold matter, or is all mold bad?
A: While all molds require moisture control, certain types (like Stachybotrys or Chaetomium) more strongly indicate serious water problems and may produce more potent allergens or irritants.

Need help interpreting your specific mold test results or addressing a mold problem? Our certified mold assessment professionals can provide personalized guidance. Contact us today for a consultation.

[Learn more about our mold inspection and remediation services →]

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Mold is a byproduct of water or moisture.  Fixing the source is step one in remediating mold.  

Mold Remediation is a multi-step process that includes the removal of the mold from impacted surfaces (Hepa Vac), the application of a post-cleaning fungicide, and lastly application of a fungistatic coating on organic surfaces.  

The fungistatic coating is typically white or clear and applied to organic wood surfaces to allow the treated surface to resist mold growth.  The coating can also stop the wood from absorbing moisture, which is what allows mold to start to grow.

This is all performed in a manner to try and contain the mold spores, so they are not spread to other rooms in the building.  You must also be diligent in looking for additional sources of water/moisture that fueled the mold growth.   Commonly, there are more than one cause of the mold growth.

Since only 11 states have mold regulations, the work performed in all other states is questionable as you have no specified quality of service.   Meaning what should be performed to remediate mold is not always completed.  If the white coating is not a mold-resistant coating i.e., paint, mold would be expected to grow as paint contains organic material that can foster mold growth. Mold-resistant coating (fungistatic) costs significantly more than paint, and many people will use paint to save money.  

Mold Remediation Failures

If the company performing mold remediation is unlicensed, which most are and they do not follow industry protocols, expect corners to be cut and your mold remediation to be a failure.   Mold remediation failures come from a lack of clear objectives and protocols that the company should utilize to remediate the mold.

The photo below shows areas that were missed when applying a mold-resistant coating which allowed mold to grow.

 While a remediated space does not necessarily have to appear like a freshly painted room, the area should visually indicate that treated surfaces are coated or covered. As the name implies “fungistatic coating” must coat all organic surfaces to be effective. The better coatings come with a 10-year warranty to prevent mold growth.

Expert Mold Advice

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Are you buying a house with mold? Is mold harmful? Should I be concerned about mold?

Mold is ubiquitous in our environment, but not all homes have mold and visible mold growth is a sign that something went wrong.

Mold can have an adverse health effect on people. Mold affects different people differently. Clearly if you are not allergic to peanuts or dairy products, consumption of these food items (within reason) will not cause you harm.  The problem with mold is people are subjected to it unknowingly after they move into a new residence and after days, weeks or months health concerns arise.   

Should you have a mold inspection prior to a home purchase?   Yes, if you want to ensure the home doesn't have mold, years you should have a mold inspection.

Mold can be harmful in a variety of ways.  Inhaling mold spores creates a reaction, which is your body finding that it doesn’t like the mold and your body fights the spore.

Think about how pollen can create a reaction in susceptible people. Now certain molds can produce mycotoxins and microbial volatile organic compounds which can affect humans. These are created by mold growing, you are inhaling these compounds when you smell the musty odor associated with mold.

Understand mold digests organic material, a great example is how mold breaks down your compost pile outside. So mold in a building will consume organic material, such as paper, sheetrock, cellulose, wood, and other items. As these materials are consumed, compounds are made (think stomach acids) by the consumption of the material as well as the building materials breaking down into other compounds. Paint is paint, right? Or is paint a number of compounds that are the ingredients of paint? The paint is present on a sheetrock wall, when this wall has mold growth, mold breaks down the paper and the paint causing off-gassing. A person can be allergic to the compounds that mold creates when consuming your home. Now mold is really resilient and will grow when conditions permit the mold to grow and will go dormant when the conditions are not conducive for mold growth. So, if you add water and warmth to a room, mold can grow. Take away the water and put temperatures below 50 degrees and mold goes dormant, waiting to grow another day. If you intermittently smell a musty odor, it mold gets wet and grows. The smell goes away when the water goes away. This situation means you have a water leak that is intermittent.

Mold inspections can test for hidden mold and molds that are not actively growing. An abundance of invisible airborne mold spores can be a health hazard to humans when inhaled.

Is mold everywhere? Yes pretty much anywhere on earth mold is present, that said we have completed thousands of mold inspections, and not all inspections find mold. So if someone tells you every home has mold, well, it may be accurate, but it depends on what level of mold growth and airborne spores are present.

When Mold is present it points to an issue, could be a water issue, moisture, leak and much more. Want to speak to a mold expert?  

856-858-9509

How to read mold testing results.

A Mold Survey involves mold sampling for the presence or type of mold. Mold sampling is completed in two ways, mold surface sampling and mold air sampling. Mold surface sampling is completed on a surface that is suspected to contain a mold-like substance, this type of sampling can be completed by performing acquiring a mold tape lift sample or a mold swab sample. Both methods involve acquiring a sample of the mold-like substance and having the sample analyzed by a laboratory. Your results should determine the type and quantity of mold. The interpretation of sample results pertaining to mold concentration has to be evaluated objectively when the analysis finds mold as you are sampling an area that has a mold-like substance, which can typically represent the suspected highest concentration (worst area), otherwise, why would you sample that particular area. The other type of mold sampling is mold air sampling. Mold air sampling is accomplished by running air through a laboratory containing that that captures microscopic airborne particles (fungi). The sample container is then analyzed by a laboratory for mold type and mold quantity. The analysis can be studied for both viable molds, meaning the sample is studied to see if the mold spores grow or by non-viable meaning, it what is the overall type and quantity of mold found. Mold non-viable air sampling is more common as it has been established that mold spores alive or dead can be an irritant.

Once you have the laboratory analysis completed, you now have to discuss the results and what they mean. Unlike soil and groundwater samples where all states have specific government-established standards, with mold there are No Federal or State Agency established concentration standards (Maximum Exposure Limits- MEL) or threshold level values for airborne indoor mold or for surface sample analysis of mold. Therefore, if you suspect there is a mold problem and have air testing or surface sampling performed, there is no regulatory standard to compare your results against. Without government standards, there is no common industry standards standard. The reason that there are no standards is that setting exposure limits or MELs would be difficult for a variety of technical reasons, which include limitations in both mold surface sampling and mold air sampling techniques, individual variability in sensitivity to microbial exposure among the human population, the occurrence of different types of biological and chemical pollutants in the indoor environment and limited data on the exposure-response relationship in humans. In essence, it is difficult to say who will be affected by mold spores and at what concentrations it would take to affect different people.

Due to the lack of set government standards, the environmental consulting industry follows general principles when evaluating mold test results. On a basic level when evaluating mold air sampling data, the mold levels should be higher outside than inside. The idea behind this approach is that there are always more molds outside in the soil, mulch, plants, decomposition of organic matter, etc. outside. Aside from an indoor and outdoor comparative evaluation, you evaluate the test results for specific types of mold. This evaluation includes looking for common outdoor molds as well as molds that are more commonly found on moist building materials. Evaluation of these molds goes a step deeper by looking for so-called opportunistic molds (marker fungi), which are frequently found on long-term water damaged building materials. The presence of these molds can point to a long-term moisture issue. These opportunistic fungi include Aspergillus and Penicillium species, Acremonium spp., Sporobolomyces spp., Stachybotrys, chartarum, Memnoniella echinata, Tritirachium oryzae, Ulocladium botrytis, U. chartarum, Cladosporium spp., and Chaetomium spp. These are molds that are not typically recovered in the outside air, so when they are found outside, they are in generally low levels. Conversely, when they are found indoors these molds typically point to an indoor water issue. The higher the indoor concentration of these fungi the more likely a long-term water issue is present.

In summary mold testing and the interpretation of the analytical results involves the evaluation of individual types of mold you find and determining why they are present.

Finding the type of mold, while interesting it does not explain why it is present. Therefore, every mold survey and mold inspection should not just confirm the presence of mold but also why the mold present is, and what created the environment for the mold to grow. The backend of the mold testing and mold sampling project includes an inspection for the physical presence of mold as well as for water damage.

More common mold questions and answers can be found at: /Mold-Frequently-Asked-Questions

New Jersey allows sellers of real estate properties to complete a Property Condition Disclosure Statement.  The property disclosure statement relative to mold references he following. 

NJ Seller’s Property Condition Disclosure Statement
(N.J.S.A. 56:8-19.1) A. 2685 

◦Yes    No         
[ ]      [ ]               9)        Are you aware of any water leakage, accumulation or 
                                       dampness within the basement or crawl spaces or any 
                                       other areas within any of the structures on the property? 

◦[ ]      [ ]               9a)      Are you aware of the presence of any mold or similar 
                                         natural substance within the basement or crawl spaces 
                                         or any other areas within any of the structures on the 
                                          property? 

As revised, N.J.S.A. 56:8-19.1 newly requires that if a filled-in property condition disclosure statement indicates the seller’s awareness of water leakage, accumulation or dampness, the presence of mold or other similar natural substance, or repairs or other attempts to control any water or dampness problem on the real property, the involved real estate broker, broker-salesperson, or salesperson is required to provide the buyer with a physical copy of the Department of Health’s "Mold Guidelines for New Jersey Residents" pamphlet. 

Mold Disclosure & Consumer Fraud

New Jersey consumer fraud law bans the "concealment, suppression, or omission of any material fact with intent that others rely upon such concealment, suppression or omission, in connection with the sale or advertisement of any … real estate." N.J.S.A. 56:8-2. 

The administrative rules of the Real Estate Commission provide that real estate licensees must disclose all information “material to the physical condition of any property which they know or which a reasonable effort to ascertain such information would have revealed to their client or principal and when appropriate to any other party to a transaction.” N.J.A.C. 11:5-6.4.  The concern raised by this requirement is that a real estate broker or agent might be called on to answer to a defrauded buyer for passing along bad information originating with the seller. 

1. Mold disclosure in a typical real estate transaction
2. Seller answers no regarding water or mold
3. Home goes under contract
4. Buyer does due diligence including a mold inspection.
5. Mold is found and a repair request presented to the seller
6. Maybe because of mold, maybe another issue but the transaction falls apart and the property is an active listing.

The seller now has to disclose the mold even if it was not disclosed previously. If it is disclosed, the Realtor would need to provide the buyer with the mold guidelines.

Mold growth is due to a water issue, mold will grow back if the water issue is not fixed. After disclosure of mold growth by seller, ask how the water issue was fixed and for some paperwork. Regarding the mold remediation, ask the seller for paperwork from the mold remediation company. The company should provide information on the remediation was performed and warranties on the products used during remediation.

Disclosure of mold by the Seller should not make your run from the property, if you have the proper paperwork backing up that it was remediated and the water issue was fixed, it shouldn't be an issue in the future.

Mold is the new four-letter word of real estate transactions. If either mold is visually found or testing is done (airborne mold spores and/or surface sampling), the transaction has a high percentage that it may not happen. There are many stories of real estate transactions with mold growth, but this one is very interesting.

The story goes that a buyer was interested in a home and during the home inspection, the home inspector took an air sample in the basement and the outside (exterior) for comparison.  There was no photo or knowledge of where the air sample was acquired from, for example the photo below documents where the air sampling was acquired (ex. kitchen).

Back to the story - The buyers wanted the entire basement remediated down to the studs.  The seller contacted Curren Environmental and  we provided sampling as well.  Our sampling showed mold was present in the basement bedroom. 

What does this lab data mean?

 The Stachybotrys as shown above in the sample results prior to remediation , should not have a raw count above one, and it was at 43.  Penicillium/Aspergillus was also very high, with the spr/m3 at 23,467 where it is recommended that should not be above 1000.  The second set of numbers are after remediation where the airborne mold spores dropped dramatically and were within industry standards.  Note - no home will be mold free. 

As part of the story, you need to know that this property was vacant for over 2 years. The heat and air were on as part of maintenance but not properly dehumidified. Mold growth occurs where there is moisture and organic materials. In this case, there was visual signs of mold growth on some furniture in the basement bedroom, but not in the basement living space and  small visual signs on the sheetrock wall in the basement bedroom.  There was no need to remediation and remove the entire basement back to the studs. 

What happened next?

When the humidity is high and the property is not well ventilated, mold growth will occur. These spores can become airborne and move throughout the home. This home had a lot of carpet which holds mold spores. Curren Environmental provided Mold Remediation at this property.

• Carpet was removed and tack strips were removed.
• All organic furniture that could not be wiped down was disposed.
• Removed mold impacted sheetrock, 18 inches past mold growth in basement bedroom. 
• HEPA vacuum walls and floors in the entire basement
• A broad spectrum, FDA approved, fungicide was applied to the walls and the flooring in the rooms.
• Air scrubbers were on during remediation and left at the property for at least 72 hours.

As the story goes, post air testing showed elevated spore levels dropped dramatically at the property. Please see below. For this story, only the sheetrock area that had mold growth was removed and the carpet, no other sheetrock was removed.  

The ending, a happy buyer, a happy seller and clean home. Not every property that has elevated mold spores needs to have everything torn down and removed. A mold remediation professional will look at the data, photos provided and any other detailed information prior to handing over a cost. It is very important to understand that mold is everywhere and there are no “Mold Free” properties.

It is not uncommon for mold to be found at a residence. Mold will grow silently over years in areas of your home that you may not even go in. 

During the home inspection or a mold inspection, mold  will show up during a real estate transaction. The rub with mold is that someone may see staining and call it mold or during a  home inspection, the inspector may test a surface for mold and confirm mold and then you are left with the knowledge that mold is present. What you won't know is why it grew, how to prevent it in the future and to what extent the mold is present.

The mold dilemma is there are only 11 states that have mold regulations so the industry lacks real mold professionals. If you are in NJ, PA or DE there is no mold licensing so in theory you can't find a mold professional or you can't find a state licensed professional.

The lack of mold regulations create no barrier of entry for someone wanting  to do mold work.  If you don't need a license  that saves you a lot of time and brain power.

Companies try and drum up work by offering "Free Mold inspections".   Are mold inspections truly free?    The time to give professional advice is not free,  as there has to be a cost involved to evaluate a property and provide professional advice. Free mold inspections, should read, "You are going to pay me to remediate mold if you need it or not". In the photo below, an inspector said that was mold and recommended remediation. 

Professional mold inspections can average around $500, plus or minus depending on size of property and if surface or airborne sampling is performed.  (It was not mold)

Let's be clear we have given thousands of 2nd opinions over the years and there is always three common threads we find with mold advice.

1. Many owners of properties that are told they need mold remediation, do not actually need mold remediation.  Or the remediation they need is not the ENTIRE basement or attic.
2. Mold often grows back when the mold was inadequately addressed. Read, consultant never stopped the actual cause of the mold. (Leak, moisture intrusion, humidity, etc).  In short there was never a professional evaluation for mold.
3. The mold testing person doesn't understand the results of the mold testing, the cause of the mold growth or the actual extent.  Case in point inspector sampled a crawl space and a basement that were connected. We were asked to provide a cost to remediate the crawlspace, when in fact the basement had the bigger mold issue and people used the basement to exercise, so the mold exposure was greatest in the basement, but that is not what the consultant recommended.    The problem with non-mold professionals is they like to take a samples because they will get a really long, slick looking report of lab data, which is all pretty boilerplate, but it looks nice.  Because the lab gives such a nice package the actual mold consultants feel they do not have to provide an opinion in writing, it happens all the time.    So they find mold but they can't say it doesn't have to be remediated, why it would need remediation, what would be the difference or really most important what is the cause, causes or even likely causes for the mold.  

Regarding the "report".  A mold inspection report isn't the lab data from the lab, it should be a written report detailing the inspection, what was found, what wasn't found, and most importantly is why was there mold in the first place.  The report should also go over, in detail, what the lab data means, along with photos.

The bottom line is many mold companies work in their best interest not that of the owner or client.  This is particularly true if you are being offered free advice.  Conversely Home Inspections are not mold inspections, so while an inspector may say mold was noted in the basement in attic, it does not define the extent or the cause.  Both of which you need to properly remediate the mold.

Expert Advice for close tp 30 years

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If we didn’t have mold, the leaves, mulch and grass clipping would never decompose, so mold is an essential part of our ecosystem.   Since minuet concentrations of mold spores can be expected to be found almost everywhere, indoors and outdoors, removing all mold from a home or business is just not impossible.  Since mold is only regulated in 11 states, you will see many businesses advertise “mold removal” and may even guarantee to remove all mold, which is really just not possible.

Visible mold is a sure sign that there is a mold problem. When we say mold is everywhere, it’s not visible to the naked eye. Your ultimate objective of addressing mold is fixing the source that fueled the mold growth and  then removing (remediating) the mold. In truth, you are going to aim to getting mold levels back to normal, natural levels (background, nothing visible, no odors).

Ever buy anything from Amazon?   Probably, they grew from an online book seller in the 1990's to a superstore, movie studio and video channel to name a few things.   An underlining mantra at Amazon is when a problem is found, they will "walk backwards" to find the cause so it can be fixed and the problem will not reoccur.   Mold remediation requires you to "walk backwards as well to diagnosis the cause and prevent it from reoccurring.

Clearly you want to remediate the mold in the photos, but you also want to fix the cause.

Understanding what caused the mold is the key to the remediation of mold. Case in point, the photo below is an excellent example of selective mold growth.  Look at the ceiling, some beams have a light brown wood color (no mold growth) and some are a greyish color (mold growth).  Mold Remediation is needed for sure but you have to also fix the cause.  I am not going to explain the cause, but we see it a lot, it always gets addressed during remediation.

New Jersey, Pennsylvania and Delaware do not regulate mold businesses, so hiring a competent ethical company that understands the science behind mold and mold growth is harder than it should be.  Curren Environmental is a full service environmental company and has been for over 20 years experience with mold.  Let’s explain what you can expect to address your mold problem either in your home or business. Even though every project has some unique attributes there is a foundation that you follow to successfully address the mold.

• Step 1: Mold inspection with emphasis on the cause of mold. You have to find the cause so it can be fixed and the mold will not return.
• Step 2: Develop remedial plan and make repairs to cause of mold. You need a plan to ensure you address the mold issue thoroughly. Most likely the person inspecting the mold will not be remediating so you need a clear set of steps (instructions) for the mold remediation crew.
• Step 3: Mold Containment of work area from non work area. As bad as any area with mold is, mold spores will get airborne when demolition or movement of mold impacted items from the space. You need to be able to maintain clean areas outside the mold work area.
• Step 4: Air Filtration of area to contain spores. We use industrial grade air filtration to clean the air during remediation to prevent cross contamination.
• Step 5: Clean and save items as possible, wrap fixtures in space if present.  Trust us the mold on the treadmill in your basement can be cleaned and saved.  That box of old magazines, probable not. 
• Step 6: Physical remediation, hep vacuum to clean mold growth, fungicide application and apply fungistatic coating of remaining porous surfaces this prevents future growth and comes with a 10 year warranty. This is the meat and potatoes of the project.
• Step 7: Final walk through, what should you expect? You should expect any space that had mold remediation to be cleaner than before remediation.  Expect that organic wood surfaces are now treated with a fungistatic coating. You may have also found other sources/drivers of the mold during the remediation and this would need to be expressed to the client. (Finding hidden water leaks or termite damage is not out of the ordinary.)

You have mold because you have moisture and possible from more than one source. We have completed thousands of mold inspections and mold remediation.  Our crew is trained to find problems and provide solutions.

Signs of Mold? Call Today 888-301-1050

Expert mold advice, that is what you would want if you had a mold question - right?  Everybody wants the best available advice, but is it possible to get expert mold advice?   Finding a true mold professional is like finding a needle in a haystack.    It’s hard and rarely accomplished.  You can blame lack of government regulations as a source of the scarcity of mold professionals.  You see New Jersey, Pennsylvania and Delaware have zero mold regulations, so every "Chuck in a Truck" can say they know mold.

On a fairly consistent basis (almost daily to be fair) we get calls from people all over the country  that have questions about mold, or need us to interpret mold testing that a professional they hired cannot explain.   Fact, if you hire a professional, they should be able to provide professional advice in writing and be able to understand test results.   If your expert has a Gmail account, works out of their home or says they are licensed, I would say these are three common threads we find from people who have complaints with a mold company. 

No mold regulations, means no licensing, no required competency or required training and testing, so what is stopping someone from changing careers,  say from selling cell phones to doing mold consulting.   True story I met someone with just that background at an event down the shore, suffice to say what they knew about mold was very little.  Or should I say, what they knew about mold was mostly inaccurate. Did you know the salt air and the pressure treated wood that are prevalent in coastal areas inhibits mold growth?  Well, either did he and he told me not to tell people that its bad for business, he said fear of mold sells.   Sorry, I can't make this stuff up.   

As an environmental consultant that consults on mold, you need to inform clients and provide recommendations on risk and courses of action.   You do not sell fear.   Mold is harmful to human health, that is established, I have had people not be able to inhabit a home, or office where mold growth was present.  I also have people who live in an environment where mold is present and levels in the air are in concentrations where I know health issues were triggered in other people, although the current occupants had no apparent ill health effects from the mold.   This is actually not uncommon as we all have our sensitivities to gluten, lactose and mold, so what might be harmful to one person may not be to another.  That is not to say mold is a selling feature of a property, it certainly is not but mold has to be looked at objectively.   

How to pick a mold company?

1. Look for a company that at least 10 years of experience, 20 is better.
2. Google their address, make sure they work out of an office, not a home.
3. Check the ago of their web site address:  https://www.iplocation.net/domain-age     The longer a domain has been in operation, means the longer the company has been operating.   
4. Ensure everything provided to you is in writing, meaning scope of work, what they will do, how they will test and what the test results will mean.  Look we all know an A grade is better than a C, and an F is the worst, well translate that into mold test results. 

At Curren Environmental we have built a base of knowledge on mold consulting and mold remediation over a 20 year period.   We meet all criteria listed above.

The recession of 2008 can still be felt today in the form of foreclosed properties that have been flipped.    These flipped homes look nothing like the home when it was bank owned.   Flipped homes certainly hold appeal for homeowners who want move in conditions homes.  The photo below shows a house that went through renovations.

This is a photo of the same home same area pre renovation.   Note the mold on the wood furniture on the left hand side of the photo.

Bank owned houses due to no occupancy, have wildly ranging temperatures and humidity fluctuations.  In short, the house gets hot and humid in warmer months, which allows mold to grow.  We have done homes where we come across mold on walls, trim, furniture, attics, basements and crawl spaces due to the house not being heated and cooled.  These homes also may be like this for years.  This certainly makes for homes that are in desperate need of rehabilitation, the question you have to ask is was the mold addressed?

Almost certainly mold in attics and crawl spaces are typically not addressed as these are not areas where the flipper will get bang for their buck or even look for repairs.

Basements typically get partially redone because it creates a living space that was not present before.  The problem is mold that has grown during the foreclosure process gets covered over by clean sheetrock, concealing the mold.  We have seen cracks in foundation walls covered by fresh sheetrock.

Basements in bank owned homes typically will have some levels of mold growth.  Again, when these homes are not occupied, there is a high possibility of mold growth.  

Why Mold Test a Flipped Home?

Many house flippers tend to look over the mold growth in basements, one because they are not aware it is mold growth and two, they are unaware of any water issues.  It is Curren's recommendation to always do  Mold Testing in basements of those homes that are being flipped, especially if they were once not occupied and a Foreclosure, sheriff sale, tax sale or bank sale property. There are times when basements are finished or re-finished and the mold growth is covered up, but not specifically remediated.  Meaning, mold will continue to grow and fester in these areas and will not just disappear.  

Attics are yet another area that are not in the realm of a house flipper.  When an house is not occupied for a period of time, humidity and moisture builds up, especially in an area that has no air flow.  Non-occupied homes do  not always have electricity and whole house attic fans, attic fans and humidistat attic fans will not turn on when necessary.  These situations lead to mold growth in attics.

Curren Environmental suggests Mold Inspections and testing in homes that have not been occupied for a period of time.  Mold growth will occur within 72 hours in the right environment.  Its not to say that home flippers are hiding the mold, they may just be missing that what they see is mold growth.  They are not mold experts.

Questions?

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