Hot Environmental Topics

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

888-301-1050

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?

or email at info@currenenvironmental.com

You can smell mold?

Spending more time at home than usual? Many people are in the safety of their homes and our office is getting called regarding musty smells, that people think relates to mold in their home. These calls coincide with rain events and we find a simple equation. People have mold in their homes they didn’t know existed. Many people find mold during a real estate transaction, since that is when a home under goes scrutiny, meaning multiple inspections occur and the wear and tear items that we often ignore are brought to light. I mean do you ever go into your attic or basement and look for mold?

The musty smell you have is most likely mold and it is active mold growth because when mold is consuming organic matter it off gases, hence the smell. Growth can correlate to rain events (not necessarily flooding), temperature changes, and humidity levels. In short moisture above 55% humidity as most molds in the northeastern United states will grow above that range.  Add in the fact that the northeast has an older housing stock and you have a higher probability of mold. Why older homes have mold, simple put the older a home the greater the time frame for mold to grow somewhere in the home. This gives mold the toe hold it needs as mold won’t die when it is dry it just goes dormant. This mold will then grow sporadically (no spore joke intended) over time until the owner complains of a smell, has a health concern or buyer’s inspector finds mold

Our calls lately have been from people who are working from home or simple spending more time at home and they either smell musty odors or are having health concerns. These people never had a mold inspection performed so the idea of a mold inspection makes sense.  Our mold inspections typically find mold, which makes sense.  The key to finding mold is understanding why it is there and how the mold can be addressed (mold remediation) and future prevention.  A typical mold survey might find a half dozen reasons why it’s there (yes there is typically more than  one cause for mold growth. We provide the homeowner a DIY  list for everything they are doing wrong and a corrective action plan (mold remediation) outline and costs. All mold remediation has a 10 year warranty against future mold growth, best in the industry.

We also teach several classes on mold so you know you are getting expert advice.

All our inspector use N-95 masks and have at least five years experience with both mold inspections and remediation.  We inspect and remediate mold so we get to see mold from both sides which gives Curren a full perspective.  Different building materials from pour concrete walls, to cider block walls to wood studs to plaster wall all affect how mold can and will grow.To schedule an inspection call 856-858-9509.

What is mold and is mold dangerous?   Two common questions regarding mold.  First let’s start with "What is mold?". Mold is ubiquitous in our environment.  There are few places on earth, where molds are not present.  That said, mold (which is also called fungi) is a broad-spectrum term to describe fungi, mushrooms, rusts, mildew, and yeast. As humans, we simply complex things by using the term “mold”. Any mold is a eukaryotic organism, meaning one that has a defined nucleus.  Molds lack flagella and reproduce by means of spores. Spores are released from the mature mold body and spread by air currents on people, animals, and/or materials that travel from place to place. These spores can remain viable for extended periods of time, which, in short, is as long as it takes for a suitable environment to occur which allows the mold to form new colonies.

What is Black Mold? What is toxic Mold.

The next two most common questions. First, black mold is not a mold it is a color, the term was made up by the media. There is no mold that has the scientific name as black mold. The same goes for toxic mold, we think the name toxic mold came from the mold industry to scare people. Again no mold has the scientific name toxic mold.

Molds are fungi that grow in the form of multicellular filaments called hyphae that spread to form a network or colony called mycelium. When you see visible mold (spotting, staining, discoloration) you are observing a colony of mold. Most all fungi require oxygen to survive and all fungi need an organic food source.   Unlike humans, molds do not ingest their food but rather absorb nutrients by attacking dead organic matter or parasitizing living organisms. In an outdoor environment you can think of molds as nature’s composers as many molds live in the soil and are active in the decomposition of organic matter.

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Molds are not strictly confined to the outside, although that is their primary habitat.  Molds can grow indoors in a built environment (built being man made structure).  Molds can grow anywhere if the following four primary conditions are satisfied:

1. Mold spores must first be present in the area.
2. Food source such as wood, drywall, the paper part of insulation, skin cell fragments, cardboard, carpet, paper, etc.
3. Appropriate temperature – this is a variable as molds can grow dormant when the temperature is out of range for required growth and then when the temperature is within range mold will grow.  (Think grass growing in summer and growing dormant in winter)
4. Water or Moisture – if mold was a building, water/moisture would be the foundation, without it, you will not have molds growing and it is the one of the four conditions that can be controlled. Bottom line, if you have mold you have a moisture issue. 
5. Moisture sources in a built environment are most commonly brought on from water and/or sewer leaks, moisture intrusion (rain) through walls and foundations.  In practice, moisture issues that fuel mold growth are associated with humidity or as condensation in HVAC systems. In terms of relative humidity, causing mold growth, is more of an intermittent issue that can occur at certain times of the year.   Damp, wet times of the year being more likely as opposed to winter when temperature may remove humidity.
   
   Both national and international health agencies agree that molds can cause health issues to varying degrees.   To the extent anyone is affected by molds relate to the types of molds, concentration, exposure duration and genetic factors of the individual.   There is no perfect fit that would say a certain person would be affected and this person would not.

Mold affects humans through the inhalation of spores, which is how mold reproduces, so you should realize that when you see mold, spores are present and you could be at risk.  Molds also produce mycotoxins which are chemicals that are created during certain parts of the mold life cycle.  Mycotoxins having the word “toxic” in the name underlines them as a concern.  Mycotoxins can evoke a toxic response, for example, allergic reactions, respiratory irritation, the exacerbation of asthma symptoms as well as other respiratory reactions to an irritant.  Mycotoxins have this affect because they have very low volatility, meaning they have relatively low concentrations in the air, so contact or ingestion rather than inhalation is often the main route of exposure for these chemicals.
Since molds digest matter, they will naturally off gas.  The off gassing of mold often referred to as the musty odor is scientifically called MVOCs or microbial volatile organic compounds.  Their olfactory presence signifies actively growing mold. Fortunately for humans MVOC's have a very low odor threshold, thus, making them easily detectable by smell. Exposure to fungal MVOC's has been blamed for headaches, nasal irritation, dizziness, fatigue, and nausea.   So, while someone may refer to an odor as musty it signifies the presence of mold and compounds that are airborne that can have detrimental health effects in humans.
Chronic exposure to large airborne concentrations of fungal spores can induce allergy or hypersensitivity in certain individuals. In some cases, chronic exposure to fungal spores can result in a flu-like debilitating disease known as hypersensitivity pneumonitis.

Mold is confusing and the many unlicensed firms that perform mold work dont help to demystify mold.  At Curren will off a free initial consultation.  Call our office Monday to Friday 8:00am to 5:00pm EST and speak to one of our professionals.  888-301-1050.

                                                   Why is mold so prevalent?

Mold is a four letter word and strikes an emotional cord in people when spoken and encountered. Health concerns are a major factor on people’s perspective of mold. Mold is ubiquitous in our environment and to have a mold free environment is practically impossible. That said, if you see growth (often described as discoloration), you have mold that is or was actively growing and spreading. In short there is an environment that is allowing the mold to grow, which is a preventable situation. Here are some of the environmental and situational causes of mold growth.

Aging Housing Stock. (Deferred Maintenance)

As the homes in the United States get older, the repair and maintenance needs for these homes are on the rise. Older homes are in need of much more care. Gutters clog, caulk dries out, foundations settle and cracks appear, soil erodes away from foundations, dehumidifiers break and don’t get replaced, sump pumps die, exhaust fans break. Homes that have been missing general upkeep have been labeled deferred maintenance abodes.

When gutters are filled with debris water cannot flow from the roof and away from the dwelling perimeter. Water can pour over lengths of horizontal gutters placing water close to the structures foundations and allowing moisture to enter subterranean spaces.

Caulk around windows dry out and holes appear. Rain events can allow water to enter through worn caulk and enter the building structure.

Over time, foundations can settle and cracks can form. Hydrostatic pressure is strong (ever get pushed down by a wave at the beach?). Water from rain events or melting snow can enter these cracks and crevices; again allowing moisture to enter the space.

All perimeter foundations should have what’s called in industry parlance as “positive drainage”. Meaning the exterior grade around a foundation should slope away from the foundation, thus diverting water from the foundation.

Dehumidifiers can be called the devil’s machine, how many times are you going to trek down the basement and empty the dehumidifier? Until you simple stop doing it (leaving a full tank) and just simple turning off the unit. Dehumidifiers don’t have to break, they just have to stop capturing moisture and discharging it. Eighty percent (80%) of residential single family units that have mold below grade (basements and crawlspaces) had a dehumidifier present, but it was not operating.

Set dehumidifiers to 55 and plug a hose into the unit and drain it directly to a sump or sink. You do not need the unit set to 60 or 65 like the one in the photo

Sump pumps are the workhorse of a high water table and wet basements. They are your last line of defense to keeping storm events out of your home. These electric pumps will eventually clog and burn out and some simply die from years of unappreciated faithful service.

Sump sumps? Cover the crock, water evaporates and adds to over all moisture.

.Exhaust fans are loud and who wants to exhaust anything anyway from a bathroom? These fans just make you cold and in an attic, it just makes a lot of noise. But these locations when fans operate, help control environmental conditions that can hinder mold growth.

All these seemingly minute items can allow a conducive environment for mold to grow. Truth be told most mold impacted areas did not get moldy over night, most have had a slow steady mold buildup for years and the older the home the more time mold has to grow. The environmental disaster event, where a dwelling is flooded, roof leaks, plumbing line breaks, do happen but they are the minority on average. Attics, crawl spaces, basements by nature of their unconditioned environment are hot beds for mold growth.

Aging Population.

As long time homeowners get older, they age out of skill sets required for homeowner maintenance. As general mobility decrease so does the ability to climb a ladder or walk downstairs. Some people just throw in the towel knowing that the fight they had with mother nature was lost and water will get in and it eventually dries out so why bother?

First Time Homeowners.

Much has been said about younger generations, and not always in the most flattering light. There are no courses you get about home maintenance when you sign a mortgage, more people buy books about rearing kids than about how to take care of a home. Television is no help, the home improvement shows don’t show you how-to-do mundane tasks, they show you backyard retreats you can build, bathroom and kitchen makeovers. All sexy cool stuff, that doesn’t help with home maintenance when it comes to mold.

New Home Construction.

You would think a new home would be a problem free home, well - not for mold. Today’s tighter building envelopes trap moisture indoors allowing mold to grow. New homes tend to have wetter, less dense wood than older homes, primary because the wood comes from new growth forests making the wood young or immature. In short, the wood hasn’t had decades to dry out. In addition, this newer wood often is not kiln dried, which means it did go through a process to fully remove all the moisture, why, because it’s more expensive.

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 mold is found by the analysis 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 captures microscopic airborne particle (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 that 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, occurrence of different types of biological and chemical pollutants in 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 principals 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, ect. 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, what created the environment for the mold to grow. The backend of mold testing and mold sampling project include an inspection for the physical presence of mold as well as for water damage.

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