Mold in Your Maryland, Virginia, and D.C. Home Attic

In order to prevent mold from growing, well ventilated attic spaces are critical. Without proper venting (air movement and exchange) many bad things can occur, especially involving mold growth on wooden structures such as roof sheathing or truss members. The following are some of the reasons why mold may begin to grow in an attic:

  • Too much humidity from the HVAC system humidifier
  • Insufficient soffit venting (from the eaves)
  • No ridge venting (at the roof peak)
  • Inadequate gable venting (side vents)
  • Not enough insulation (poor thermal envelop)
  • Clothes dryer venting into the attic (source for high humidity)
  • No bathroom vents, so humidity builds in attic (source for high humidity)
  • Bathroom vents into attic (not above the roof line) (source for high humidity)

These are important items to look for in a mold/moisture inspection involving an attic. We look for these potential problems especially as a means to prevent mold prone environments and educate you on the best approach to prevention as well.

Contact Information
RTS Environmental Services, Inc.
Tel: 1-800-722-5589
301-607-6276 Maryland Line
Fax: 301-831-6235

What Are Bioaerosols?

A healthy indoor environment is important to you and your family. This includes keeping the air free of biological contaminants, which can cause health problems. Scientists call these airborne contaminants bioaerosols.

Bioaerosols are extremely small living organisms or fragments of living things suspended in the air. Dust mites, molds, fungi, spores, pollen, bacteria, viruses, amoebas, fragments of plant materials, and human and pet dander (skin which has been shed) are some examples. They cannot be seen without a magnifying glass or microscope.

Can bioaerosols cause health problems?
Yes. They can cause severe health problems. Some, like viruses and bacteria, cause infections (like a cold or pneumonia). Others cause allergies. Both allergic responses and infections may be serious or even fatal.

An allergic reaction occurs when a substance provokes formation of antibodies in a susceptible person. We call substances which will cause an allergic reaction in some people antigens or allergens. Bioaerosols may cause allergic reactions on the skin or in the respiratory tract. Rashes, hay fever, asthma (tightness in the chest, difficulty in breathing), and runny noses are common allergic reactions.

A few people develop a severe allergic reaction in the lung, which can destroy lung tissue. This is called hypersensitivity pneumonitis. It is not an infection, but repeated episodes can lead to infections of the lung, such as bacterial pneumonia.

Hypersensitivity pneumonitis can be triggered by exposure to very small amounts of the allergen, once a person is sensitive to it. Symptoms can range from tightness in the chest, cough, and difficulty in breathing, to low-grade fever, muscle aches, and headaches.

What are sources of bioaerosols in the home?
Molds, mildews, bacteria, and dust mites like the same conditions that we do–warmth and moderate to high humidity. They need little more than a constant moisture supply for survival. You may find bacteria, molds, and mildews in air conditioning equipment, humidifier reservoirs, dehumidifier drip pans, shower heads, toilets, and ice machines. Water damaged carpets, ceiling panels, walls, and paneling are prime sites for new growth if they are allowed to stay damp. When molds, mildew, dust mites, and bacteria are disrupted or release their spores into the air, this results in bioaerosol formation.

Molds and mildews develop from spores, which are in the air all around you. As soon as spores settle in an area with the right conditions for growth, they establish colonies, which are often visible to the naked eye. These colonies are a source of more spores, can cause unsightly stains, and may release low levels of toxic chemicals called mycotoxins into the air.

Humidifiers are such a common source of bioaeorsols that cause health problems that doctors now use the term humidifier fever. Protozoa, amoebas, and strains of bacteria have been found in humidifiers, and these are readily released into the air with the moisture produced by humidifiers. These have been linked to allergic responses in sensitive people.

Dust mites and their waste products are the most common allergens in indoor air. Dust mites eat human and pet skin (dander) as it is shed. It has been estimated that we shed about seven million cells per minute! Dust mites live in rugs and carpets, sheets, mattresses and pillows, and upholstered furniture. Ten to 15 percent of people are allergic to dust mites. Of the people who have other allergies, 40 percent are also allergic to dust mites.

What measures can be taken to control bioaerosols in the home?
First, lower the relative humidity in your home, basement or crawl space, and attic. Relative humidity is the amount of moisture in the air at a given temperature. You may want to see Identifying and Correcting Moisture Problems in Homes. The humidity fluctuates in your home, depending on:

How warm or cool the air is indoors.
How many moisture-producing activities (drying clothes indoors, showers) are taking place.
Whether there is a constant source of moisture (leaks, damp foundations and attics).
How much moisture is being vented to the outside.
If you can keep relative humidity below 50 percent, you can reduce problems with dust mites, mold, and mildew. A hygrometer can be used to measure indoor humidity levels. You can buy a hygrometer from some nursery or garden stores, and from hardware stores.

There is little medical research supporting the use of a humidifier, so try to avoid using one. If your home is extremely dry and you must use a humidifier, a steam vaporizer or warm mist humidifier causes fewer problems. Do not humidify indoor air to a relative humidity level higher than 50 percent.

Dust Mites
It is not known how well any single measure controls dust mite populations. However, it is known that effective mite control requires that relative humidity be maintained below 50 percent. In addition, since you spend about a third of each day in your bedroom, concentrate your efforts there.

  • Wash sheets, pillowcases, and mattress covers frequently in hot soapy water. If someone in your family is allergic to dust mites, buy special vinyl covers for the pillow and mattress.
  • Ordinary vacuuming does not remove or reduce mite populations. Mites are so tiny that they pass through the vacuum cleaner bag. High-efficiency filters for vacuum cleaners may be used in place of conventional filters.
  • Remove stuffed animals and objects that collect dust.
  • If carpeting is used, short-pile is best.
    Some new products may help reduce dust mite populations. Ask your doctor about control solutions for upholstered furniture and bedding.

If you are concerned about air quality in your home, don’t hesitate to call RTS Environmental Services. We provide state of the art Mold & Moisture Inspections, Mold Identification, Mold Remediation, Air Quality Testing, Asbestos Inspection & Removal services in the Greater Washington D.C. Metropolitan area, Maryland, and Northern Virginia.

Consumers: Ask About Your Contractor’s Mold Certification

These days, lots of contractors say that they’re experts. But are they really? Before you hire someone to inspect, test, or remediate mold from your home or business, ask about their mold certification.

Some contractors obtain Mold Certificates from organizations that aren’t very credible. The most credible organizations for certifying mold professionals are the American Indoor Air Quality Council and the American Board of Industrial Hygiene.

The American IAQ Council has several mold certifications related to both mold inspection and mold remediation. The following list describes their mold certifications and the associated experience requirements which are dependent on university level of education:

  • Certified Microbial Investigator (CMI), requires minimum 1-2 years of field experience
  • Certified Microbial Consultant (CMC), requires minimum 4-8 years of field experience
  • Mold Remediation
  • Certified Microbial Remediator (CMR), requires minimum 1-2 years of field experience
  • Certified Microbial Remediation Supervisor (CMRS), requires minimum of 1-5 years of field experience
  • The other recognized certifying organization, the American Board of Industrial Hygiene (ABIH) has a more general certification, Certified Industrial Hygienist (CIH).

You can view our certifications here. RTS has provided thousands of inspections including Radon gas, Lead Paint, Asbestos, and Mold / Indoor Air Quality issues. With more than 20 years of experience in the environmental, mold and asbestos industry, RTS Environmental can protect your family and your home from the dangers of mold.

Contact Information
RTS Environmental Services, Inc.
Tel: 1-800-722-5589
301-607-6276 Maryland Line
Fax: 301-831-6235

Common Sources of Volatile Organic Compounds (VOCs) in the Home

Volatile organic compounds (VOCs) are a group of chemicals that can vaporize easily and introduce gas pollutants into your home. Often released into the air from synthetic and composite materials, VOCs are usually emitted during home construction, finishing, or cleaning. VOCs can be released from a wide variety of products often found in the home, including cleaning supplies, paints and paint strippers, pesticides, building materials, carpets, caulk, varnishes, and even air fresheners.

Concentrations of VOCs are often up to 10 times higher indoors than they are outdoors, meaning that homeowners should take special care in decreasing the amount of VOCs emitted in the indoor environment. To decrease the amount of VOCs in your home, follow these steps:

  • Increase ventilation when using products that emit VOCs, particularly during and after painting.
  • Use household products, such as cleaning solutions, according to label directions.
  • Avoid storing partially-used or open containers of products containing VOCs. Only buy quantities that you will use immediately.
  • Purchase solid wood items with low-emitting finishes and products and paints that contain low or no VOCs.
  • Try to perform renovations when your house is unoccupied.
  • Keep your home’s temperature and humidity as low as possible, while still being comfortable. Chemicals will release VOCs more readily in warmer, more humid conditions.

The risk of health effects resulting from VOC presence in your home depends on how much is in the air and how often a person breathes it in. Short-term, or acute, health effects after breathing in high levels of VOCs can include eye, nose, and throat irritation, headaches, nausea, dizziness, and worsening of asthma symptoms. It’s estimated that long-term, or chronic, health effects after breathing in high levels of VOCs for a long period of time can include cancer, as well as liver and kidney damage. Those with respiratory problems and asthma may be more susceptible to VOCs-related health effects.

If you have reason to believe your home may contain a high level of VOCs, contact RTS Environmental Services, Inc. RTS Environmental has provided thousands of mold, asbestos, and indoor air quality inspections throughout the Washington DC, Maryland, and Northern Virginia region.