The Indoor Mold Is An Early Warning Device

The mold (or mould, in the Queen’s English) has been the victim of a bad press. Mention the word and it conjures up an image of something rotting or in the process of decomposition. And yet, were it not for the mold that inspired the discovery of penicillin millions of lives would have been lost. If you love mushrooms and like your beer, you can thank the mold for that, too. The mold is a network of fungi but there are many different kinds: some good, some bad. One of the more undesirable types is the indoor mold. You usually find them in dank, dark sections like the attic or basement, or in the kitchen and bathroom. The mold is also likely to raise its unsightly presence in parts of the home that have been flooded or have poor ventilation.

The indoor mold can cause health problems, especially with those suffering from asthma. A greenish-black, slimy variety known as Stachybotrys chartarum has earned the name “toxic mold” and grows wet organic material rich in cellulose such as wood or paper (but not on concrete or tile). It can cause severe problems for humans as well as pets, and is one of the causes of “sick building syndrome”. This indoor mold can produce allergic reactions like watery eyes, headaches, frequent sneezing and coughing.

The upside is that an indoor mold can serve as an early warning device. It tells you that an area of the home is not properly ventilated, has excess moisture and that the air quality is inferior. You can then take steps to reduce moisture in the area and remove materials that cause mold growth.

The mold is everywhere and can survive under all sorts of conditions, even in places like the refrigerator. Some molds are resistant to anti-fungal soap or highly-acidic solvents. Therefore, when cleaning up a mold-infested area, you should always wear proper protection like a respirator mask, rubber gloves and the right clothing.

The key to cleaning up an area with indoor mold is to solve the moisture problem. Dry up the excess moisture and remove all the materials that have been infested by the mold. Get rid of items like carpets and wallpaper that cannot be cleaned and dried. First spray the area with water to keep down the dust and debris while you are removing the items. The materials should then be sealed in a double-bag and the bag wiped clean to prevent the mold from spreading to other areas.

If the area with indoor mold cannot be removed, it should be cleaned with soap or detergent. After that, it helps to disinfect the area with a diluted bleach solution. Do not sand or scrape the surfaces and avoid using a hammer to remove drywall that is mold-infested.

If the affected area is larger than 10 square feet, you may need to turn the job over to a professional mold remediator. You can find companies that specialize in restoring homes damaged by fire and water whose services include indoor mold remediation.

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Canadian Mould Remediation Guidelines

There are a number of mould remediation guidelines in Canada. These include:

Mould Remediation Guidelines for the Canadian Construction Industry

The mould remediation guidelines prepared by the Canadian Construction Association offers practical advice on mould-related issues (legal, insurance, and health considerations). It also offers helpful information on how to minimize mould growth, identify and measure it, and step-by-step instructions on remediation.

The guide is free to download from the CCA website http://www.cca-acc.com/documents/electronic/cca82/cca82.pdf and hardcopies can be purchased from your local construction associations.

EACO Mould Abatement Guidelines

Environmental Abatement Council of Ontario prepared this mould remediation guidelines to assist building owners, constructors, contractors, subcontractors and workers who have duties under the Occupational Health and Safety Act and its Regulations to safely perform work activities involving Mould (Microbial) Abatement and remediation. A free copy is available on their site at http://www.eacoontario.com/downloads.htm

OAA Mould Control Practice Guide

The Ontario Association of Architects (OAA) issued the Mould Control Practice Guide to assist and educate its members with respect to certain matters related to mould and mould in buildings. The guide is available at their website at http://www.oaa.on.ca/client/oaa/OAAHome.nsf/web/Mould+in+Buildings+-+OAA+Mould+Practice+Guide?OpenDocument

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Mold Removal: when to use a mold removal company

When to call a professional mold removal company

Mold removal is the process of removing  all moldy or contaminated material from a building. Generally material that can be cleaned are cleaned and dried. Although it’s tempting to remove any mold you see, it’s not always practical or safe to remove it yourself. Removing mold before you know whether it’s toxic can make your family feel ill. And sometimes there’s simply too much mold for you to remove safely yourself.

What mold removal guidelines say

You may clean small areas of mold (less than 1 square meter or 3 square feet) yourself. If you do choose to clean small areas of mold yourself, please follow mold guidelines for your safety and that of your family.

Mold growth covering an area less than 10 square feet is categorised as level 1 mold growth. Level 1 mold growth can be one single area of mold or it can include several patches of mold which together would be less than 10 square feet. Remember! Cleaning the mold without fixing the moisture problem, doesn’t solve the mold problem.

If visible mold growth in your house covers more than 10 square feet or if you are not sure how to clean the mold safely, it is recommended you seek professional advice. Cleaning large areas of mold growth releases high concentrations of mold spores into the air, which could make your family feel sick.

Therefore, extensive areas of mold growth should be cleaned by a professional. Heavy concentrations of mold spores can cause or worsen health problems.

Molds don’t have to be toxic to cause health problems. Even a common, usually harmless mold can be a health issue if there is a lot of it. However, always consult a professional if your house mold is a toxigenic mold, or if you even suspect a toxigenic mold.

How Do You Tell If A Mold is Toxigenic?

If you need to know whether your house mold is toxic or not, you may want to send a sample to our lab for testing. To send a sample, download the Order Form, complete it and send it together with your samples.

Remember! – please call a mold remediation professional when:

    • You the area covered by mold growth is greater than 10 square feet
    • You’re not sure of the extent of your mold problem
    • Mold comes back after repeated cleaning
    • The home is very damp
    • A family member suffers from allergies or asthma
    • You think the mold may be a toxic mold because a family member is suffering from unexplained symptoms that may be related to exposure to toxic mold

 

If you need a professional mold removal company, please visit this mold remediation professionals directory for a comprehensive list of mold remediation specialists listed by province. We also work closely with some mold removal companies and we may be able to direct you to the right people. Give us a call at 905-290-9101.

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Canadian Residential Indoor Air Quality Guideline For Moulds

Whenever mould testing is performed people want to know whether the levels of mould detected are harmful or not. While there is enough evidence to suggest exposure to indoor mould result in an increased prevalence of asthma-related symptoms such as chronic wheezing, irritation symptoms, and non-specific symptoms it has proved difficult to set exposure limits for mould. Health Canada has issued a residential indoor air quality guideline for moulds as quoted below:

“Health Canada considers that mould growth in residential buildings may pose a health hazard. Health risks depend on exposure and, for asthma symptoms, on allergic sensitization. However, the large number of mould species and strains growing in buildings and the large inter-individual variability in human response to mould exposure preclude the derivation of exposure limits. Therefore, Health Canada recommends:

  • to control humidity and diligently repair any water damage in residences to prevent mould growth; and
  • to clean thoroughly any visible or concealed mould growing in residential buildings.

These recommendations apply regardless of the mould species found to be growing in the building. “

Any visible mould should be removed safely. There are mould guidelines that outline safe procedures for mould removal. Most of these guidelines are available on the internet.

If you are a homeowner or an occupant of a house and you see visible mould growth, you may want to send samples to a laboratory for testing. The lab report would tell you the types of mould species growing in the house and whether they are known to be of health concern. But remember, regardless of the types of moulds present, the mould has to be cleaned.

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How To Control Mold

Mold is a living organism. For mold to thrive, it requires nutrients, water and suitable temperature. If we can deny mold any one of these requirements we can completely control it’s growth. It is practically difficult to manipulate the temperature or to eliminate the nutrients. However, we can control moisture or humidity in our houses. The key to mold control is to keep our houses dry all the time. Regularly vacuum cleaning of dusty surfaces such as the carpet also help to reduce the amount of settled spores which actually give rise to new mold growth when water becomes available.

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Mold On Books

Books are prone to dampness if the relative humidity is not maintained below 60%. Prolonged damp conditions results to mold growth on the paper and on the bindings. Mold growth on books leads to damage of books through staining and or breaking down of paper and other book components. Besides the damage, many molds isolated from books are a health hazard capable of causing serious respiratory diseases and allergies of various degrees. Molds commonly isolated from moldy books include species of Aspergillus, Penicillium, Cladosporium, Trichoderma, Chaetomium, Stachybotrys, Epicoccum and a number of others. Trichoderma, Chaetomium, and Stachybotrys are strong producers of the enzyme cellulase that breaks down the paper.

Procedure for cleaning moldy booksMold growth on a book

If the books are not extensively damaged (i.e, the paper is still intact), they can be saved. Below is a brief procedure that can be used to clean moldy books.

  • Workers must wear appropriate personal protective equipment when handling contaminated books. This includes wearing coverall or other protective coat over street clothing, a respirator (i.e. N95 or better) and vinyl examination gloves. Unprotected individuals risk aggravating or developing allergic sensitivities to the mold spores.
  • Cleaning must be conducted within a temporary containment unit away from air intakes, other building openings and public areas.
  • Moldy books must be HEPA vacuumed on the following areas: outside front and back covers, joints between the covers, spine, text block and inside back and front covers. A soft-bristled brush may be used to remove stubborn mold growth. (NB: Care must be taken not to damage the books).
  • Once cleaning of books is completed, book carts that were holding moldy books must be cleaned with disinfectant and paper towels. Refer to the material safety data sheets (MSDS) of the disinfectants before use.
  • Before re-shelving, the cleaned books must be given a quick wipe down with an appropriate disinfectant solution, the floors and shelf areas must be cleaned and disinfected and the shelves and flooring must be cleaned with disinfectant and paper towels.
  • After completing the cleaning, the exterior of the HEPA vacuum cleaner is wiped down with a disinfectant to kill any settled spores.
  • Workers must remove protective coveralls, eye protection, respirator, and gloves outside and wash hands with soap and hot water after completing the cleaning session.
  • A record of where the problem areas are, the cause of the problem, a list of the cleaned books, the time and day when the cleaning took place must be kept for future reference.
  • Implement a preventative cleaning program to address the continuing mold problem in the library.
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Black Mould In My House

Close to 200 species of moulds have been reported from indoor environments. However, only a small percentage of this is commonly found indoors. A significant number of these moulds may appear black or greyish and hence the common term “black mould”.

How do I know if the black mould in my house is “toxic mould”?

Since many moulds may appear black, it’s only through laboratory identification of the mould that one can tell whether the mould is known to be toxigenic (“toxic”) or not.

How do I clean up black mould in my house

The key to preventing black mould growth is to eliminate moisture. Once mould has grown in a building it has to be removed. Regardless of the type of mould, the procedures used to remove mould are the same. However, the amount of mould present, the type of mould and the sensitivity of the occupants determines the level of remediation required. For example, in a hospital environment the safety measures taken in mould removal are more stringent than say in an industrial environment.

For more information regarding black mould, please call 905-290-9101.

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Mold Removal Guidelines

Once mold has grown in a building, it has to be removed (also referred to as mold removal, mold remediation, or mold abatement). There are various mold removal guidelines:

  • Mould Guidelines for the Canadian Construction Industry (2004): by Canadian Construction Association.
  • Mould Abatement Guidelines (2004): by Environmental Abatement Council of Ontario (EACO).
  • Guidelines on Assessment and Remediation of Fungi in Indoor Environments (2008): by the New York City Department of Health.
  • Standard and Reference Guide for Professional Mold Remediation (IICRC S520): by the Institute of Inspection, Cleaning and Restoration Certification (IICRC).
  • Mold Remediation in Schools and Commercial Buildings (2001): by the US Environmental Protection Agency.

Some of these mold removal guidelines can be obtained free online. When determining appropriate mold remediation level, one has to consider the total area affected (the perimeter of affected materials) and the density of the mold growth. The Guidelines for the Canadian Construction Industry recognizes 3 remediation levels for building finishes and components (e.g., drywall, ceiling tile, carpet, etc.). These are:

  • Level 1 (Small Scale): Areas less than 1 square metre (10 square feet)
  • Level ll (Medium Scale): Areas between 1-10 square metres (10-100 square feet)
  • Level lll (Large Scale): Areas greater than 10 square metres (≥100 square feet)

For more details about mold removal consult the various guidelines and/or consult a professional. For those working in the fields of mold investigation and remediation, you may want to register for our mold training course entitled “How To Recognize Indoor Mould, Develop Effective Sampling Strategies, Interpret Laboratory Results, And Remediate Mould Contamination“. For the course details and available dates click http://www.moldbacteria.com/training.html

For more information regarding mold removal please contact us at 905-290-9101 in Ontario or 604-435-6555 in British Columbia.

 

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Did You Know To Control Mold Growth, Moisture Should be Reduced?

It is good to know not all molds that occur in homes are hazardous. However, current Canadian mold guidelines advise building occupants to clean-up and/or remove visible mold growth. To control mold growth, moisture should be eliminated or reduced. To learn more click Mold In Your Home.

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Online Listing Of Mould Testing And Remediation Companies In Canada

A free online listing of mould testing and remediation companies in Canada is available at http://www.moldbacteria.com/servicelist.html. The listing is intended to help Canadians locate mould testing or remediation services near their area. All companies dealing with indoor mould and bacteria are free to list their services.

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