Molds in your School: an IPM Approach

Molds are naturally occurring fungi, but can cause health problems when growing indoors.
Photo: epa.gov/mold/images/firewood.

What is mold?

Molds are naturally occurring fungi. Their spores are found everywhere, but they are microscopic, so we don't see them. Once spores find a moist environment and begin to mature into mold growths. There are many types of molds and they assume various shapes and colors.

Why is mold important?

Molds help break down decaying materials outdoors and are very beneficial in this capacity. Indoors, however, they should be avoided. Indoors, molds can produce allergens (substances that produce an allergic reaction in humans), irritants, and, in some cases, toxins.

Why are molds in my school?

Molds need a wet, or at least moist, environment to grow. Roof or plumbing leaks, cluttered kitchen areas, bathrooms and locker rooms, and drafty windows can all be sources of moisture.

What can I do about mold if it exists indoors?

• If on fabric, upholstery, drywall, or carpet- nothing but remove the moldy material. If wood is properly cleaned and sanded, some primers contain mold-resistant compounds. Painting over moldy wood or drywall results in peeling paint.
• Fix all plumbing or roofing leaks that are sources of moisture, then thoroughly dry out area.
• Windows can be double-paned or more-effectively sealed for moisture control in the winter. Note: Caulk will not stick to moldy surfaces.
• Improve ventilation.
• If on solid surfaces, thoroughly clean area with detergent and water. Then dry the area. Dehumidifiers or dry air currents over the area will help as well.
• If that doesn't work, try bleach-and-water solution as directed by manufacturer.
• Make sure to wear protective masks and gloves when dealing with mold cleanup.

Suggested References:

A Brief Guide to Mold, Moisture, and Your Home

Compiled by K.A. VanDyke, University of Wyoming, College of Agriculture, Dept. of Renewable Resources #3354, Laramie, WY 82071