Q: I’ve heard that “mold is everywhere.” If that’s so, how can I avoid it in my construction projects?

A: Mold spores are present in the air all the time. Because of this, spores can come to rest on building materials and components regardless of whether they are installed or stored. During the early stages of construction, though, when the materials are stored, they are probably most at risk.

The risk of mold growth doesn’t just come because spores are in the air. In fact, if left in a dry location, the spores most likely wouldn’t grow. The one factor that encourages the growth of mold on virtually any organic material is the addition of moisture, so try to keep your materials dry.

However, the cost of providing dry storage for every piece of material that could support the growth of mold can rise quickly. Our experience shows that you will not be able to protect everything, no matter how hard you try. So what’s a contractor to do?

Covered storage of any kind is the best first line of defense. Once materials are stored, you’ve got to find ways to control ambient airflow and relative humidity levels. If you’re storing organic materials (plywood, drywall, lumber or anything else that can serve as a food source), make sure it’s under cover and well ventilated.

Staging the delivery of your construction materials is another good option, but this can be a real headache if your space is short. Ask your supplier to manage your inventory in his warehouse. If you’ve developed a good relationship, your supplier should work with you on this option.

Finally, talk with the design professionals about the completion schedule. Deadlines calling for you to begin finishing the interior before the exterior is sealed have led to problems on several projects that we’ve gotten involved in. Ultimately the projects have stalled for many weeks waiting to address the removal of mold growth. And everyone has lost in the long run.

Travis West is the president of Building Air Quality Inc., a Houston-based indoor air quality consulting firm. He can be reached at twest@baq1.com, or toll-free at 866-367-1177.

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If you have a question for a mold expert, please send it to Brett Lyon, senior editor of construction.com at brett_lyon@mcgraw-hill.com.