Have a home renovation on the horizon? Whether you’re doing it yourself or hiring a professional, it’s important to know what materials you’ll be dealing with in your home. One of those materials might just be asbestos.

Asbestos is the common name for a group of naturally occurring mineral fibers. It’s great for thermal and electrical insulation, but very dangerous for our bodies. When asbestos-containing materials are disturbed and the fibers are released, it can affect the quality of the air we breathe. Inhaling or swallowing asbestos can cause serious health hazards, particularly if the exposure is prolonged.

While the presence of asbestos should be taken seriously, it’s no reason to panic. Here are three things you should know before you start that DIY home renovation project.