Why Do Lightning Rods Protect Some Homes but Not Others?

A lightning rod, also called an air terminal, is the visible metal rod on your roof. Its job is to intercept a lightning strike and safely channel the electrical current down to the ground. The system includes the rod, a heavy cable, and ground rods buried in the earth.

For the system to work, every connection must be tight and without corrosion. The cable must run in a straight, short path to the ground. If the cable is loose, broken, or too long with sharp bends, the current may jump to other metal parts of your home, causing damage instead of preventing it.

Grounding is the path that carries lightning current safely into the earth. Without a solid ground connection, the current may travel through your home's wiring or plumbing, causing fires or electrocution risks. Bonding connects all separate metal systems, like water pipes and electrical panels, to the same ground, so they share a single path.

If your home has plastic pipes or other non-conductive materials, the bonding requirements change. A qualified electrician or lightning protection professional can inspect your grounding system and make sure it meets current codes. This is not a DIY project, as mistakes can be dangerous.

If lightning hits your home or nearby, first check for fire or gas leaks. If you smell gas or see flames, leave the house and call emergency services. After the storm passes, inspect for damage, such as cracked walls, broken windows, or water leaks from roof damage.

Lightning can cause water damage if it splits a roof or shatters a chimney. Water may enter through the gap and soak drywall, insulation, or flooring. If you find water damage, take photos, dry the area quickly, and contact a local water damage pro to assess the extent and begin cleanup.