Homeowners sometimes hear that a metal roof will ruin cellular reception or Wi-Fi. That claim leaves out how wireless signals actually move through a house.
Wi-Fi problems usually begin inside the home
Router placement, distance, thick interior walls, appliances, competing networks, and older equipment commonly affect Wi-Fi performance. A router placed in a basement or at one end of a large house may struggle regardless of the roofing material.
Cellular service depends on many factors
Distance from the nearest tower, terrain, trees, wall construction, low-emissivity windows, and the carrier’s network can all influence reception. A roof alone is rarely a useful diagnosis.
Test before blaming the roof
Compare signal strength outdoors and in several rooms, move the router to a central elevated location, update equipment, and consider a mesh system or carrier-approved booster when needed.
A durable Interlock aluminum roof can protect the home without preventing a properly designed home network from working. Read more metal-roofing answers.