Does 5G penetrate metal?

5 GHz networks do not penetrate solid objects such as walls nearly as well as do 2.4 GHz signals . This can limit an access points reach inside buildings like homes and offices where many walls may come between a wireless antenna and the user.

Along with 3G and 4G LTE, metal roofs deflect 5G signals the most because 5G uses higher frequencies that can penetrate metal the least .

“This is very useful for wireless communications because mmWaves experience extreme blockage from most objects, which has a deleterious effect on the wireless links,” Trichopoulos said, describing how the 6G spectrum waves can be easily blocked, unlike 4G signals that can typically penetrate walls.