this post was submitted on 11 Mar 2024
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I would think the metal parts of roof might be reflecting signals all around the building, which would cause interference between devices. (there is a limited number of WiFi channels), it might work better with a plastic roof, or one with RF absorbers.
I don't think the roof would be good at reflecting signals back at the device, it scatters them all throughout the building, rasing the noise floor. In a way, phone hotspots can cause less interference then a proper access point because they use a lower transmit power, and allow the other devices to reduce power.