Covering Your Router In Aluminium Foil

A friend was given a suggestion by someone from IT to alleviate network connection issues. The suggestion is to wrap their router in "tin foil". When they'd finished laughing, they called me for an opinion.

Assuming they meant ordinary aluminium kitchen foil, the suggestion is ludicrous. The best you might hope for is that it doesn't make any difference. If it has any affect it would surely be to act as a Faraday cage, keeping external radiation out and internal radiation in.

I decided to test it. I performed six throughput runs alternating between uncovered and loosely covered with a folded sheet of kitchen foil. Each run consisted of three one-minute trials, where TCP upstream and downstream speeds were averaged using TamoSoft Throughput. The server was my development PC upstairs; the client a downstairs laptop two metres from the router. Both were connected on the 5GHz WiFi band.

Here are the results.

The best you can say for the foil is that is doesn't attenuate the wireless signal so much that it becomes unusable, but it is noticeably detrimental. In terms of resolving network issues you would be better off putting pepper in your socks.

Where do they get these people from?

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