Luckily there's mostly roof above this particular room, so there's minimal population there. As for below, the room was literally built on top of a (now decommissioned) training nuclear reactor, so I think it's safe to say that it's already better shielded than any paint I can find =)
Frank Sweetser Director of Network Operations Worcester Polytechnic Institute "For every problem, there is a solution that is simple, elegant, and wrong." - HL Mencken ________________________________ From: The EDUCAUSE Wireless Issues Constituent Group Listserv <WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU> on behalf of Robert Owens <bob...@ksu.edu> Sent: Thursday, February 16, 2017 4:58 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] Wifi blocking paint? Keep in mind that RF goes up and down as well. If this is a multistory building shielding has to be considered for floor and ceiling as well as walls. From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Chuck Enfield Sent: Thursday, February 16, 2017 3:52 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] Wifi blocking paint? If the lab needs to be completely isolated you’re going to want to hire a consultant to design a shielding system. If you just need enough attenuation to mitigate significant interference, I’ve heard good things about the yshield paint. You can add about 30-40dB of loss to a wall. If you can keep your radios 40-50 feet apart, this should isolate them from each other enough that they disappear into the noise floor. Keep in mind that it has to be grounded for maximum effect, and if I’m skeptical about the efficacy of the paint it’s mostly to do with this. Good bonding and grounding is hard, and carbon paint doesn’t strike me as a great medium for reliable bonding. That said, at Wi-Fi wavelengths ground quality shouldn’t be too much of a factor in attenuation as long as you keep antenna elements far enough from the walls to avoid near field effects. But if the grounding isn’t effective you could end up with excessive internal reflection in the lab. No problem if there’s a normal amount of absorptive material in the room, but could be a problem otherwise. Just my two cents. Chuck From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Sweetser, Frank E Sent: Thursday, February 16, 2017 3:27 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU<mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU> Subject: [WIRELESS-LAN] Wifi blocking paint? Hi all, we just got word that a professor here wants to start running a certificate program around a wireless lab setup. To mitigate any potential problems from this, we'd like to try to isolate the lab wireless to the one room as much possible. Does anyone have any recommendations for wifi blocking paint, or other building material choices and techniques? thanks! Frank Sweetser Director of Network Operations Worcester Polytechnic Institute "For every problem, there is a solution that is simple, elegant, and wrong." - HL Mencken ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/discuss. ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/discuss. ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/discuss. ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/discuss.
