RF Attenuation Values of typical Building Materials
06-09-2017 10:21 AM
I'm doing a WiFi design for new construction for the first time...no existing walls to measure signal loss. How do I predict the attenuation values of assorted walls based on their components? Some include significant sound-proofing batting. Is there a reference list of common building materials and their corresponding attenuation values? I appreciate any insight!
Re: RF Attenuation Values of typical Building Materials
07-07-2017 08:47 PM
According to the CWNA Official Study Guide, attenuation of building materials is as follows for 2.4 GHz:
Foundation wall | -15 dB
Brick, concrete, concrete blocks | -12 dB
Elevator or metal obstacle | -10 dB
Metal rack | -6 dB
Drywall or sheetrock | -3 dB
Nontinted glass windows | -3 dB
Wood door | -3 dB
Cubicle wall | -2 dB
I have also been told that anything that blocks sound or light can also block wi-fi. Soundproofed glass or walls will certainly be a problem.
Other random things to note are speakers (the magnets can interfere with RF, so place APs at a distance from any speakers) and large sources of water (large aquariums, water towers).
I'd also love a more comprehensive list myself, but hopefully that helps with the basics!