Found a table with attenuation by frequency and building material, e.g. low-emission glass can block more than concrete, https://www.signalbooster.com/blogs/new

Found a table with attenuation by frequency and building material, e.g. low-emission glass can block more than concrete, https://www.signalbooster.com/blogs/news/how-much-which-building-materials-block-cellular-wifi-signals https://www.signalbooster.com/blogs/news/how-much-which-buil... 800Mhz 1900Mhz 1/2" Drywall 2.03 dB 2.43 dB Venetian Plaster 7.91 dB 16.22 dB 6" Concrete Wall 10.11 dB 19.41 dB Glass Window 4.35 dB 4.38 dB Low Emission Glass 33.8 dB 33.8 dB Brick 7.57 dB 14.66 dB Solid Wooden Door 6.11 dB 12.33 dB