Building materials and building style does matters quite a bit and wifi-done-safe LLC has solutions to maximize your Wi-Fi signals. Below are some of the big influencers when it comes to Wi-Fi signal degredation. 1) plaster with wire mesh walls - your fastest signals don't care for these types of walls 2) pre-1990s styled building in general makes Wi-Fi signals weaker 3) entry point of your internet service 4) number of floors