As does my home..i live in a 1929 wood frame home with foiled insulation and so forth..i am picking up a signal from another router down the street..no..its not foolproof but i was surprised how good it did work..so the main PC is in the basement?..my signal has to go thru insulation..drop ceiling..plaster..3 wood floors and a few pieces of furniture..the signal in my daughters room...3 floors up..always runs around 60%..also i think the hardware will have some different effect..3 of the PCs have linksys wireless adaptors..one has a dell..the dell isnt as good..more directional it seems..another thought..put the router in a more central location..just run long ethernet cables..