First world problems - Rf Shielding....

In the middle of a journey to construct a world-class listening environment. One of the individuals assisting me worked on a room where they installed a faraday cage (copper) and suggested I may want to consider this as an option. Despite a lot of research, I cannot find anything which would substantiate that the use of a faraday cage type installation would actually impact Rf interference for a low power, all tube system. The room being constructed has two large windows (9'x15' & 3'x15') an entrance door (steel and glass, also 9'x15') along with several large HVAC vents for supply and return, none of which could be covered in copper.  Additionally, the research I was able to uncover suggested that for a properly installed faraday cage, the copper needs to be soldered together on all edges, which would require well over a 1000' of soldering. Does anyone in the community have any information on the value of shielding, the ability of shielding to work if there are several large glass openings or anything else germane to my situation. In advance of any responses, thank you for your help!