I've been thinking of soundproofing my basement, but alas am to poor to call in professionals so I must resort to ingenuity.. I have this idea for building a soundproof door, from what I know (which admitedly is not too much) this could be an effective (and inexpensive) solution. First off, this is for the door way at the bottom of the stairs in the basement, it is NOT a standard sized door way so custom work would have been necessary anyway. I would build a wooden frame to snuggly fit the opening, then side this frame with sound board - finally I would wrap the whole door with those sound blocking vinyl sheets. Afterwards I would line the edges with those rubber edges to make sure it seals tightly. The inside could be left hollow (as a sound chamber), or stuffed with fiberglass (or other better material?). Any thoughts on the potential effectiveness (or lack thereof) of this design?