"effi" wrote in message
the issue is the safety of exposed styrofoam in a residence, which may be
addressed by building codes

i don't recall seeing any exposed styrofoam (or any kind of foam for that
matter) in new residential building lately...

When use as insulation for walls, etc, it should be covered with sheetrock
to comply with codes. A couple of pieces for a bird feeder would not come
under any codes. It is not a highly flammable material. It does not
spontaneously combust. In the situation posed by the OP, it is no more
dangerous that the drapes or curtains hanging on the window or many of the
other materials normally found in a house. I doubt you keep the newspaper
in a fireproof container.

Want to see how foam is used in a house/ www.polysteel.com or
www.integraspec.com