I have several windows that the seils are broken. I would like to replace the glass. Is this possible without having a professional do the job for you? I noticed the window has a grey piping around both sides of the two pieces of glass. I have been told there is air between the two pieces of glass. If I can do this myself where can I go for the replacements? Would HomeDepot have what I need or Lowe's? I do not want to replace the complete window at this time. I hear people talking about this problem all the time. Thanks very much.