Posted: 25/01/2016 at 19:11
I'm happy to be wrong but on close inspection the guttering on your GH may have been put on upside down. The metal strip running along either side on my GH is the other way round, with the ridge turned up, if that makes sense, the metal strip on your GH is turned down so water won't gather in it and run off the ends.
What do other posters think ?
You can replace the glass with the putty round with a better fitting piece of glass. GH sheets of glass come in standard sizes and can be cut down to size if need be. Most glass cutters have a stock of standard size sheets.