About 20 minutes ago the inside pane glass of my patio door glass spontaneously shattered with a huge bang. It is still gently crackling. The door is 20 Years old. It is aluminium sliding and still opens ok, so it cant have been stress from the frame.
Any ideas what happened.
Would this be a good opportunity to replace the door as the wooden frame is rotting at the bottom.
Is it likely the other panes will go in the same way if not is it relatively cheap to replace a 190x80cm pane in a sliding unit.