I think the position is far from clear, the information given by Motability in their summary is contradictory, the summary does state but you will need to read your insurance cover booklet for full details The summary mixes up similar terms Repair or replacement of glass If your window or windscreen needs to be replaced, you must make a claim through RSAM. You will need to pay an excess amount of £50. I suspect that the full insurance document will have the terms fully defined, glass, in my view would encompass window or windscreen however I doubt that the wording is so loose in full agreement.
Just as an aside to this, in the aviation industry, there has been a distinct move away from using the term ‘glass’ for window/windscreen components.
This has been due to the fact that many windows in light (and some heavy) aircraft are made from non-glass polymer composites to save on weight and the fact that ‘glass’ is increasingly used nowadays to refer to instrumentation (as in ‘glass cockpits’ – meaning LCD/LED instrumentation as opposed to traditional dials/gauges).
Hence I agree the word ‘glass’ nowadays has such wide-ranging meanings, it more or less renders the word ubiquitous. So much so that the component (and not what it is made of) becomes the descriptor in general parlance.
Dave