What does "double galazed to main elevation" mean?

[LittlePeanut]

Sorry, probably a daft question.

Does it mean that the ground floor is all double glazed? Or jut the front of the house? or what?

Thanks!

I would assume main is front, so double glazing on the front of the building?

I would take it to mean the front of the house, upstairs and downstairs.

Thank you. It's a shame estate agents don't just speak normal english!