Getty ImagesNearly 3 years before a Florida condominium tower collapsed, an engineer warned that the buildings failed waterproofing of its swimming pool deck was triggering “major structural damage,” according to filings.Champlain Towers South, the 12-story condo tower in Surfside, Florida, partially collapsed in the middle of the night on Thursday. As rescue efforts continue, the city of Surfside has actually launched a number of documents about the building.Among the filings released by Surfside authorities late Friday is a 2018 field study report from Morabito Consultants, which found that the concrete structural slab beneath the structures swimming pool needed repairs.”Failure to change the waterproofing in the near future will cause the level of the concrete deterioration to broaden significantly,” the report said.A view of the site throughout a rescue operation of a 12-storey Champlain Tower partly collapsed in Surfside, Florida, United States, on June 25, 2021.