Lengthy repair, cleaning project kicks off at Jefferson Memorial

The National Park Service said Thursday that it has started a 15-month project to restore the roof and clean the marble at the Jefferson Memorial.

Two of the flat roofs that circle the dome to keep the memorial watertight and dry will be replaced. Large marble slabs covering the memorial’s portico will be lifted to fix deteriorated waterproofing underneath.

https://www.washingtonpost.com/local/jefferson-memorial-to-get-roof-repair-laser-cleaning/2019/02/07/852375b2-2af1-11e9-984d-9b8fba003e81_story.html?utm_term=.8a9e1267cd3e