Work began this month on the two-level re-roofing project TMG is overseeing at the Air Traffic Control Tower at Reagan Washington National Airport.

The top-most portion of the structure's roof is constructed of steel and metal. Joints will be re-sealed, and hard surfaces will be scraped and then painted. The lower portion of the roof also serves as a catwalk. On this level, the existing pavers will be removed, the substrate repaired, and new roofing membrane and walk-pads installed.

To access this job, TMG is working with the same company that installed the scaffolding for the renovation of the Washington Monument. An intricate four-story scaffold is being erected which will serve as the basis for yet another scaffold, this one a swing-stage raised and lowered by means of 12 cables and six motors. This will allow movement of the platform between the different levels of the tower without blocking the view of the Air Traffic Controllers as the ATCT roofs are redone. In addition to the use of netting, care is being taken to protect the lower levels of the terminal below, in particular the glass-covered awnings over the entranceways.

Once work on the exterior of the ATCT is complete, the crew will move inside to work on climate controlling the "attic" space immediately below the uppermost roof. This will involve spraying insulation, sealing the core area and painting.