<www.youtube.com/watch?v=6Nqn5MgvMDA> (1:10 mins)
The concrete tile parts of the old roofing are being removed in advance of the main re-roofing project; the new “titanium” brand roofing paper is installed as full interim waterproofing. This is what that process looks (and sounds) like on the 3rd day after a cluster was started.
End of Day 4 of this cluster: 4 of 8 units had new roofing paper.
Day 5: concrete tiles, previously stacked on last 4 roofs, were put into the boom and removed, as was remaining old roofing paper.