they also started installing 1" R5 rigid foam insulation and Tyvek house wrap on the walls. This extra insulation should help keep the heat inside the house. a wood framed house looses heat at all the studs, so exterior foam covers all the studs to stop that heat loss.
3/4" tongue + groove OSB roof sheathing
peel + stick ice guard
sheathing on the west side of the roof
screen porch roof
east side done, with temporary 2x4 anti-slip bars