With the average air temp. of 28,º and a wind blowing at 15 to 20 mph, the wind chill was in the neighborhood of 16º. The sunny dry conditions made installing the sheet metal roofing much safer however. Left: Jerry Prater Const. spent two days applying the TPO Single Ply Roof System on the flat roof area. The 60 mil membrane is rolled out and its seams are welded together.It was too cold this week for the painters to continue their pre-painting of the trim. Above: Installing some windows. Background image & upper right: With days that rarely got above freezing the boys chattered along on the standing seam metal roofing. They also took care of more roof framing and sheathing.