This re-roof project My-Pros had to install on a 25 degree day in Feburary. The colder weather & wind with short daylight hours made this roof be a 2 day install. My-Pros did have to install 42 sheets (1,344 square feet) of new decking on the roof. We used decking clips on every sheet of plywood. Also we had to install 25 new baffle vents in the attic. The NorthGate Shingle color is Granite Gray and the color matched perfectly to the siding.