|We are in a bit of a discussion in the office. I have a supervisor who insists that we scan a roof (over gym) now. The ambient temperatures are betweeen -15ºC and -30ºC with wind chill. The surface of the roof is frozen with minimal to moderate snow coverage. The interior of the gym has ceiling tiles below a steel pan supporting a concrete deck. The concrete deck is approximately 6 to 8 inches thick. Can we or can we not scan the roof in the winter.