What temperature should it be for installing new roof?

It's best to do it on a moderately sunny day between 68-80 F. If the tiles are any kind of duroid or asphalt, leave them on the roof for 2-3 days before the job.
It's best to do it on a moderately sunny day between 68-80 F. If the tiles are any kind of duroid or asphalt, leave them on the roof for 2-3 days before the job.