Roof systems during the winter / options?

Are there any flat roofing systems that can be applied during the cold winter months / other than torchdowns and hot ? what are they or do we wait untill spring ? Please comment with a possible list and temps of install only if you do know …thanks…

Wait for spring

Yes, wait for spring!!!

Most systems want 45 degrees and rising for proper application. Even torch applied modified!

pitch!!!now go get a mop!