We don’t consider cold temperatures to be ideal for roof installation, but sometimes it is necessary. When done properly and by experienced roofing contractors, roofing in the winter can be done successfully.
Some products require specific weather, but generally speaking, 40 degrees Fahrenheit and above can work okay for roofing. As home contractors, we prefer temps around 70 degrees for effective sealing. But, we can work around those challenges, when necessary.
Home contractors should have the experience to recommend when winter roofing is unsafe or less than ideal. If you’re concerned, inquire about the specific materials being used on your project. Most roofing supply companies have websites where information can be verified. Ask the contractor for brand and style information, then do some quick research.