A qualified, knowledgeable roofer will know when and if any extra steps need to be taken to properly apply asphalt shingles in various temperatures and conditions. If a problem develops over the winter, leak or weather damage, it is better to get it checked and repaired or replaced instead of waiting until warmer temperatures. By that time a small issue might be a big problem.
There is an advantage to getting a new roof in the cold season. Roofers are usually less busy and will likely be able to get to your job sooner and with more manpower than in the busy spring and summer seasons.
If you know a new roof is on the horizon, don't be afraid to call a professional roofing contractor with a track record of quality work to get the job started at any time of year.
Craig Gouker Roofing has been installing quality residential roofing in South East Pittsburgh since 1991 and is the expert in shingle roof replacement.