"Sun scald" occurs in winter when bark freezes after a warm day or when sunshine is reflected off of snow and onto the bark. It is also called "southwest injury". Young trees, with smooth barks, are the most susceptible to sun scald.
Paul James, with Southwood Landscape and Garden Center, says the best way to protect these trees is to wrap them.
Paul says there are several different things that can be used to wrap trees. Pipe insulation material, tree wraps, heavy cardboard or tree guards all do the trick.
Click on the video, attached to this story, for more information on how to wrap your trees correctly.