From the Japanese cypress to the ponderosa pine, wood has been used in construction for millennia. Though materials like steel and concrete have largely taken over large building construction, wood is making a comeback, increasingly being used in public and multi-story buildings for its environmental benefits. Of course, wood has often been passed over in favor of other materials because it is easily damaged by sunlight and moisture when used outdoors. Wood coatings have been designed to protect wood surfaces for this reason, but coating damage often starts before it becomes visible. Once the deterioration can be seen with the naked eye, it is already too late. To solve this problem, a team of researchers is working to create a simple but effective method of diagnosing this nearly invisible deterioration before the damage becomes irreparable.