Critical issues about EverGreen for architects

The following is a brief overview of some of the most important points pertaining to the EverGreen™ patination process, and potential damage caused by certain substances. For complete details, consult with the Revere Architectural Services Department (1-800-448-1776 ext. 2707 or 2474)

EverGreen Patination

1) EverGreens' patina crystals form on the surface and slowly transform to copper-chloride-hydroxides when exposed to moisture over time. The rate of change is affected by variables such as temperature and degree of exposure.

2) EverGreen is a natural product, and there will always be color differences with natural patinas. It will not appear flat or uniform like a painted surface, but will have the warm, pleasing effect of natural color variations.

3) Most EverGreen is used in exterior applications where rain, condensation, and/or dew promote maturation. When EverGreen is used for interior finishes, maturation is dependent entirely upon humidity- as a result, hydration may occur extremely slowly, or not at all.

4) The appearance of everGreen will vary from one case to another, and from one production run to another. Mixing sheets from different production runs on a single elevation can result in an irregular patterned appearance.

EverGreen Limitations

1) Care should be taken when using EverGreen below or in conjunction with mortar, cedar, and other materials which can leach acids. Such acids are among the few substances that attack copper's naturally formed patina. When the dilute from these substances leach onto copper, they retard, discolor and/or remove natural patina.

2) Iron and steel do not corrode copper, bust rust from these materials can severely discolor or adversely affect patina. Runoff from these metals onto EverGreen must be prevented, and care must be taken to remove iron and steel fines (grinding swarf), nails, fasteners, etc.