The Woodwright (not Renewal By Andersen) is the official replacement window for Andersen windows. It can be bought at any retail outlet that sells Andersen products. It can be installed by anyone. RBA is a separate company that is owned by Andersen. It is marketed thru privately owned franchises that have protected territories. It must be installed by the franchise. The Woodwright is a wood frame window that has fibrex (vinyl) claded to the exterior for weather protection. The RBA is an all vinyl (fibrex) window. The Woodwright is stronger and... read full review »