Shaped Extension Jambs

Extension Jambs are made with ¾" bending plywood with a clear poplar face, or ¾" cellular PVC. Extension Jambs are available in any shape or size, however, a template must be provided for ovals and ellipticals. For straight PVC used as Extension Jambs, please refer to our section on PVC Boards. Straight wood Extension Jambs can be found in the Straight Mouldings section of this site.