DIYvan Interior Backing Frame for Vent Installation

A frame that is used on the inside of the roof with our patent-pending outside vent adapters for a 14" x 14" hole. This frame will not work in the rear-most roof panel in the Ford Transit 148WB regular length. We have shorter strips for that application, https://diyvan.com/collections/roof-vent-adapters/products/ford-transit-inside-rear-support-strips-for-148wb-and-130wb Provides material for screws to engage as they penetrate the roof metal. Made from expanded PVC so will not rot, mold or absorb moisture which is typically found around the vent. 14" x 14" inside opening and 16.75" x 16.75" outside dimensions. Available in two thicknesses. 1/2" and 3/4". 1/2" thickness is more flexible and will bend to fit the curvature of the roof if needed. 3/4" thickness is more rigid so will need a thicker bead of adhesive to make full contact with the interior roof surface. Multiple frames can be stacked to make up the difference between skin and headliner. Also, see our framing strips if more