Frame strips that are used on inside of roof with our patent pending outside vent adapters.
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.
framing strips are expanded PVC and bonded to the roof with a thick
bead of Windoweld. They are more flexible than wood and plenty strong to
support the vent and keep it from jiggling. They are essential if the span
between the OEM roof beams is more than 18". They also provide a backing
for the screws that hold up the vent interior bezel. They should be
placed 1/4" away from the edge of the hole so the screws for the vent go
into the strips.
If you have questions about this product you can call Hein at