Vinyl siding uses J channel at every siding panel end.
Why order a vent that needs more J channel applied?
These vents already have the J channel built in and ready to install.
The standard J channel on these is a 2 1/2" rear flange and 1" face to the J and spaced 1" apart.
This creates a full 1" x 1" pocket to receive the siding ends and give good coverage.
Siding needs room to expand and contract at a different rate than the wood wall.
But it is clear the back of the J channel is extending out past the face trim by 1 1/2".
From the side view, the depth of the receiving pocket is visible.
Now here is where it can get confusing.
Deeper vents can have the J Channel on the face of the vent and have the rest of the vent extend into the attic.
After the siding is installed, the face trim will be all that is visible.
Triangle vents can be set for siding J channel on the bottom and top of the vent.
Or the top of the vent can be set for soffit J channel.
This one is preset for siding on the bottom and soffit on the top.
These are options on the order form.
For this 36 x 36 x 1 Square Louver Vent, the J Channel was set for vinyl siding on all 4 sides.
Still have unanswered questions?
901.281.2887 contactus@onyxxteriors.com