Back flange 4/12 Triangle Gable Vent Signature Series

What vent wall depth do you need for your 4/12 gable vent

We offer a back flange on our 4/12 aluminum gable vents in the depth you need for placing a gable vent in stucco, behind brick, and behind wood siding.  You can also use a back flange aluminum gable vent for an inside attic space gable vent install.  

Standard sizes for a back flange 4/12 triangle vent with a back flange are as follows:

for an extra small wall opening 2 foot base 24" x 4" triangle vent on a 4/12 pitch 

small gable wall 3 foot base bottom 36" x 6" triangle vent on a 4/12 pitch 

average small vent 4 foot base across 48" x 8" triangle vent on a 4/12 pitch 

average size vent 5 foot base length 60" x 10" triangle vent on a 4/12 pitch 

good size gable vent 6 foot base measure 72" x 12" triangle vent on a 4/12 pitch 

good venting 7 foot base width 84" x 14" triangle vent on a 4/12 pitch 

large triangle vent 8 foot base across the bottom 96" x 16" triangle vent on a 4/12 pitch

greater venting 9 foot base or bottom 108" x 18" triangle vent on a 4/12 pitch 

extra large triangle gable vent 10 foot base wide 120" x 20" triangle vent on a 4/12 pitch 

Choose your 4/12 triangle vent size from extra small, small, average, large and extra large.  The aluminum vent extra large is obviousely the best for venting your attic.  The extra small aluminum gable vent is good for small gables and small attics.