Triangle Louver Vent
sku: trlv (crate/shipping included)


Triangle Louver Vent

Item # trlv
Lead time: apx 3 to 6 weeks
Collection: Signature Series
Department: Custom Triangle Louver Vents
Shape: Triangular / Triangle
Material: .019 aluminum trim coil / sheet metal
Part options: height, width, depth, flange, color, vented

100% customizable louver triangle gable wall vent or roof vent.

Use our free Net Free Air Calculator to calculate the apx net free airflow of your triangle louvered vent before ordering.

How to Calculate Net Free Area

Triangle louver gable vents are customized and manufactured upon ordering to match the style and type of install of the project. By making these attic vents so custom and specific, most installs take less than 5 minutes. No excess cutting, trimming or filling in the opening for the vent to fit.

All louver vents are manufactured with the 4-fold louvers locking onto a rail for extended life and strength of the vent. No facing or exposed pop rivets to pop out. Louvers stand straight and true.


Any customization forgotten, enter it in the comments box.

What Customers Are Saying About Our Gable Vents

"Why don't other gable vent makers make their vents smaller to fit the opening? I haven't figured that out. But every time I get a vent I have to saw and chisel the opening bigger just a little. But this is wasting my time. Now that I know about your company I can just order the size I need and I know it will be small enough to fit the framing. This is my third gable vent order and every one has fit great. Thank You Very Much."

"Best vents I have bought in a while. I have been swindled many times in the past about the best vents. But these are the real deal. The edges are finished nice. The louvers stand up on their own. And there were no screws or staples or even pop rivets showing so I don't know what holds them together but they do look nice."

"No that is not my real name. I had those adjustable silver vents in my house. You know the ones that look like they are split or put together down the middle. Well, the louvers or slats fell out one by one over the years and they weren't really silver anymore. I wanted silver again, but I was told how flimsy it was. I run across this place and they had the sterling gray. The same color I had on my trim. That will work. I also took note of the center of the vent not being split. The slats are all one piece."

Venting an attic through a gable wall is the most inexpensive and natural way. Gable vents have worked for centuries to ensure a natural air flow through the attic to keep the space cooler and protect the home from early decay. As Onyx Xteriors offers limitless colors, shapes and sizes on gable vents, you can actually design your custom gable vent to fit your visual needs and your home's air intake needs. For basic shapes we offer triangle gable vents, square louver vents, round attic vents, octagon gable louvers, half round vent louver, tombstone gable wall vents, and cathedral wall gable vents. These shaped gable vents are available in louvered and decorative. Also in vented or functional and non vented or not functional. The square vents may also be called rectangle gable vents and the round may be called circle gable vents. These are the same. We also offer many common sizes for triangle pitch and other shapes. Triangle gable vents by pitch are usually measured by the base foot as seen below:

Quick Roof Pitch Reference

4/12 pitch gable vent: 24 x 4, 36 x 6, 48 x 8, 60 x 10, 72 x 12, 84 x 14, 96 x 16, 108 x 18, 120 x 20

5/12 pitch gable vent: 24 x 5, 36 x 7.5, 48 x 10, 60 x 12.5, 72 x 15, 84 x 17.5, 96 x 20, 108 x 22.5, 120 x 25

6/12 pitch gable vent: 24 x 6, 36 x 9, 48 x 12, 60 x 15, 72 x 18, 84 x 21, 96 x 24, 108 x 27, 120 x 30

7/12 pitch gable vent: 24 x 7, 36 x 10.5, 48 x 14, 60 x 17.5, 72 x 21, 84 x 24.5, 96 x 28, 108 x 31.5, 120 x 35

8/12 pitch gable vent: 24 x 8, 36 x 12, 48 x 16, 60 x 20, 72 x 24, 84 x 28, 96 x 32, 108 x 36, 120 x 40

9/12 pitch gable vent: 24 x 9, 36 x 13.5, 48 x 18, 60 x 22.5, 72 x 27, 84 x 31.5, 96 x 36, 108 x 40.5, 120 x 45

10/12 pitch gable vent: 24 x 10, 36 x 15, 48 x 20, 60 x 25, 72 x 30, 84 x 35, 96 x 40, 108 x 45, 120 x 50

11/12 pitch gable vent: 24 x 11, 36 x 16.5, 48 x 22, 60 x 27.5, 72 x 33, 84 x 38.5, 96 x 44, 108 x 49.5, 120 x 55

12/12 pitch gable vent: 24 x 12, 36 x 18, 48 x 24, 60 x 30, 72 x 36, 84 x 42, 96 x 48, 108 x 54, 120 x 60

14/12 pitch gable vent: 24 x 14, 36 x 21, 48 x 28, 60 x 35, 72 x 42, 84 x 49, 96 x 56, 108 x 63, 120 x 70

16/12 pitch gable vent: 24 x 16, 36 x 24, 48 x 32, 60 x 40, 72 x 48, 84 x 56, 96 x 64, 108 x 72, 120 x 80

These triangle gable vent measures are represented by width x height.

Quick Reference for Triangle Vents

Measuring is easier than most think.

Why not order by the vent pitch? Because if the framer was off the line when cutting the rafters, the entire roof line will not be an 8/12 pitch, but rather an 8.2 pitch or a 7.8 pitch. Just a fraction on a rafter cut with a saw can change the measure of the vent by several inches.

How to Measure

"Opening size" just means the measures were of the hole in the wall. For this, we will reduce your measures 1/4 inch dimensionally to ensure a good fit. Do not deduct measures yourself. They will not be accurate.

"Tip to tip" is if the vent size itself is to be the measures ordered with no reductions.

A "boxed base" is squared and boxed for a wall install.

The "roof pitch angle base" is in reference to the vent sitting directly onto the roof metal or shingles. For this, type the pitch into the comments box and we will pre-set the base at that angle.

Vent Depth

The depth of the vent is as shown in the changing pictures. So, just how thick the vent will be or how far it will protrude into the gable wall.

Flange / Nail Fin

Offering all 4 mounting styles.


If the triangle vent will be painted or is matching a painted home color, enter primed white into the "color" box. Otherwise, enter the trim coil manufacturer and the color name and the finish.


Aluminum screen for the back of the vent is a bug screen for crawling and flying insects.

The grasshoppers and wasps can chew through the fiberglass screen.

The non vented has a solid metal back to block all air and water so it is decorative only.

And the wire mesh option automatically comes with aluminum screen to provide both bug and larger 4 legged critter protection (squirrels, raccoons, roof rats).

Example Triangle Louver Vents…

1 inch No Flange

1 inch Front Flange

1 inch Back Flange

1 inch J Channel

2 inch No Flange

2 inch Front Flange

2 inch Back Flange

2 inch J Channel

4 inch No Flange

4 inch Front Flange

4 inch Back Flange

4 inch J Channel

6 inch No Flange

6 inch Front Flange

6 inch Back Flange

6 inch J Channel


Shipping small products will be via UPS Ground or UPS Oversize Ground in wooden crates to ensure the product safety during shipping.

Larger aluminum products ship with SAIA Freight. These too are packaged in wooden crates. Freight items require a commercial delivery address or will be delivered to the nearest freight hub for individual pick up. Residential delivery is not available to all addresses.

If any product ordered is over 48 inches, call 901.281.2887 to find out if it will ship ground or freight.

Most items ship within 3 weeks. But due to some current shipping delays, always order products a month or more in advance to ensure delivery before needed. Stocking many of the commonly ordered colors speeds up the lead time drastically, but not on all.