Sub Flashing

The Vulcan Sub Flash is a remarkable product that can be used in conjunction with any other manufacturers dormer or roof vent and turn it into an ember and fire safe vent.

Contact us to custom order other sizes!





*Is watertight

Top Size in inches

13.5 x 13.5

10 x 10

8 x 19

Flange Size in inches

20 X 20

16.5 X 16.5

15 X 26.75

Net Folded Ventilation Area (sq. inches)




Our sub-flashing is compatible with any one of these popular roof vents and more not shown below.

Choose your favorite vent from any manufacturer and make it fire and ember safe!

The vent that protects. Vulcan Vent.

If you need a size not listed here, no problem. We also manufacture with copper bodies. Get in touch with us to see if we can work something out!

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The vent that protects. Vulcan Vent.