Sub Flashing

sub flashing for vents

The Vulcan Sub Flash.

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.
Simply install Sub Base over hole in sheeting, paper around it and install dormer vent over the top. The flushing can also be reversed if a flush surface is required.


SKUTop size in inchesFlange Size in inchesNFVA IN SQUARE INCHES
Contact us for custom sizes.Net Free Ventilation Area
VSB121213.5×13.520 x 20105
VSB858510×1016.5 x 16.554
*Is watertight, inquire for more info.

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!