The Vent That ProtectsThe 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.
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!
Subflashing
| SKU | Top size in inches | Flange Size in inches | NFVA IN SQUARE INCHES |
|---|---|---|---|
| VSB7519* | 8×19 | 15×26.75 | 108 |
| VSB1212 | 13.5×13.5 | 20 x 20 | 105 |
| VSB8585 | 10×10 | 16.5 x 16.5 | 54 |
“NFVA”: Net free ventilation area. This indicates the amount of open ventilation, measured in square inches.
Our sub-flashing is compatible with almost ALL popular roof dormer vents. Installation is usually dead simple.
