Half Round Dormer Vents


Fire safe dormer vents

Critical for proper cooling of the attic:

our half round dormer vents are attractive, long lasting and fire resistant.
We have Low Profile Dormer Vents and Half-Round Dormer Vents available.
Half round prefix: VDR
Low profile prefix VDLR
We are the sole manufacturer of Vulcan Vents.

Half Round and Low Profile Dormers

SKUSIZE IN INCHESTYPENFVA IN INCHES
VDR122412 x 24Dormer, Round90
VDR9189 x 18Dormer, Round51
VDLR4194 x 19Dormer, LP56

NFVA: Net free ventilation area

Retrofit Half Round and Low Profile Dormers, Exterior

SKUSIZE IN INCHESTYPENFVA IN INCHES
VDR1224K12 x 24Dormer, Round Retrofit90
VDR918K9 x 18Dormer, Round Retrofit51
VDLR914K4 x 19Dormer, LP Retrofit56

Retrofit Half Round and Low Profile Dormers, Interior

SKUSIZE IN INCHESTYPENFVA IN INCHES
VM142413.5 x 24Matrix only: Dormer, Round RetrofitDepends*
VDR918T9 x 19Trim only: Dormer, Round RetrofitNo restriction
VDR918K9 x 19Full Kit: Dormer, Round RetrofitNo restriction
VM242424 x 24Dormer, Round RetrofitDepends*
VDLR419T4 x 19Trim only: Dormer, LP RetrofitDepends*
VDLR419K4 x 19Kit: Dormer, LP RetrofitDepends*
VDR122412 x 24Matrix only: Dormer, Round RetrofitDepends*
VM482448 X 24Matrix only: Dormer, Round RetrofitDepends*

The vent that protects. Vulcan Vent.