Cupolas
Stephenson
Model
No.
Roof
Opening
Size and Style
Recommendations
24-A 13" x 13" 96 Sq. In.
Ventilation
Area
Single Garage,
Breezeway or
Small Building
up to 22" long 24-C
27-A 16" x 16" 120 Sq. In.
Ventilation
Area
Small Home or
Garage
15' to 25'
Ridge Length 27-C
30-A 19" x 19" 175 Sq. In.
Ventilation
Area
Large Garage,
Attached Garage
or Home 20' to 30'
Ridge Length 30-C
36-A † 21" x 21" 214 Sq. In.
Ventilation
Area
Attached Garage
or Home
30' to 45'
Ridge Length 36-C
42-A † 26" x 26" 320 Sq. In.
Ventilation
Area
Home or Commercial
Building
40' to 55'
Ridge Length 42-C
48-A † 28" x 28" 386 Sq. In.
Ventilation
Area
Home or
Commercial Building
More than 50'
Ridge Length 48-C
25x33-A 16" x 16" 150 Sq. In.
Ventilation
Area
Large Garage,
Attached Garage or
Home -15' to 25'
Ridge Length 25x33-C
28x45-A † 19" x 19" 216 Sq. In.
Ventilation
Area
Home or
Commercial Building
20' to 35'
Ridge Length 28x45-C
36x55-A † 24" x 24" 353 Sq. In.
Ventilation
Area
Home or
Commercial Building
30' to 50'
Ridge Length 36x55-C
36x37-A † 15" x 15" 130 Sq. In.
Ventilation
Area
Home or
Commercial Building
35' to 50'
Ridge Length 36x37-C
42x48-A † 18" x 18" 192 Sq. In.
Ventilation
Area
Home or
Commercial Building
more than 50'
Ridge Length 42x48-C
Standard
( 4;Sided)
Base
Specifications*
Approx.
Height
Maximum
Pitch
22" x 22" x 9"
25"
8/12
25" x 25" x 9"
26"
7/12
29" x 29" x 12"
31"
8/12
35" x 35" x 12"
33"
7/12
42" x 42" x 15"
40"
8/12
48" x 48" x 15"
42"
7/12
Governor
( 4;Sided)
21" x 21" x 12"
41"
12/12
24" x 24" x 16"
51"
15/12
30" x 30" x 16"
59"
12/12
President
(6;Sided)
Side to Side
25" x 25" x 16"
Corner to Corner
34" x 34" x 36"
Side to Side
29" x 29" x 16"
Corner to Corner
34" x 34" x 36"
46"
12/12
52"
12/12
43x72-A †
(8 sides)
43x72-C
(8 sides)
23" x 23"
323 Sq. In.
Ventilation
Area
Larger Colonial
Style Home or
Garage with
Steep Roof
38" x 38" x 24"
71"
14/12
A-;Aluminum;Clad;Roof
C-;Copper;Clad;Roof
**;Size;opening;to;be;cut;in;Roof;to;achieve;maximum;use;of;Cupola;Louvers.
†;Contact;your;BROSCO;Dealer;for;availability.
*;Cupola;bases;are;shipped;non-assembled.
B361
