What size skylight do I need?
Velux offers a wide array of Energy Star rated skylights and sizes to choose from, but do not be overwhelmed! The pitch of your roof and spacing of your home’s rafters/trusses will narrow the options significantly.
Skylight Specialists is here to help you choose the option that works best for you, your home and your family.
Our estimates are painless!
Solar/Manual Venting:
The Solar Fresh Air and manual Fresh Air skylights share the same size options.
Adding fresh air and ventilation to a home is essential to health and well-being.
Curb Mounted
![Roof Slope 0-60](https://skyspec.com/wp-content/images/velux/0-60.jpg)
VCS/VCM Size Code | Inside curb* |
---|---|
2222 | 22½ x 22½ |
2234 | 22½ x 34½ |
2246 | 22½ x 46½ |
3030 | 30½ x 30½ |
3046 | 30½ x 46½ |
3434 | 34½ x 34½ |
4646 | 46½ 46½ |
Deck Mounted
![Roof Slope 14-60](https://skyspec.com/wp-content/images/velux/14-60.jpg)
VS/VSS Size Code | Rough opening* |
---|---|
C01 | 21 x 27 |
C04 | 21 x 38 |
C06 | 21 x 45¾ |
C08 | 21 x 54½ |
M02 | 30 x 30 |
M04 | 30 x 38 |
M06 | 30 x 45¾ |
M08 | 30 x 54½ |
S01 | 44¼ x 27 |
S06 | 44¼ x 45¾ |
Fixed Skylights:
Curb Mounted
![Roof Slope 0-60](https://skyspec.com/wp-content/images/velux/0-60.jpg)
FCM Size Code | Inside curb* |
---|---|
1430 | 14½ x 30½ |
1446 | 14½ x 46½ |
2222 | 22½ x 22½ |
2230 | 22½ x 30½ |
2234 | 22½ x 34½ |
2246 | 22½ x 46½ |
2270 | 22½ x 70½ |
3030 | 30½ x 30½ |
3046 | 30½ x 46½ |
3055 | 30½ x 55½ |
3434 | 34½ x 34½ |
3446 | 34½ x 46½ |
4646 | 46½ 46½ |
4672 | 46½ x 72½ |
Deck Mounted
![Roof Slope 14-60](https://skyspec.com/wp-content/images/velux/14-60.jpg)
FS Size Code | Rough opening* |
---|---|
A06 | 14½ x 45¾ |
C01 | 21 x 27 |
C04 | 21 x 38 |
C06 | 21 x 45¾ |
C08 | 21 x 54½ |
C12 | 21 x 70¼ |
D26 | 22½ x 23 |
D06 | 22½ x 45¾ |
M02 | 30 x 30 |
M04 | 30 x 38 |
M06 | 30 x 45¾ |
M08 | 30 x 54½ |
S01 | 44¼ x 27 |
S06 | 44¼ x 45¾ |