Velux Skylight Sizes

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!

Schedule a Free Estimate or call 303-761-2200

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

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

*(W” x H”) to the nearest 1⁄4″

Deck Mounted

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

*(W” x H”) to the nearest 1⁄4″

Fixed Skylights:

Curb Mounted

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

*(W” x H”) to the nearest 1⁄4″

Custom FCM

outside_curb_mount_dimension — The skylight sits on the curb like a shoe box lid.

Width	Length	Production
18^¾ to 50³⁄₄	18¾ to 72	8-14 days
18^¾ to 50³⁄₄	72¼ -76½	20 days

In ¹⁄₄ inch increments. Blinds not available.

Deck Mounted

FS Size Code	Rough opening*
A06	14½ x 45¾
C01	21 x 27
C04	21 x 38
C06	21 x 45^¾
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