--> VELUX Fixed Skylight | Curb Mounted Skylights

FCM - Fixed Skylight

Curb Mounted

Skylight sizes for FCM skylights

FCM Size Code
1430
1446
2222
2230
2234
2246
2270
3030
3046
3434
3446
4646
Inside curb (W"xH") 1412 x
3012
1412 x
4612
2212 x
2212
2212 x
3012
2212 x
3412
2212 x
4612
2212 x
7012
3012 x
3012
3012 x
4612
3412 x
3412
3412 x
4612
4612 x
4612
Outside curb (W"xH") 1712 x
3312
1712 x
4912
2512 x
2512
2512 x
3312
2512 x
3712
2512 x
4912
2512 x
7312
3312 x
3312
3312 x
4912
3712 x
3712
3712 x
4912
4912 x
4912
Maximum skylight clearance (W"xH") 1858 x
3458
1858 x
5058
2658 x
2658
2658 x
3458
2658 x
3858
2658 x
5058
2658 x
7358
3458 x
3458
3458 x
5058
3858 x
3858
3858 x
5058
5058 x
5058


Flashing systems for FCM skylights

Description Roofing material Roof pitch Product code
Step flashing w/
adhesive underlayment
Asphalt shingles,
wood shakes and flat tile
10°-60° ECL 0000C
High profile flashing w/
adhesive underlayment
Tile 14°-60° ECW 0000C


Installing a skylight is easier with the Instant Light Shaft

The Instant Light Shaft is faster, cleaner, more efficient and cost-effective than traditional drywall installation. It can be installed in an hour versus 20 hours over 3 days - it's that easy!

• Works on all "box" type, 90° light shafts (no flare).

• 16" standard depth (trim to actual on site).

• All other pieces are pre-cut to size to be site assembled.

• 4" minimum spacing required around all sides if multiple skylights are installed