VCM - Manual "Fresh Air" Skylight

Curb Mounted

Manual Fresh Air Skylight
VELUX energy performance skylights

Skylight sizes for VCM skylights

VCM Size Code
2222
2234
2246
3030
3046
3434
4646
Inside curb (W"xH") 2212 x
2212
2212 x
3412
2212 x
4612
3012 x
3012
3012 x
4612
3412 x
3412
4612 x
4612
Outside curb (W"xH") 2512 x
2512
2512 x
3712
2512 x
4912
3312 x
3312
3312 x
4912
3712 x
3712
4912 x
4912
Maximum skylight clearance (W"xH") 26916 x
26916
26916 x
38916
26916 x
50916
34916 x
34916
34916 x
50916
38916 x
38916
50916 x
50916


Flashing systems for VCM 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