Finish Groove Comparison
Side finish grooves
A21 (new) 1/16”
wider on each side
Interior
side of
skylight
VES (old)
Top and Bottom
finish grooves
A21 (new) 1/8” wider
on each end
Interior
side of
skylight
VES (old)
Finish groove difference from VES(old) to A21(new)
VES
(Old)
056
101
104
106
108
112
150
156
302
304
306
308
601
606
inch
inch
inch
inch
inch
inch
inch
inch
inch
inch
inch
inch
inch
inch
Inches are rounded to the nearest 1/16 inch.
A21
Finish Dimension
Finish Dimension
A21 finished opening larger by:
(New)
A06 inch 13 1/4 X 44 5/16
1/8" X 1/4"
13 1/8 X 44 1/16
C01 inch 19 1/2 X 25 7/16
1/8" X 1/4"
19 3/8 X 25 3/16
C04 inch 19 1/2 X 36 7/16
1/8" X 1/4"
19 3/8 X 36 3/16
C06 inch 19 1/2 X 44 5/16
1/8" X 1/4"
19 3/8 X 44 1/16
C08 inch
19 1/2 X 53
1/8" X 1/4"
19 3/8 X 52 3/4
C12 inch 19 1/2 X 68 13/16
1/8" X 1/4"
19 3/8 X 68 9/16
D26 inch 21 1/4 X 21 1/2
1/8" X 1/4"
21 3/16 X 21 1/4
1/8" X 1/4"
21 3/16 X 44 1/16 D06 inch 21 1/4 X 44 5/16
1/8" X 1/4"
28 7/16 X 28 5/16 M02 inch 28 5/8 X 28 9/16
1/8" X 1/4"
28 7/16 X 36 3/16 M04 inch 28 5/8 X 36 7/16
1/8" X 1/4"
28 7/16 X 44 1/16 M06 inch 28 5/8 X 44 5/16
28 5/8 X 53
1/8" X 1/4"
28 7/16 X 52 3/4 M08 inch
S01 inch 42 3/4 X 25 7/16
1/8" X 1/4"
42 5/8 X 25 3/16
S06 inch 42 3/4 X 44 5/16
1/8" X 1/4"
42 5/8 X 44 1/16
NOTES
The finish dimension is measured from the inside edge of the finish groove.
This is not the same as the "Finished Frame " dimension.
Millimeters
VES
(Old)
056
101
104
106
108
112
150
156
302
304
306
308
601
606
Finish Dimension
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
334 X 1118.6
492 X 638.6
492 X 918.6
492 X 1118.6
492 X 1338.6
492 X 1740.6
537 X 539.6
537 X 1118.6
722 X 718.6
722 X 918.6
722 X 1118.6
722 X 1338.6
1082 X 638.6
1082 X 1118.6
A21
(Old)
A06
C01
C04
C06
C08
C12
D26
D06
M02
M04
M06
M08
S01
S06
Finish Dimension
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
336.7 X 1124.7
495.7 X 644.7
495.7 X 924.7
495.7 X 1124.7
495.7 X 1344.7
495.7 X 1746.7
539.7 X 544.7
539.7 X 1124.7
725.7 X 724.7
725.7 X 924.7
725.7 X 1124.7
725.7 X 1344.7
1085.7 X 644.7
1085.7 X 1124.7
A21 finished opening larger by:
2.7
3.7
3.7
3.7
3.7
3.7
2.7
2.7
3.7
3.7
3.7
3.7
3.7
3.7
X
X
X
X
X
X
X
X
X
X
X
X
X
X
6.10 mm
6.10 mm
6.10 mm
6.10 mm
6.10 mm
6.10 mm
6.10 mm
6.10 mm
6.10 mm
6.10 mm
6.10 mm
6.10 mm
6.10 mm
6.10 mm
Replacing a VES(old) skylight with an A21(new) skylight
Possible retrofit application for
½” drywall installed
perpendicular and correctly to an
existing VELUX skylight
In some cases the top piece of
drywall can be trimmed to the
height of the roof deck.
Fit the bottom drywall groove
over th
the bottom
b tt
piece
i
off existing
i ti
drywall and carefully lower while
trying to get the sides to fit over
the existing drywall.
Gap.
Fill top gap between skylight
frame and existing drywall with
painters caulk. Use the painters
caulk
lk on the
th other
th three
th
sides
id if
needed.
NOTE: This is only an example. Different layouts,
angles and finish materials will affect the fit of the
new skylight.
Drywall groove comparison