Air Vent Inc. Radiant Skylight Tube Installation Instructions

							© Copyright 2014 Air Vent, Inc. Radiant Skylight Tube C01 ver 3 
						

							fig. 4fig. 5
Step 3 -  Preparing and 
Installing the Ceiling Frame
Take the two halves of the ceiling lens (fig. 6) 
and slide the connectors in place on both 
ends of each ring (fig. 7a and 7b). Insert the Ceiling Frame and attach with the included 
2” Ceiling Frame Screws and plastic lugs. The plastic lugs are placed on the top side of 
the ceiling. Fasten the screws through the holes in the ceiling frame, the ceiling and into 
the white plastic lugs and tighten. (fig. 8a and 8b)  
 
Step 4 -  Cutting the roof opening
From inside the attic, locate the desired position for the flashing and dome opening. Generally, directly above the ceiling 
opening is optimal but this position can vary depending on your particular attic conditions - keep bends to a minimum and do not 
bend more than a 45o angle. Start by measuring the distance between the 2 rafters and mark the center location. (fig. 9) You 
should have a minimum distance between them to allow for a 14.5” hole to be cut. Drive the 2” deck screw through so that it 
shows on the outside roof surface. (fig. 10 and 11)    
 
fig. 9 fig. 10fig. 11
Step 2 -  Cutting out the ceiling hole
Use the included template (included in the Ceiling Parts Box) for 
marking 
the ceiling hole; or simply use the ceiling frame as a 
template and draw the hole to be cut.
Begin cutting the circle with a drywall saw  (fig. 4) as you get to 
the end of the cut, hold on to the wire or nail to brace the material 
for removal. (fig. 5)  
 
    
fig. 6
fig. 7a fig. 7b
fig. 8a fig. 8b
Step 1 - Location of the diffuser  
Determine where you wish to install the SkylightTube (fig. 1)  
and from inside the attic, clear out the insulation in the 
desired location, center a nail or piece of wire between the 
ceiling joists and through the drywall so it is visible from the 
ceiling below. (fig. 2) If using wire, put a 90 degree bend in 
the wire so it won’t drop through. (fig. 3)
 
Alternately, you can drive a nail up into the ceiling where 
you wish to locate the ceiling lens and find the location 
in the attic. Then find the closest center between rafters.
Desired location
fig. 1fig. 2
fig. 3 
						

							Step 5 -  Dome Installation 
Preparation
Drop the flex tube into the roof opening (fig. 17) then 
set the flashing assembly into position and make a 
note of the outer footprint or mark with chalk. (fig. 18)
fig. 17 fig. 18
Step 6 -  Remove the surrounding shingles 
Once you know the outline of the flashing, remove the surrounding shingles with a pry bar
. (fig. 19) Composition asphalt shingles 
can be installed in various sizes depending on your roof configuration so it is recommended that you remove the entire piece as 
you find it in the footprint of the Skylight Tube flashing (fig. 20)  Make sure you remove enough shingles to allow the upper 2/3rds 
of the flashing to make direct contact with the sheathing and roof underlayment (fig. 21)  Save all of the pieces you remove for 
 
re-installation later.
fig. 19 fig. 20fig. 21
From on the roof, measure 7.25”, (fig. 12) repeat this at 90 and 45 degree angles to achieve a 
circular pattern (or use provided template as in Step 2). Then draw in the pattern with chalk. 
(fig. 
13)  Using a 1/2” drill bit, drill a pilot hole on the edge of the circl\
e to fit the saw blade for cut
-
ting. (fig. 14) Start cutting the circle with a reciprocating saw, as you reach the end of the cut  
secure the material by holding onto the exposed screw so it won’t fall into the attic space (fig. 
15) Remove the disk of material and discard (fig. 16)
 
fig. 12
fig. 13 fig. 14fig. 15
fig. 16 
						

							Step 8 -  Replace the shingles  
Use a framing square to cut the replacement shingles to size. (fig. 27)  Generally, you will want to reinstall each row so that they  
overlap the flashing up to 5 1/2 inches from the outer edge of the flashing as shown in (fig. 28)  Trim excess material from 
shingles so they can fit around with the same 5 1/2 inch overlay. (fig. 29) Use roofing nails and asphalt roofing cement to re-attach 
the shingles.  For ideal fit and finish, we recommend covering the flashing with shingles leaving only the bottom center area of 
the flashing exposed as shown. (fig. 30)
fig. 27fig. 28fig. 29
fig. 30
fig. 31 fig. 32
fig. 33
Step 9 -  Secure the flex tube to the ceiling frame  
Reach through the ceiling frame and pull the flex tube through the ceiling frame and into the room. Continue pulling until it is 
tight, the wires will lock onto the lip at the top of the ceiling frame. Cut the flex tube off level with the bottom of the ceiling 
frame. (fig. 31) 
Fit the white plastic flex tube locking ring into position with the provided countersunk screws. Start at one end and work your 
way around the locking ring. Be sure to line up the recesses in the flex tube locking ring with the recesses in the ceiling frame to 
ensure the flex tube and locking ring are not overhanging the ceiling frame lip. (fig. 32) 
Snap the ceiling lens onto the ceiling frame. (fig. 33) 
fig. 22
Step 7 -  Install the flashing assembly  
When you are ready to install the flashing assembly, first apply a bead of asphalt roofing cement 
to the underside of the flashing base. (fig. 22)  Re-install the flex tube into the roof opening and 
carefully place the top of the flashing underneath the top-most row of shingles. (fig. 23)  Line up 
the bottom of the flashing with the shingle line and drive a screw into the center hole on the bot
-
tom as shown in (fig. 24)  This will allow you to fine tune the angle if necessary. Use standard 
1.5” roofing nails or screws (not included) to secure the flashing in place (fig. 25)  There are 7 posi
-
tions as shown in (fig. 26)   
fig. 23 fig. 24 fig. 25
fig. 26 
						

							1. Roof Parts
 
1.    Metal Flashing
2.   Clear Acrylic Dome
Flexible Tube
 
3.    72” Flexible Tube pre-attached to Roof dome
4.    Snap Ring
5.    Aluminum  Foil Tape
3. Ceiling Parts
 
6.   Ceiling Frame
7.    Ceiling Lens
8.    Included Hardware
    A. Ceiling Frame Screws 
    B. Plastic Lugs
    C. Screw Caps
Parts List
Tel: 877-50-USSUN
www.ussunlight.com
[email protected]
Roof Dome
TM