Installation Guide

SIZE INFORMATION M, CMA MODELS
Fastener Schedule
Size
Code Roof Opening
Finished
Opening
(Drywall
Dimension)
Fits on
Center
Spacing
Fasteners
Per
Top
Per
Btm
Per
Side
1446 14½"x46½" 13½"x45½" 16" 2 2 4
2236 22½"x36½" 21½"x35½" 24" 3 2 3
2246 22½"x46½" 21½"x45½" 24" 3 2 4
3030 30½"x30½" 29½"x29½" 16" or 32" 3 2 3
3046 30½"x46½" 29½"x45½" 16" or 32" 3 2 4
SIZES 1446, 2236, 2246, 3030, 3046
1284 SA2- 3/12
MODEL SFA
Minimum 2:12 pitch required.
Sun-Tek Manufacturing, Inc.
10303 General Drive
Orlando, FL 32824
407 / 859-2117
www.Sun-Tek.com
[e-mail]
INSTALLATION INSTRUCTIONS
POLYDOME SERIES
You will need:
• hammer • sealant/mastic
• keyhole saw • tape measure
• skill saw • chalkline or straight edge
• nails • trowel or caulk gun
• drill • utility knife
• 2 x 4’s
For Light Tunnel:
• 8 or 10 penny nails
• plywood or drywall
RECOMMENDED SEALANTS:
• 100% Silicone
• Sealants approved for use on
polycarbonate (contact Sun-Tek
• STS 1000 (Sun-Tek exclusive) Butyl
rubber sealant/caulk
1.
Inspect skylight for damage before installing. Peel back protective plastic to inspect dome.
If skylight is damaged, do not install. Please contact your supplier for information on a
replacement.
2.
To properly position skylight between trusses/rafters, locate the roof opening from the underside
of the decking. Drill holes or drive nails to mark corners. (If this area is not accessible, locate the
ceiling joists from inside the house, mark and cut opening in ceiling, then mark roof opening.)
3.
Remove shingles 6 - 8" out from roof opening. Before cutting roof opening, check measurements
against size chart. Snap a chalkline from corner to corner, or draw line with a straightedge, then
cut roof opening.
4.
Frame roof opening using 2 x 4’s as headers - cut two 2 x 4’s to fit the actual distance between
trusses / rafters and nail into place.
a. If applicable, cut ceiling opening and build tunnel framing.
See “Light Tunnel Installation Instructions.”
5.
Shingle up to the bottom of the roof opening.
6.
Apply a ½" wide bead of caulking, set back 1" from the roof opening around the entire opening. Set a
second ½" wide bead around the entire opening, set 1" back from the first bead. Sealant applied too close
to the opening may “ooze” into the opening. Can also use 3" wide x 1/8" thick butyl tape, if compatable.
Set ½" back from opening.
7.
Set skylight over opening with the "THIS EDGE DOWN" label at the bottom of the opening. Nail into place
through the pre-drilled holes in the flange with the 1¼" galvanized ring-shanked roofing nails provided
(See Fastener Schedule). Cover the head of each nail with sealant.
8.
Shingle up sides and across the top. Place shingles as far in as possible, but be careful not to nail through
the skylight flange.
9.
The bottom flange will still be exposed: we recommend leaving it this way. However, if you decide to place a "false shingle" over it, be
careful not to nail through the flange.
10.
Interior Finishing: Run drywall (or other finishing material) up the inside face of the curb. Slip the drywall up until it bumps against the ledge
in the top of the curb.
FAILURE TO FOLLOW RECOMMENDED INSTALLATION PROCEDURES MAY VOID WARRANTY
Please read instructions completely before beginning. Deck and roong felt should already be installed.
All installation information is supplied in good faith, but without recommendation to its use. No guarantee of the results of any use of this information is to be
implied, since conditions of use are beyond our control. Please consult local building codes for compliance before installing.
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