Skylight Installation Instructions Skylight Installation Instructions

  • First decide approximately where you would like your skylight located in your home.


  • Check that the attic space is clear of obstructions above where you wish to locate the skylight.


  • Measure to the center (between joists) and tap a small nail through the ceiling from the top. Then check that you have the correct position for your skylight from the inside of the room.


  • Using the up-stand of the ceiling frame as a template, mark the ceiling with a pencil, ensuring that the small nail hole is at the center. (See figure 1)



  • On the ceiling, cut along the pencil line with a key hole saw (see figure 2). Remove and save cutout for step #9.


  • Insert the ceiling frame and attach it with the 1 1/2" screw and plastic lugs provided. The plastic lugs are placed on the top side of the ceiling, fasten the screws through the holes in the ceiling frame, through the ceiling and into the plastic lugs and tighten. Finish off with the plastic caps into the screw heads. (See figure 3)


  • From the attic, choose the most direct route for the tubing to reach the roof, keeping in mind that tube must fit between the best rafters. (Note: Also consider that the skylights work best with southern exposure and that the shorter, straighter, and tighter the tube is, the better the performance. Skylights with tube lengths in excess of ten feet are not recommended.)


  • Measure the center between the appropriate rafters and tap a nail through the roof from underneath. Note: Make sure there is a clear area of roof above your desired location.


  • Using the ceiling cutout (from step #5) as a template, mark a circle on the roof surface around the base of the cutout. Be sure that the that the nail hole is at the center of the desired area.


  • Using a reciprocating or jig saw, cut around the circle and remove the section of unwanted roof material and sheathing. (See figure 4)


  • Attach the tubing to the skylight top frame by pulling the tube over the stainless steel ring on the underside of the sky light frame. The four stainless steel tabs should be bent out ward through the flexible tubing, and bent into a hook shape to hold the wire. Be sure that two or three strands of the wire skeleton of the tubing are above the tabs. Wrap around the junction of the skylight and the flexi-tube three times with the P.V.C. tape provided. Be sure to cover the tabs completely.


  • Measure down from the top of the roof surface to the top of the ceiling to establish the length of the flexi-tube required. Remember to allow extra for bends and angles in the tube.


  • Stretch the flexi-tube out and cut to the required length using a Stanley knife and wire cutters.


  • Pull the loose end of the flexi-tube over the stainless steel lower ring and attach it with the P.V.C. tape wrapped two or three times around the outside.


  • With the tubing and lower ring attached to the underside of the skylight, slide the base into position of the roof. Ensure that the upper portion of the sheet metal flashing is underneath both the existing roof material and the underlying (felt). The lower portion of the sheet metal flashing should be on top of the existing roof surface and fastened in a similar manner to normal flashing requirements for the appropriate roof type. Note: Re-install any pieces of the roofing material to cover the side flashing removed during installation. (See figure 5)


  • Install vent and/or blank tabs into the top frame and secure the dome with the four brass screws provided.


  • From inside the room, reach through the ceiling hole and pull the stainless steel lower ring down into the ceiling frame. Attach it with the four sheet metal screws provided. (See figure 6)


  • Install the prismatic diffuser. Diffuser may be flexed slightly to pass through ceiling opening and rest on top side of ceiling frame. Note: Prismatic side face down.

Note: Be sure to remove the plastic protective film from the inside surface of both the upper and lower stainless rings.

Mechanical Specifications

Component and Description for Mechanical Evaluations

  1. Transparent U.V. stabilized grade 1 acrylic dome; I.C.B.O. #1084.
  2. Dome fixed with 4 non-corrosive screws.
  3. Vent tabs, (vented or solid) interchangeable.
  4. Luran S KR2854 black skylight base, ASTM tested; D638, D256, D792, D648.
  5. Base attachment (500-9 screws and 400-6 screws). Two continuous caulking beads seal frame to roof flashing base.
  6. 26 G.A. pre-painted colorbond flat metal flashing. Available in pre-bent form to take lead strip for tile roofs.
  7. Mirror-finish stainless steel ring, 28-gauge with four bendable tabs for tubing attachment.
  8. Three continuous wraps of PVC duct tape.
  9. Highly reflective, ultraviolet-proof quadruple laminate. It consists of a double outer- layer of metallized polyester film with a double inner layer of reinforced glass fiber filament. A yarn mesh aluminum foil with coiled-spring wire skeleton is imbedded between the two layers. UL 181 rated.
  10. 28-gauge mirror-finish stainless steel ring.
  11. Four sheet metal screws attach stainless steel ring to ceiling frame.
  12. White ABS injection molded ceiling frame.
  13. K-12 prismatic acrylic diffusion panel.
  14. Screws attach ring to ceiling with retainer blocks. Screw cover also attaches (500-6 and 400-4).

*We recommend that you check with your local building department. Some local codes may specify additional glazing requirements over those required by uniform building codes. Please feel free to contact us with your local codes, should there be another model with optional features needed, which can be special ordered.

Courtesy of Suntunnel Skylights

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