How to Install a Sun Tunnel

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Light can make any room seem brighter and more welcoming. Sometimes it is not possible or practical to install a full-sized skylight or a window. In these situations, installing a Sun Tunnel can be a good alternative. It's small size and flexible construction makes it easier to install as well as it lets in a surprising large amount of light.

Things You'll Need

  • Pencil
  • Drill
  • Wire
  • Saw
  • Screw and cordless drill
  • Trowel
  • Mastic
  • Sealant
  • Snap ring
  • Tape
  • Mark where you wish to install the Sun Tunnel. Inspect the attic to make sure there are no obstructions. Also make sure that the distance between the ceiling where you wish to install the Sun Tunnel is not more than eight feet.

  • Drill a hole in the ceiling and extend a wire through the ceiling to mark the position in the attic.

  • Remove the parts of the ceiling ring. Detach the trim ring by rotating it.

  • Cut the hole in the ceiling with a saw. Insert the plates into the hole. Secure it in place by screwing into the joist.

  • Repeat Step 1 to mark the position of the Sun Tunnel on the roof by tracing around the flashing. Cut the hole with a saw then remove the roofing material from the upper part of the roof. Apply mastic to the raw portion of the roof.

  • Apply the flashing and the flange to the rough opening. Secure the flange to screws. Apply sealant around the flange and cover the screws. Apply underlayment to cover the flange to provide efficient and effective drainage. Install roofing material to replace the material you removed.

  • Slip the aluminum ring into the tunnel, then remove the tape that protects the ring. Secure it with screws. Put the bottom of the flexible tube into the ring in the ceiling. Secure the other end to the ring in the roof and secure it with screws.

  • Pull the tunnel down through the ceiling. Fold the flexible locking snap and insert it inside the flexible tunnel. Fold the portion of the tunnel that extends below the ceiling back inside the tunnel. Secure it with tape. Slip the diffuser into place and secure it in place by rotating it until it clicks into place. Install the ring in place by rotating it.

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