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  • The FST comes as a complete kit – Dome, Roof Jack, 8’ Flexible Light Tube and choice of prismatic or translucent white diffuser.
  • The ideal solution when running a straight pipe is not possible.
  • Easily installed around attic obstructions.
  • Available in 13” size only.
  • Heavy duty black aluminum flashing.
  • Available in flat, sloped, curb mount and low profile glass models.
  • High impact acrylic U.V. stabilized dome.
  • Tubing made from flexible heavy duty aluminum duct, with 98% light reflectivity.
  • Tubing is tear, puncture and fire resistant and listed to UL2186S.
    8 ft. of flexible light tube included in kits. 12 ft. tube available for longer runs.
  • All models are standard with flat prismatic or white diffuser for sleek, modern interior finish.
  • Includes energy conservation kit – creating two additional airspaces to reduce condensation and improve energy efficiency.

Recommended Roof

Sloped Flat Flex Sun Tube Roof Type

Sloped – Asphalt Shingles or Flat Roof


Roof Pitch 0:12

Min 0 12 Roof Pitch 45 0 Feature

Suitable for low profile asphalt shingle or shake roof only.

Curb Mount Kit suitable for a membrane roof such as 2 Ply, Single Ply, Metal, Tar & Gravel & EPDM.

  • Hallways Laundry rooms
  • Kitchens
  • Closets
  • Bathrooms
  • Living Room
  • Garage
  • Work Room

The complete flexible sun tube kit includes:

Suntube kit 1

The dome is formed from crystal clear high impact acrylic – it absorbs 99% of UV rays while maintaining optic clarity.

Suntube kit 3

8 feet of flexible highly reflective light pipe – tear, puncture and fire resistant. Allowing for installer to avoid obstacles like ducting, electrical, or roof trusses.

Suntube kit 2

The roof jack (Flashing) is a heavy duty aluminum frame (powder coated black) designed to complement common roofing materials. Available for: Sloped, Flat, Curb Mount and Low Profile Glass designs.

Suntube kit 4

The light diffuser fits easily into your ceiling, and is designed with a smooth integrated, modern finish. The standard kit comes with a prismatic diffuser. A soft white diffuser is available for a less intense light.

How A Flexible Sun Tube Works

Sunlight is captured by the dome

The crystal clear low profile impact resistant, acrylic dome sits on your rooftop, collecting sunlight from sunrise to sunset. The flashing housing ensures that the unit is weathertight and leak proof.

Beautiful natural sunlight enters the room

The low profile light diffuser fits in your ceiling, and is engineered to spread the captured sunlight evenly throughout the room.

The prismatic diffuser reflects natural light in all directions – eliminating glare and “hot spots”, while the soft white diffuser provides softer illumination.

How A Flexible Sun Tube Works

Sunlight is reflected through a flexible light pipe

The sunlight travels through an ultra reflective, mirror-like flexible tube, before entering the building. Our specially designed Miro-Silver® flexible light pipe collects sunlight even when the Sun’s position is low in early morning or late afternoon.

The flexible tube helps the installer avoid obstacles like electric wiring, venting, or roof trusses – but the intensity of the light is not reduced when bent, because of the highly reflective interior surface.

The flexible sun tube works, even on cloudy days. An additional benefit, is our sun tube filters out the harmful UV rays that can endanger health and can fade clothing, furniture, and carpeting.

Benefits Of A Columbia Flexible Sun Tube

Sun Tubes Bring Healthy Sunlight Into Your Home

Columbia sun tubes operate without needing a power supply. No wiring or switches – just free light with all the positive benefits of natural lighting. The crystal clear high impact acrylic dome captures sunlight on the roof throughout daylight hours.

The elegant black powder coated aluminum flashing protects the sun tube from the elements, rain, snow, ice, and wind.


Get The Natural Sunlight You Want, Without Harmful UV Rays

The sunlight enters the clear acrylic dome and travels through a highly reflective, mirror-like Miro-Silver® rigid aluminum tube. The light bounces downward through the pipe before it enters your home. Columbia’s specially designed Miro-Silver® light pipe is able to draw in a significant amount of sunlight even when the sun is low in the sky, in early morning and late afternoon.

The Columbia sun tube works on cloudy days – though the intensity of the light is slightly diminished. Additionally, our sun tubes filter out the harmful UV rays that can be detrimental to health, and fade artwork, clothing, furniture and carpeting.

Natural Sunlight Without Unwanted Heat Gain

Columbia sun tubes operate with virtually no heat gain. As the sunlight travels through the Miro-Silver® flexible aluminum light pipe it passes through a thin, clear impact resistant acrylic lens which improves U-factor and Solar Heat Gain coefficient.


Fill Your Home With Beautiful Soft Evenly Dispersed Sunlight

The attractive low profile ceiling light and lens are designed to evenly disperse sunlight into your home.

The flat prismatic lens surface bounces the light in all directions eliminating the glare and hot spot effect of traditional skylights. Soft white diffuser also available.

Depending on the model size, our tubular skylights can illuminate the equivalent of up to 300 – 1,450 watts of electric artificial light – without adding to your energy bill!

Flexible Residential Sun Tubes Options

Only available in 13” Rough Opening diameter.
Angled Kit
Fst Angled Kit
  • Includes angled flashing: ideal for roofs with pitch between 3:12 and 5:12.
  • Angled flashing provides optimum light collection from all roof directions.
  • Constructed of commercial pure grade 1100 series aluminum without seams, black powder coated.
Flat Kit
Flexible Sun Tube 13 Inch Flat Kit
  • Designed for flat roof installations for optimum light collection.
  • Can also be used in sloped roof application for a smooth finish that runs with the roof slope.
  • Constructed of commercial pure grade 1100 series aluminum without seams, black powder coated.
Low Profile Glass Kit
Flexible Sun Tube 13 Inch Low Profile Glass Kit
  • Provides a low profile skylight that matches the roof line.
  • LoE double glazed glass unit with 2” high aluminum curb & built in flashing.
  • Black powder coated.
Curb Mount Kit
Flexible Sun Tube 13 Inch Curb Mount Kit
  • Can be used in flat or sloped applications. Site built and flashed curb required.
  • Often used with high profile roofing materials, such as metal roofing or tiles.
  • Constructed of commercial pure grade 1100 series aluminum without seams, black powder coated.

Sun Tubes lens options

Prismatic Diffuser

Prismatic flat diffuser is made of durable acrylic. The diffusers surface contains several small prisms to help spread the light evenly.

Soft White Diffuser

Soft flat white diffuser is made of durable acrylic. The diffusers surface is smooth and evenly spreads a softer tone of light.

Technical Information

Each model comes with a downloadable information package to help you select, specify, and install our product. If you do not find what you need, don’t hesitate to call our Columbia Customer Service Team at 604 437 3377 (Toll Free: 888 437 5557) or email
Suntube Installation Instructions Thumb
Use Columbia’s installation instructions to ensure a successful installation.

Download the instructions for this model, or if you need multiple models go to the Installation Instruction Library page.

Why Columbia

Columbia wins ENERGY STAR® award two years in a row

For the second year in a row Columbia Skylights was recognized by ENERGY STAR® Canada – receiving the prestigious 2022 Special Recognition Award and the 2021 Sustained Excellence award. We appreciate ENERGY STAR Canada for recognizing Columbia’s decades of focus on sustainability and our continued commitment to producing the only Canadian made energy efficient skylights that adhere to the current ENERGY STAR certification.

Columbia has been a member of the ENERGY STAR Canada program since 2007.

As Canada’s largest skylight manufacturer we want to acknowledge Natural Resources Canada and the Canadian ENERGY STAR program for highlighting our ongoing efforts across product development, glazing technology, manufacturing sustainability, and the promotion of ENERGY STAR to the Canadian consumer.


Review our FAKRO Premium European skylights, roof windows & flat roof skylights

FAKRO produces the highest quality European designed & manufactured skylights in the world, delivering exceptional performance and energy efficiency. If you want the best for your home, FAKRO skylights & roof windows are what you are looking for, with outstanding craftsmanship and finish.

Columbia is proud to be the exclusive Canadian distributor of FAKRO skylights and roof windows. For over 30 years, the FAKRO group has produced beautifully designed, technically superior skylights. All of the FAKRO skylights are produced in their European plants.

As the second largest skylight manufacturer in the world, FAKRO supplies up to 15% of the global skylight market – with over 8 million skylights sold in more than 50 countries.