FCM flat roof skylight

Suitable for flat roofs, the brilliantly simple FCM Skylight is a cost effective way to provide natural daylight to buildings with flat roofs. The High Performance double glazing provides excellent thermal insulation and has been tested for hail resistance.

Product features:

  • Laminated glass will not fade or discolour over time - unlike acrylic or polycarbonate.
  • Available in 12 sizes
  • Maintenance-free anodized heavy-gauge aluminium frame withstands the extremes of the Australian climate.
  • Versatile product that can be used on roofs between 0-60° in pitch*
  • Can be used in portrait, landscape or even “diamond shape” orientation**
  • High Performance double glazing as standard – blocks approx 70% of radiant heat and gives 99% protection from UV rays
  • Requires custom-made flashing (not supplied). See download of flashing suggestion below or contact VELUX for more information.
  • 10 year guarantee.
  • High Performance double glazing as standard; with NEAT™ coating to reduce cleaning frequency.

Ideal replacements for old acrylic domes

  • Superior product for a similar price.
  • High Performance glazing: Laminated inner pane, toughened outer pane.
  • 3 skylight sizes can be used as direct replacements# for standard 400x800mm, 600x800mm and 900x900mm domes.

From $331 incl. GST

Technical Performance

flat roof skylight pitch
VELUX Skylight FCM model sizes
U-value †

Solar Heat Gain
Co-efficient †

Hailstone Test

WERS max 5 stars
(summer rating)
Skylight 2.9‡
Glass only 1.93
Skylight 0.28
Glass only 0.28
BAL40 VELUX Simulated Tests
ASTM E822-2009
AS4285, AS1288
AS3959^, AS1530.1

NB: VELUX recommends FCM is installed with a slight pitch (e.g. 3°-5°) to help prevent condensation build-up and water ponding on the glass. **FCM 2270 not recommended for “landscape” orientation. #Custom made collar adapter (not supplied) is required to fit. U-value (W/m2K) and SHGC data based on AFRC simulations, (FCM complete skylight: size 1275mm x 1275mm). ^Skylight only. Custom-made flashing required. Roof pitch 0°-60°. 
FCM Cross Section

‡FCM must be installed with insulation and Gyprock, as shown (typical installation), to achieve 2.9 U-value rating.

  1. Inner glass dimension
  2. Gyprock
  3. Timber Curb/Hob
  4. Flashing
  5. Insulation/underlay
  6. Overall throat dimension