Accessories and Finishing Touches


This versatile product can be used with all Columbia curb mounted skylight models. It provides a weatherproof seal between the curb and your roof deck. It is to be used with thin roofing materials including asphalt or fiberglass shingles, cedar shingles and shakes.

  • Compatible curb mounted skylights include VCM, OVCM, ATCM, ACM and ATCM-OF models
  • Suitable for low profile roofing materials on roof pitches from 15° (3:12) – 60° (20:12)
  • 2×6 and 2×4 site-built curbs
  • Recommended Columbia IWS skylight underlayment membrane is applied between roof deck and curb, prior to installation of flashing
  • Continuous counterflashing on top of entire framed curb is suggested
  • Minimum 2” x 2” cant strip cut diagonally to a 45° angle applied to the bottom of your wood curb for flat roof installations


Choose an attractive sun-screening accessory from your neighborhood window coverings specialist, to give you extra control over light or direct sun.

  • Columbia requires any blind or sunshade installation to be a minimum 12 inches from the skylight frame. The blind must also allow for air passage from the base of the skylight through the blind into your home, thus preventing excessive heat build up between the blind and your skylight. (this point highlighted in yellow in a gray box, see top of ‘glazing options’ page)
  • Fashionable shades without any visible cords to fit any room are available in a wide range of colours. Why settle for only white?
  • Your window covering specialist has light blocking fabric blinds available to eliminate light when desired.
  • Venetian blinds are available for both vertical and overhead applications in a wide selection of colors, allowing you to adjust the volume of light and direction into your room.
  • Columbia builds skylights for your every need. We strongly suggest you seek out the advice of a window covering professional to complete your skylight installation.