Aluminum thermally broken Curb Mounted (ATCM-P) – Operable Manual spindle Pyramid.

This model consists of a durable, weather resistant, extruded aluminum retaining frame and an extruded thermally broken aluminum heliarc welded base frame. The aluminum base frame is thermally broken, preventing the passage of cold air from the exterior to the interior light shaft. This model is typically used for larger skylights that require additional strength and rigidity.

The ATCM-P operable skylight is hinged directly to the curb and does not include a two part sash and base. The entire skylight lifts off the curb and is sealed to the curb with a high density foam gasket when closed. This skylight does not include a screen and is primarily used for venting commercial applications.

The Columbia aluminum thermally broken curb mounted skylight is designed to work on any height curb with a nominal 2” width.

Operating mechanism»

Wide range of glazing options in both acrylic and polycarbonate»

Suitable for all flat or sloped roof applications.»

Standard sizes include a full range of models for homes designed with 16” and 24” on centre rafters or trusses.»

Any size skylight available»

Exterior frame finishes – four standard colours»

Large capacity four sided condensation channel»


  • The ATCM-P spindle skylight is easily opened and closed manually with included telescoping 4-6’ pole. Longer poles are available.
  • Crank handle is optional

a. Acrylic

  • Clear
  • Bronze
  • White

All above available in single, double, or triple glazed.

b. Polycarbonate

  • Clear
  • Bronze
  • White

All above available in single, double, or triple glazed.

See Glazing section for additional information.

  • Acrylic – Installs on flat or sloped roofs
  • Polycarbonate – Installs on flat or sloped roofs.

See Roof types and slopes section for additional information.

See Why Skylights – What Size section for additional information.

  • Acrylic and polycarbonate available in 11 standard sizes from 16”x16” to 96”x96”.
  • Any custom size in glass or acrylic also available. Example – inside curb rough opening 67¾” x 67¾”.

  • Standard frame colour – Rideau Brown.
  • Optional frame colours – Black, White, Sandalwood
  • Custom coloured frames also available

  • Weep holes in all four corners to allow any condensation build up to drain to the outside roof
  • Allows for multi directional installation of skylight
  • Eliminates water stains on your interior light shaft

  • Comprehensive 20 year warranty on insulated glass, and 10 years on the skylight

See Warranty section for additional information.