Manufacturers of
Rooflights, Structural Glazing,
Canopies & Walkways

Barrel Vault

Naturalight have developed a sleek glazing bar system available in a range of sizes to suit all requirements. The Structural barrel vault rooflight is cost effective and is the ideal rooflight for spanning large areas. The system has the ability to be glazed with solid sheet or structural polycarbonate to suit architect requirements and project budget.  The unit can also be provided in a range of glazing bar colours making the system suitable for professional environments as well as schools and private homes. Various ventilation methods are also available including manual and electric options.

Glazing Options

Polycarbonate glazing is offered in 3 different colour tints of clear, opal or bronze.

Polycarbonate options are:

  • 16mm multi-wall structural polycarbonate
  • 25mm multi-wall structural polycarbonate
  • Factory assembled double or triple skin cassettes manufactured from 3mm polycarbonate


Barrel Vault type rooflight to generally 30° cord height and to an infinite length dependant on glazing material, snow and wind calculation.
Designed in accordance with CP3 Chapter V Part 2:1972 BS6399: Part 1 and Part 3 1984 max. 1.5kPa wind and 0.75 kPa imposed.

Frame Material
Aluminium to BS 1474:1987 Alloy 6063-T6

Products can be manufactured to meet ACR (M) 2005:001

Glazing Option
Glazed in either structural UV protected polycarbonate or solid UV protected polycarbonate to a variety of specifications

Part L: Below 2.0 W/m³K options available

Available in mill finish or any standard RAL colour (non standard RAL colours available at an additional cost

Formed from sheet aluminium to suit specific project interface requirements.

NaturalSpan Air Permeability Test Report


NaturalSpan Technical Page

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