Low-Profile Barrel Vault Rooflights

The typical low-profile barrel vault is an elegant low rise arc spanning between supporting structures. The normal geometry for low rise is usually stated as the radius of the arch being equal to the span of the arch, although other geometries are also possible.

  • Can be glazed in a range of polycarbonate options - from solid single skin for canopies and unheated spaces, to multi-wall structured giving exceptional thermal performance for Part ‘L’ compliance.
  • Finished in powder white as standard, other options available on request.
  • Metal parts can also be colour coated with polyester powders, PVF2 or anodised.

Ends can be finished off with vertical glazed screens or simply abut an adjoining structure.

The spanning performance quoted assumes the rooflight is constructed with a standard low-profile geometry and is self supporting; much larger spans can be achieved although a substructure for additional support would then be required.


Maximum Spans Up to 10.0m (self supporting).
Length Infinite length.
Loading Designed in accordance with CP3 Chapter V Part 2:1972
BS 6399:Part 1 and Part 3 1984 max. 1.5 kPa wind and 0.75 kPa imposed.
Safety ACR[M]001:2005 Class B option available.
Glazing Options Glazing in glass or structured and solid polycarbonate.
Thermal Performance Part L: below 2.0 W/m2K options available.
Fire Regulations BS 476 Part7:class1(1991) Class ‘0’ Tp(a).
Surface Finish Mill finish, polyester powder, PVF2 and anodised.

How to specify Xtralite rooflights

If you would like to specify exactly which configuration you require, click on the following to go to the specification guide:

Go to specification guide

To find a full range of PDF and CAD drawings for the Xtralite range, click on the following to go to the downloads section:

Go to downloads section