X-One Rooflight

This latest range from Xtralite represents the future of rooflights, with an exceptionally low Ud value of 1.3 exceeding the requirements of Part L. The X-One also benefits from low air leakage rates. Unlike other rooflights, the X-One rooflight is designed and constructed in three distinct zones to clarify specification and maximize performance and flexibility.

Glazing Zone

The X-One is triple glazed as standard and formed from enhanced UV protected polycarbonate with breathing airspaces between the glazing elements. The integral cascade water management system ensures that moisture drains to the outside of the building.

Glass can be offered in lieu of polycarbonate. Double glazed insulated glass units will provide a low
Ud value alternative. Selection of high specification glass can also be used to reduce such
things as solar gain and rain noise whilst retaining non-fragile status. Contact Xtralite to
discuss your requirements.

Ventilation Zone

This feature is the key element that ensures compliance with Part L and gives X-One its unique capability in terms of environmental control. The frame is constructed from a single, highly complex, PVC profile designed to efficiently ‘dock’ between the glazing module and either the kerb adaptor profile or the kerb, creating a secure, weathered and warm connection with no cold bridges.

The ventilation zone arrangement is flexible depending on the specifiers Requirements. For example it can include the following features:

  • A unique continuous hinge is available which facilitates the opening of the ventilation zone and glazing (manually or electrically actuated). This allows for high-volume air ventilation.
  • A PVC extruded profile rotary ventilator system can be mounted in the sidewall of the accessory frame. The cylindrical shape protects it from the outside elements using a continuous cowl feature and can be protected with integral insect mesh. The design of the vent ensures that there is no cold bridging between the outer and inner surfaces. When the vent is closed it forms a virtual triple skin chamber with both air leakage and sound attenuation performance second to none. The ventilation system is simply operated by rotating the operating handle. Refer to the Rotary Vent drawing in the Ventilation and Roof Attachment section for more information.

Attachment Zone

Xtralite has developed unique mounting systems to aid attachment and make the process of incorporation easy.

A versatile metal foot will allow for varying thicknesses of roof insulation, whilst allowing ‘flexible’ matching of rooflight to roof opening as well as ‘cut to falls’ variable depth insulation systems. Fixing direct to the roof deck allows for the kerb to be attached direct to the supporting structure which could be above the insulation layer or by using a kerb adaptor direct to any pre-constructed builders kerb.

The kerb has three main insulating chambers ensuring not only compliance with current regulations but also with projected future changes, by the addition of high performance insulation to the chambers. The kerb is designed to be equally suitable for, and compatible with, both polymeric and PVC roofing membrane systems, bituminous membrane and mastic asphalt systems (Contact Xtralite for suitable bonding agents).

The rooflight assembly includes a unique termination detail to ensure that the ‘top edge’ of the roofing membrane is fully protected. A special ‘key’ finish to the PVC-U kerb increases roof membrane fixing options and the PVC-U kerb is torchon system friendly. Simplified assembly allows the roofing finish to be applied to the upstand prior to clipping the glazing zone and ventilation zone into position. This procedure minimises damage and the need for protection, and eliminates dressing around the vents.

Thermal Efficiency Ud Value 1.3
Shape Pyramid
Glazing Colours Clear
Glazing Material Polycarbonate Single
Glass Single
Ventilation Rotary Vent
Hit and Miss Vent
Manual Wormgear Vent
Linear Motor Vent
Gas Spring Vent
Permanent Vent
Controlled Louvre Vent
Security Security Screws
Security Frame
Intruder Grid
Kerbs PVC
Roof Attachment Flexible Metal Roof
Insulated Metal Foot
Direct to Roof Deck
Adaptor Kerb

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