NBS Source
Kestrel Aluminium Flat Rooflight System


Suitable for a range of applications including homes, offices, schools and hotels.


The Kestrel Thermal Flat Top Rooflight System is suitable for most standard flat roof constructions and covering, e.g. lead, copper, zinc, sedum, rubber EPDM, asphalt, GRP fibreglass.

Available in three different designs; Fixed, Ventilation or Egress. The system has been designed to allow the glass to be removed in the event of double glazed unit failure. Using a removable PVC cassette to which the glass is bonded, it is mechanically fixed to the frame, therefore only the cassette will need replacing in the event of glass replacement.

Features and benefits:

  • Walk on glass option available.
  • Ventilation – fully concealed chain drive actuators 24v or 230v.
  • Egress – operated by gas springs and espagnolette locking system.
  • Stepped edge units used to reduce glass breakage due to thermal fracture.
  • Wide range of sizes.
  • Minimal glazing bars to maximise natural light.
  • For fixed glazing a Rafter Bar option is available for longer runs of flat glazing.
  • Factory finished fully watertight product with a high-quality elegant appeal.
  • Narrow sightlines providing a look of a frameless system from the inside.
  • Dual colour powder coating available.
  • Made to measure, bespoke service.
  • Low profile, secure, thermally efficient.
  • Easily assembled on-site, easily transportable.
  • Will accept standard Flush Glazed units

General information


Available in any RAL or BS colour.




Mill finish

Powder coated



Aluminium profiles are extruded from alloy 6060/6063 T6 complying with the recommendations of BS EN 12020-2:2008.











Ten year

Kestrel Aluminium Profiles have a ten-year warranty. See powder coating guarantee.


Pr_30_59_98_03 Aluminium frame roof window unitsPrimary


L10/46 Roof windows

L10/460 Rooflights

Specification data - Aluminium frame roof window units Enhanced data

Product performance


Fire resistance

Not fire rated.

Whole window U-value

1.17 W/m2K.



Finish as delivered



Anodized to BS 3987:1991.

Etched and anodised to BS 3987:1991. Silver AA25 or colours on request.

Mill finish.

Powder coating to BS EN 12206-1:2004.

Polyester powder coat paint.


Insert requirement. Available in any RAL or BS colour.

Glazing or infill



It is preferable that IGU's be assembled with silicone edge seal to prevent degradation from UV light. 

28.4 mm - (6 mm toughened outer, 16 mm cavity, 6.4 mm laminated inner).

30.8 mm - (8 mm toughened outer, 14 mm cavity, 8.8 mm laminated inner).

Triple glazing.

44–48 mm with varying make-ups available. Recommended triple glazing make up: 6 mm toughened/14 mm spacer/6 mm toughened/14 mm spacer/ 6.4 mm laminated inner.

Walk on glass.

44–48 mm with varying make-ups available. Consult manufacturer.




Electric actuators KAS1656 24v or 230v supply.

Operation via Rocker Switch KAS1656-RS.

Single actuator, maximum weight of vent 45 kg.

Dual actuator, maximum weight of vent 65 kg.

Gas struts gassed to variable force depending on roof vent size and weight.

Manual screw jack option available, maximum throat opening 300 mm. KAS1668-S.

Product Reference

Kestrel Flat Rooflight System


Fixed (standard).

Fixed (walk-on).


Opens up to 360 mm using fully concealed chain drive actuators.


Suitbale for any office, school or hotel that may require an

alternative means of egress for maintenance purposes. The

rooflight is designed to open up to a 70 degree angle

allowing access to the rooftop if required.

Environmental information

Country of material origin

United Kingdom

Country of product manufacture

United Kingdom


Kestrel Flat Rooflight System

Kestrel Flat Rooflight System

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