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View our handy guide on how to measure your Flat Skylight.
Buy your UltraSky Flat Skylight

Order Your Flat Skylight Now

Slope: mm

Span: mm

Glass Size: 26mm

* Clear glass has a special coating giving a slight tint.

Price: £0 (ex. VAT + Delivery)

Total Price: £0
(inc. VAT and Delivery)

The Ultrasky Aluminium Flat Skylight provides an element of style to extension and orangery roofs by flooding natural light into previously dark gloomy rooms.

Its distinctive sleek, frameless edge to edge glass gives a stunning contemporary look that complements the style of the roof and allows the largest possible amount of light into the room.

Ultrasky Flat Skylight looks frameless from the inside, giving a bright open room feel. The fully insulated aluminium frame with ‘Warm Frame’ technology and high performance noise reducing glass* means the flat skylight blocks out noise from the outside and is unrivalled in thermal efficiency.


Select the custom size that you require either from the bespoke tool or the presets above. Depending on the size parameters that you select, the price for your flat skylight will immediately be displayed.

We can usually deliver our Flat Skylights within 10 working days directly to site for a standard size and colour.

Flat skylights are delivered as a complete unit.

There may be an additional delivery charge based on non-mainland UK locations. In the event that your order incurs additional charges, you will be contacted by our Customer Service Team at the point your order is being processed.

How do I measure for the Ultrasky Flat Skylight?

Please note all dimensions are to internal face of 70 mm kerb (exclude plasterboard).

Measurement size of kerb height needs to be minimal 150mm (internal aperture).

Slope / width is always the smallest size.

How to Measure a Flat Skylight

 Ultrasky Flat Skylight glass specification:

  • Overall: 26mm or 28mm
  • Outer: 6mm Clear Tough Low E
  • Cavity: 16mm Argon Filled
  • Inner: 4mm or 6mm Clear Tough Low E (inner panes must be laminated in applications more than 5m above floor level**).
  • Manufactured & kite marked to BS EN 1279-2.
  • Toughened to BS EN 12150-1
  • Noise reduction: 34dB
  • U-Value: 1.0

Self cleaning glass can only be applied to windows with a 10 degree angle or above, as the flat skylights are of a 4 degree angle, self cleaning glass is not needed.

Clear Glass

Clear Glass

Blue Glass

Blue Glass

Simple and Fast to Fit with a High Quality Contemporary Finish

  • Distinctive frameless glass and slim aluminium surrounds give the Ultrasky Flat Skylight a stunning contemporary look.
  • Ultrasky Flat Skylight's frameless glass maximises light into the room below. The fully insulated click- fit frame provides both thermal efficiency and an easy installation.
  • Fully insulated frame with 'Warm Frame' Technology means the Skylight has a u-value of 1.2.
  • The simple click-fit frame means no fiddly trims and a fast precision fit, every time.
  • A combination of 4mm and 6mm stepped units delivers up to 34dB noise reduction making the room nice and quiet.

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  • 1 Edge to Edge glass for a contemporary look
  • 2 Fineline plasterboard trim for a neat internal finish
  • 3 Slim aluminium surround blends seamlessly with glass
  • 4 Fully insulated frame with Warm Frame technology
  • 5 Click-fit clips for quick fitting first time, every time
  • 6 Noise reducing glass reduces noise by up to 34db
  • 7 Double seal gasket with high compression, so seal won't degrade over time

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Ultrasky flat roof section








Ultrasky Flat Skylight FAQ's

Ultrasky Flat Skylight's frameless glass maximises light into the room below. The fully insulated click-fit frame provides both thermal efficiency and an easy installation

A thermal break or thermal barrier is an element of low thermal conductivity placed in an assembly to reduce or prevent the flow of thermal energy between conductive materials.

The Ultrasky Flat Skylight has a fully insulated uPVC frame which sits inside an aluminium surround, meaning that it not only acts as a thermal break but also offers superior thermal efficiency.

Ultrasky Flat Skylight is available in the below sizes as well as between sizes. For example: 1238mm x 2435mm.

Span (Internal Size)
(Internal Size)
  600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 2400 2500

Minimum size: 600 x 600 - Maximum sizes: 1200 x 2500, 1300 x 2200 & 1400 x 2000

Top tip: Please see ‘How do I measure for the Ultrasky Flat Skylight?’ to ensure you measure correctly.

Ultrasky Flat Skylight is available in a number of sizes in standard black RAL9005 - 60% and grey RAL7016 - 30% : -

  • 600mm x 600mm
  • 1000mm x 1000mm
  • 1000mm x 1500mm
  • 1000mm x 2000mm
  • 1200mm x 1200mm

Top tip: Please see ‘How do I measure for the Ultrasky Flat Skylight?’ to ensure you measure correctly.

Ultrasky Flat Skylight’s must be installed at a pitch of 4°, this will ensure water will run off the glass and stop pooling of water which can cause mould.


Top tip: The Ultrasky Flat Skylight is not available with self-cleaning glass as this type of glazing does not work effectively at angles less than 10°.

Ultrasky Flat Skylight comes in Black or Grey.

Standard colours:

60% Gloss

30% Gloss

The U-value of a product measures how effective its insulation properties are. The lower the U-value the better insulated the product is.

All sizes of the Ultrasky Flat Skylight currently exceed Building Regulation requirements.

G-value (sometimes also called a Solar Factor or Total Solar Energy Transmittance) is the coefficient commonly used in Europe to measure the solar energy transmittance of windows. A g-value of 1.0 represents full transmittance of all solar radiation while 0.0 represents a window with no solar energy transmittance (the lower the g-value the better).


The Ultrasky Flat Skylight’s G-value is 0.5 which is similar to most solar control glazing.

Currently the Ultrasky Flat Skylight is only available as a fixed product.


Top tip: For an opening option why not consider the Ultrasky Lantern with roof vents.

The Ultrasky Flat Skylight comes with a 10 year manufacturer’s guarantee.

The ‘click-fit’ technology of the Ultrasky Flat Skylight means that fitting times can be as quick as 10 minutes by a professional with the correct tools.

Ultrasky Flat Skylight weighs 33kg/m2 (based on the internal sizes).

Ultrasky Flat Skylight can be fit at heights up to 13m above floor level when the overall glazing area is 3m2 or less. For glazing areas greater than 3m2 the maximum fitting height is 5m above floor level.

Self cleaning glass is only available on glass options with a 10 degree angle or above. As Flat Skylights are 4 degrees, this means self cleaning glass is not needed.

The Ultrasky Flat Skylight is designed to meet current British Standards for overhead glass installed less than 5m above the finished floor level (it is not designed to be walked on). British Standards state that inner panes on overhead glass units must be laminated in applications over 5m above floor level (increased to 13m in limited circumstances) or are located over a body of water (such as swimming pools).

The use of toughened inner glass panes in other applications below 5m above the finished floor level is permitted in British Standards, although a risk assessment should be carried out and confirmation provided that this does not present additional risk to those below the rooflight.

Ultrasky Brochures

Roof Lantern Brochure

Flat Skylight Brochure

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