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CoVid 19 - Update

Following the Government announcement of lockdown 2.0, the factory will remain open as part of the construction and manufacturing industry.

We will continue to follow strict safety measures to ensure our colleagues and customers are COVID safe and secure.

We have a team available to process orders and answer any technical queries on: or 01200 452246.

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UltraSky 0.6m x 1.5m Black Flat Skylight Clear Glass order online

View our handy guide on how to measure your Flat Skylight.
UltraSky 0.6m x 1.5m Black Flat Skylight Clear Glass order online

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.

How do I measure for the Ultrasky Flat Skylight and waterproof kerb?

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

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. Kerbs are delivered separately.

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.

Ultrasky Flat Skylight glass is currently available with a clear standard glazing. Blue tint option coming soon…

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
  • Manufactured & kite marked to BS EN 1279-2.
  • Toughened to BS EN 12150-1
  • Noise reduction: 34dB

Glass U-value: 1.0


Did you know, self cleaning glass can only be applied to windows with a 10 degree angle or above. Therefore as the flat skylight windows 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.
  • Optional waterproof kerb provides flexibility at site as the kerb and skylight can be installed at the same time before the roof covering.
  • 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
  • 8 Fully insulated PVC kerb

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Ultrasky flat roof section









Flat Skylight Kerb Option

The optional kerb is factory assembled and delivered in one piece to minimise time on site. The kerb has a chambered construction for superior thermal performance and rigidity and contains self aligning internal reinforcement to attach the flat skylight for a faster fit.

The kerb is welded to be watertight so you can fit the skylight and waterproof the roof at a later date.

It's optimal 4 degree pitch has been set for:

  • Compliance with Building Regulations.
  • Prevention of puddles forming, which can stain or mark the glazing.
  • Ensuring maximum ‘flex', or weight-bearing capability, is accounted for.

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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

Ultrasky Flat Skylight kerb is supplied in one piece at the required 4° pitch meaning no cutting is needed on site. Made from black uPVC it comes fully reinforced and its chambered design gives superior insulating properties. The kerb’s watertight welded frame means you can install the Skylight and add your roof covering later.

Top tip: The kerb can be delivered to site before the Skylight if required for a small charge.

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 fit 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.


Building Regulation Part L relates to limiting heat gain and loss (u-Value compliant). In order to be compliant U-values must be no greater than 1.6 W/M2k in England and 1.4 W/M2k in Scotland.


Ultrasky Flat Skylight's fully insulated frame with 'Warm Frame' Technology and low-E High performance glass with a U-value of 1.0W/M2k means the Skylight has an overall u-value of 1.2 W/M2k, making it compliant with building regulations in England and Scotland.


Top tip: Always check the overall U-value of the skylight/roof light product, not just the glazing element.

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 kerb weighs 4.54kg/lm (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.

Ultrasky Flat Skylight’s kerb is compatible with the below roof coverings and maximum roof covering thickness.

Roof Covering


Top Tip: Always consult the Ultrasky Flat Skylight installation guide for further information.

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.

Ultrasky Brochures

Roof Lantern Brochure

Flat Skylight Brochure

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26th February 2020

If you want to add daylight into an orangery or flat roof extension, adding lantern roofs is a great way to do this. Lantern roofs are modern, great value for money and fast and easy to fit.

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