Frequently Asked Questions

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

Top tip: Why not add the Ultrasky Flat Skylight waterproof kerb to your basket ? This provides flexibility on site as the kerb and skylight can be installed together before the roof covering.

Ultrasky Flat Skylight kerb can be supplied as an extra to your order.Supplied in one piece at the required 4° pitch, so no on site cutting is required.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 (£50 additional charge)

The thermal break or thermal barrier is part of 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.

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%:

• 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 a range of standard and special colours to help match or contrast your doors and windows.

Standard colours:

Any RAL or Special Colour Bespoke Colours:

Top tip: Bespoke colours may have longer lead-times; always check with your supplier.

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 Toughened Opti Neutral

Cavity: 16mm Argon Filled

Inner: 4mm or 6mm Toughened High Performance Low E

Manufactured & kite marked to BS EN 1279-2.

Toughened to BS EN 12150-1

Noise reduction: 34dB

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.

We only work off EXTERNAL “Kerb” sizes, so please make sure you measure to the external face of the timber (not supplied, recommended to be 150mm high x minimum of 70mm wide).

Simply click on the size you want on the product page for an instant price, we bespoke manufacture all Lantern sizes so if you choose a size for example of 1450mm x 1950mm then you will be charged for the correct price bracket, which will be rounded down so 1250mm x 1750mm.

Our payment terms for normal orders are strictly pro forma using Visa or Mastercard (this not only insures the product and your risk but also gives you up to 60 days free credit dependent on which card you have) or Bank Transfer, or online via WorldPay.

Bespoke products are usually delivered within 10 working days to site, this can be improved upon by a few days if you collect the skylight yourself from our Leicester factory.

Yes, if you would like to collect from our Leicester factory, provided you tell us this when you order we can book this in and confirm a slightly faster finish date for the skylight to be ready.

Yes, they are fixed at a 25° pitch all round, this pitch is for the easy clean glass coating to work on the external surface of the glass. This is also the angle for structural integrity preventing any snow loading and allowing the water to run off. This angle also gives the best aesthetics for this design of product giving the feel of improved volume from the inside.

Yes, please contact the office to check your area is covered.

Currently the maximum size we can manufacture using the product is 4000mm x 5850mm.