Double Glazed Units - Sealed Units Online

3mm Clear, clear float Glass, NOT Toughenable. Used for period properties to allow a slim Double Glazed Unit for replacement of single pane glass
4mm Clear, clear float Glass, Toughenable.
6mm Clear, clear float Glass, Toughenable, generally used in larger units.
8mm Clear, clear float Glass, Toughenable, generally used in larger units.
10mm Clear, clear float Glass, Toughenable, generally used in larger units.
6.4mm Laminate, clear laminated glass, a safety glass in its own right, eliminates UV which causes furniture fade, remains in place if broken unlike toughened glass which shatters leaving a hole. Non-toughenable.
6.8mm Laminate, clear laminated glass, a safety glass in its own right, reduces noise, eliminates UV which causes furniture fade, remains in place if broken unlike toughened glass which shatters leaving a hole. Non-toughenable.
4mm Pattern, Semi-Opaque/Patterned glass generally used in bathroom windows where a level of privacy is required. Toughenable.
Self Clean Clear/Blue 4mm and 6mm - The ideal choice for situations where cleaning will be difficult or costly (e.g. high rise buildings, conservatories and roof lights), or where good visibility is important.
AntiSun Grey/Bronze 4mm and 6mm - A medium performance solar control properties, reducing solar heat entering the building, enhancing comfort and reducing the need for cooling the building
Planitherm 4S - Offers excellent solar control properties, reduced glare and enhanced thermal insulation. Planitherm 4S provides true year round comfort when used throughout the conservatory.

Toughened or tempered glass is a type of safety glass processed by controlled thermal or chemical treatments to increase its strength compared with normal annealed glass. Tempering puts the outer surfaces into compression and the inner surfaces into tension. Such stresses cause the glass, when broken, to crumble into small granular chunks instead of splintering into jagged shards as plate glass (aka: annealed glass) creates. The granular chunks are less likely to cause injury.

This symbol is displayed to show that the glass is Toughened.

This symbol is displayed to show that the glass is Not Toughened.

Where is Toughened Glass Required?

Protective Tape is used to cover the sharp edges of the glass panels. This is purely used to assist in handling and adds some protection to the delecate edges. When fitting in to timber frames using glazing tape or sealants (wet fit) then it can be an advantage to request the units to be supplied WITHOUT the protective tape. Please note that this option is only available on units with Spacer Bars of 12mm or less.

3mm Clear, clear float Glass, NOT Toughenable. Used for period properties to allow a slim Double Glazed Unit for replacement of single pane glass. Please note 3mm Glass is NOT available in Softcoat.
4mm Clear, clear float Glass, Toughenable.
6mm Clear, clear float Glass, Toughenable, generally used for larger units.
4mm Softcoat, a clear Low Emissivity Glass with a coating on the inside of the inner pane that reflects heat back into the building giving thermal insulation performance, Toughenable. This is standard for Domestic Use.
6mm Softcoat, a clear Low Emissivity Glass with a coating on the inside of the inner pane that reflects heat back into the building giving thermal insulation performance, Toughenable, Generally used for bigger units over 2.5 metre sq in area.
Planitherm 1.0, is a superior glass range designed to give you the most advanced thermal insulation performance.
8mm Clear, clear float Glass, Toughenable, generally used for larger units.
10mm Clear, clear float Glass, Toughenable, generally used for much larger units.
8mm Softcoat, a clear Low Emissivity Glass with a coating on the inside of the inner pane that reflects heat back into the building giving thermal insulation performance, Toughenable, Generally used for bigger units over 4 metre sq in area.
10mm Softcoat, a clear Low Emissivity Glass with a coating on the inside of the inner pane that reflects heat back into the building giving thermal insulation performance, Toughenable, Generally used for much bigger units over 4.7 metre sq in area.

We offer a full UK delivery service on all sealed units.

Option up to 28 DAY* - FREE any location within Mainland UK.
(Average Delivery Time is just 2-3 Weeks).

Option up to 21 DAY* - £15 any location within Mainland UK.

Option up to 14 DAY* - £30 any location within Mainland UK.

Option up to 7-10 DAY* - £60 any location within Mainland UK.

Option 3 DAY* - £180 any location within Mainland UK.

Important Information - All our units are delivered unpackaged and ready to fit. Our drivers will always leave your units in a safe place should you not be in when we make your delivery.

Please note that our delivery options are an 'up to' service this means in most cases our deliveries are made much earlier than the amount of days selected. However, this is not guaranteed but merely a guideline. Operating our own delivery service, we ensure your Glass Units arrive in perfect condition. For orders outside of the UK please contact us so we can help calculate a price and arrange with a preferred ferry shipping company.

*3, *7-10, *14, *21 or *28 full 'working' days. Any special requirements can result in additional delivery time. This will be advised shortly after placing the order. Prices for delivery are subject to VAT.

4mm Cavity (10mm Sightline) Argon Filled. Used for period properties where thickness of overall unit is critical. We now offer Krypton filled 4mm cavity. Please call 01234 339800 for more information.
6mm Cavity (12.5mm Sightline) Argon Filled. Also used for period properties where thickness of overall unit is critical but require a little more cavity for additional thermal efficiancy. We now offer Krypton filled 6mm cavity. Please call 01234 339800 for more information.
8mm Cavity (12.5mm Sightline) Argon Filled.
10mm Cavity (12.5mm Sightline) Argon Filled.
12mm Cavity (12.5mm Sightline) Argon Filled.
14mm Cavity (12.5mm Sightline) Argon Filled. Optimum cavity width for thermal efficency. U Value of 1.2 when used with 4mm Softcoat Inner Glass.
16mm Cavity (12.5mm Sightline) Argon Filled. U Value of 1.2 when used with 4mm Softcoat Inner Glass.
18mm Cavity (12.5mm Sightline) Argon Filled. U Value of 1.2 when used with 4mm Softcoat Inner Glass.
20mm Cavity (12.5mm Sightline) Argon Filled. U Value of 1.2 when used with 4mm Softcoat Inner Glass.

A double glazing window comprises two panes of glass, separated by a spacer bar and seals to create a hermetically-sealed environment. The cavity width between the two panes, argon filling used and the type of spacer bar, are all key factors in the unit’s final energy, solar and acoustic insulation properties.

The cavity is filled under vacuum conditions with Argon inert gas to improve insulation and prevent condensation within the unit. The recommended cavity width for Low E energy saving double glazing window when filled with Argon is 14mm and above.

Our Standard Sealed Units are all filled with Argon Gas. Gas-filled units are considered more thermally efficient and are often referred to as 'high performance' (providing the unit is constructed with an emphasis on preserving the gas within it). The requirement to pass EN1279 part 3 standard and the pressure to gain a C+ Window Energy Rating (WER) is creating an increasing demand for units that are gas-filled.