Contents & Glossary of terms
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Acoustic Laminated Glass |
For Further Information see: Sound Control |
Pictures |
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Annealed Glass |
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2 pictures
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Argon |
For Further Information see: |
Pictures |
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Arrissed Edges |
A basic form of edge working, to remove the sharp edges of cut panes of glass in preparation for toughening. 
For Further Information see: |
Pictures
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Aspect Ratio |
The ratio of the longer side of a pane of glass to its shorter side. 
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Bevelled Edges |
A form of decorative edgework on glass or mirror. The thickness of the glass or mirror is reduced around the perimeter to create a sloping edge, or the bevelled edge. Different sizes of bevelled edges are available depending on the thickness of the glass.
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Brewster's Fringes |
Brewster's Fringes is an optical phenomenon which is similar to, although usually much smaller than the interference fringes which can sometimes be seen on toughened glass windscreens. The phenomenon occurs if wavelengths of light meet up with each other when they are exactly 180° out of phase - this is known to physicists as the interference of light. 
In glazing it occurs when the surfaces of the glass are flat and the two panes of glass are parallel to each other, i.e. when the light transmission properties of the installation are of a very high order. The appearance of Brewster's Fringes is not a defect of the glass or evidence of a poor quality unit. The phenomenon is dependent on the laws of physics & it can occur with any glass with a high optical and surface quality. In its nature it is rather like (though very much more than), the fact that under certain conditions, the observer will see a reflection of himself in the glass of a window or a door, this would not be considered as a defect in the glass. The occurrence of the phenomenon has become more common in recent years due to the amount of high quality glass being produced world wide using modern glass manufacturing processes. In particular the float process which is used to manufacture flat glass can be attributed to an increase in the appearance of the phenomenon because it creates glass which is free from the distortion which is inherent in sheet glass.
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Brilliant Cutting |
Abrasive and polishing wheels are used to cut into the surface of flat glass or mirror to create a design & obtain a decorative effect.
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BS EN 12150 (Class 1) |
This is the standard that all Toughened Glass should be manufactured to ------blah blah. - See Wayne. To hold a BS EN certificate a company needs to have their system and procedures audited by a qualified auditor such as CEN Solutions, the British Standard Institute or similar approved body.
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BS EN 1279 (Parts 2&3) |
This is the standard that all Insulated Glass Units should be manufactured to ------blah blah. - See Wayne. To hold a BS EN certificate a company needs to have their system and procedures audited by a qualified auditor such as CEN Solutions, the British Standard Institute or a similar approved body.
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Cavity |
The hermitically sealed air space formed by the spacer bar between the two / three panes of glass in Insulated Glass Units. It is generally filled with air or argon.
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CE Marking |
C/o Wayne. |
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CEN Solutions |
C/o Wayne. |
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CNC |
Stands for Computer Numerical Control. CNC machines are used to polish, drill or bevel glass and mirror.
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Coating |
A microscopically-thin layer or covering on the glass which changes the basic composition and performance properties. Such as a Low-E or Solar control.
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A cross-section of splutter coating process. |
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Condensation |
When water vapour from the air comes into contact with cold surfaces, the vapour condenses on the cooler surface of the glass forming a foggy effect. Condensation can form on the outside of an Insulated Glass Unit (1st face) or the inside of an Insulated Glass Unit (4th face). If condensation forms on the 2nd or 3rd surface of an Insulating Glass Unit it has failed.
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Pictures |
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Construction Product Directive |
C/o Wayne. |
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Credit Application Form |
Please Download Our Credit Application Form HERE |
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dB |
A unit of sound measurement.
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Decorative Units |
Units which incorporate any of the following: 
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Small sample picture of each. |
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Desiccant |
A hygroscopic substance used as a drying agent in insulating glass units.
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Photos
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Diamond Cut |
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Document "L" |
The regulations that covers See Wayne. |
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Document "N" |
The document that covers "Safe Glazing". |
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Double Glazed Unit |
A Double Glazed unit |
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Drilling |
Process of using a drill to put holes in Glass or Mirror for fixing to a wall or other surface.
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Duplex |
See Multi Spacer Bar |
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Edge Clearance |
The distance between the edge of the glass and the rebate in a Timber, Aluminium or PVC-u frame.
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Encapsulated Leaded Lights |
This is the process of taking a new or refurbished leaded light and sealing it into a new Insulated Glass Unit.
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Encapsulated Venetian Blinds |
This is a Venetian blind sealed inside an Insulated Glass Unit which can be operated by external manual controls.
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External Condensation |
Condensation that forms on the outside surface of an Insulated Glass Unit (surface 1).
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Fire-Resistant Glass |
Special type of glass designed to contain flames and inflammable gas for a longer period.
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Float Glass |
A term for perfectly flat, clear glass (basic product). The term "float" glass derives from the production method, introduced in the UK by Sir Alastair Pilkington in the late 1950's, by which 90% of today's flat glass is manufactured.
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"g" Factor |
The Energy Transmittance value ("g" factor) represents the amount of solar heat which gets through glazing. A higher g factor is a better option for achieving Window Energy Ratings [In windows]. A lower g factor is a better option for reducing Solar Gain [In conservatories].
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Gas Fill |
The process of filling the cavity of an insulating glass unit with Argon gas to improve the thermal performance.
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Georgian Bar IGUs |
Insulated Glass Units with coloured bars in the style of frets, grilles or bespoke layouts, secured to the spacer bar within the cavity of the unit, giving the appearance of a traditional Georgian windows. Georgian bars are available in a variation of Colours and Widths.
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Photo Link |
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GGF - Glass & Glazing Federation |
The Glass & Glazing Federation are the independent body that See Wayne. |
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GGF Guidelines |
The industry authority's guidelines for the inspection of Insulated Double and Triple glazed units.
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Glass |
Hard, transparent, translucent, or shiny substance, made by melting a mixture of sand, soda and lime at a high temperature, followed by cooling.
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Glazing Instructions |
The industry standard for glazing Insulated Glass Units in various frame types for wall and roof systems.
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Hard Coat |
An On-line coating method such as Pilkington 'K'.
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Haze |
Haze is an optical phenomenon which makes the glass look like it is covered in a very fine uniform layer of dust when viewed from an oblique angle or viewed under strong light incident on the glass at an oblique angle.
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Hermitically Sealed |
An air tight seal. |
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Hot Melt |
See Sealant |
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Individual spacer Bars |
A system which gives the appearance of several small insulated glass units from a single IGU. Often used in place of (Multi Spacer Bar) when manufacturing IGUs with narrow cavities or complex shaped units.
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Photo of Individual bars (Rectangular / Shaped).
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Insulated Glass Units
[Double Glazed Units] [Triple Glazed Units] |
An Insulating glass unit is the most effective way to reduce air-to-air thermal transfer through the glazing.
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Take the 2 pictures from the Standard products introduction section.
Double & triple glazed cross-sections. |
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Interlayer |
The term applied to the plastic (PVB) or resin material used in laminated glass to bond the glass leaves together. Link to Laminated Glass. |
Cross-section of Laminated glass |
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Laminated Glass |
Laminated glass is a combination of two or more glass sheets with one or more interlayers of plastic (PVB) or resin. In case of breakage, the interlayer holds the fragments together and continues to provide resistance to the passage of persons or objects.
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Pictures
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Leaded & Bevelled IGUs |
Insulated Glass Units that incorporate self adhesive lead, bevelled glass and/or colour films applied to the glass, to create the impression of original leaded lights. Link to GS-02 Decorative Units - Leaded. |
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Leaded & Stained IGUs |
Insulated Glass Units that incorporate self adhesive lead and colour films applied to the glass, to create the impression of original colour stained leaded lights.
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Leaded IGUs |
Insulated Glass Units that incorporate self adhesive lead applied to the glass, to create the impression of Diamond or Square leaded panes .
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Diamond / Square leaded unit images. |
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Light Transmittance. |
The proportion of the visible spectrum that is transmitted through the glass. Sealed units incorporating Low Iron glass & Planitherm Total+ have a better light transmittance than other glass combinations & the use of other Low-E glass types. Light transmittance (LT = 81%) in this combination.
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Low Emissivity (Low-E) Coatings |
Low-E coatings are a microscopically-thin coating of metal oxide. This special coating allows the sun's heat and light to pass trough the glass into the building. At the same time it blocks heat from leaving the room, reducing heat loss considerably.
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Drawings and Images |
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Manufacturing Parameters (IGUs) |
The range of dimensions that IGUs can be manufactured to so that they comply with Safety and Quality Standards (Ie:- minimum & maximum dimensions).
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Monolithic Glazing |
A single pane of glass (not an Insulated Glass Unit [IGU]) |
Picture. |
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Multi Spacer Bar (MSB) |
Spacers bars in the style of frets, grilles or bespoke layouts which are secured to the perimeter spacer bar within the cavity of an insulated glass unit. When installed glazing bars are applied to the outer glass to cover the multispacer bar & create the appearance of several small insulated glass units.
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Photos.
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Ordering IGUs |
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Organic Spacer Bar |
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Oxidisation of Lead |
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Patterned Glass (Obscure) (Privacy) |
Any type of glass with uneven surfaces which offers light diffusion and privacy.
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Several pictures |
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Pilkington "K" |
A type of Low-E glass that can be used in double or triple glazed units to improve (reduce) the "U" Value.
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Pilkington EnergiKare |
A combination of Glass types made by Pilkington UK and Spacer bar to create a branded product.
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Planitherm 4S (Four Seasons) |
A type of Low- E glass that can be used in double or triple glazed units to improve (reduce) the "U" Value. Planitherm 4S also has Solar Control properties.
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Planitherm Total + |
A type of Low- E glass that can be used in double or triple glazed units to improve (reduce) the "U" Value.
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Polished Edges |
A form of decorative edgework on glass or mirror, where the edges of the glass are ground & polished to create a smooth surface which is aesthetically pleasing & safe to handle.
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Processed Glass |
Glass or Mirror that has received a process such as Drilling, Polishing, Bevelling, Brilliant Cutting and or Toughening. These processes cannot be carried out after the Glass has been toughened.
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Photos (see Guardian document). |
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Quality Inspection Guidelines |
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Roller Pick Up |
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Roller Wave |
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Safety Glass |
Glass which must have passed an impact test and either must not break or must break safely. Eg- Laminated or Toughened Glass.
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Photos of Toughened & Laminated glass. |
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Sandblasting |
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Satin Glass |
Pilkington Optifloat® Satin is a high quality, translucent float glass that offers high transmission together with excellent privacy.
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Scratches |
Scratches, sleeks and white scars can often be found in single glass and insulated glass units. The number and degree of acceptability are controlled by a document produced by the Glass & Glazing federation (GGF) .
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Sealant |
This refers to the outer sealant of an Insulated Glass Unit. Once the panes of glass have been assembled, the sealant is applied to make it a hermitically sealed unit.
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Cross-section of an IGU (Double & Triple). |
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Sealant depth |
The sealant depth is the measurement taken from the edge of the glass to the back of the spacer bar. In order to comply with guarantee terms, it is essential that units are made to the sealant depth specifications laid down by the sealant manufacturer. |
Link to cross-section of an IGU
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Seeds |
Seeds and bubbles are small air inclusions incorporated in glass. The number and degree of acceptability are controlled by a document produced by the Glass & Glazing federation (GGF) .
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Self Clean Glass |
Otherwise known as "Easy Clean Glass" - Saint-Gobain Bioclean. Bioclean harnesses the power of both UV light from the sun and rain to efficiently combat dirt and grime that accumulates on the outside of the window (dried water marks, organic atmospheric pollutants, dust, sea spray and insect residues). The performance of the self-cleaning action can vary depending on the amount and type of dirt on the windows, the total exposure to light and rain the glass will receive and the incline of the window. To activate the coating, the glass must be exposed to natural light for several days. The length of time required will also depend on the season and the orientation of the glass.
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Photos. |
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Soft coat |
A Low emissivity glass such as Planitherm Total+ or Planitherm 4S.
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Solar Control Glass |
Tinted and/or coated glass types that reduce the amount of solar heat gain into the building. ( The unit of measure is "g" which is the percentage of heat entering the building/room).
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Solar heat gain |
Solar heat gain or energy transmittance values represent the amount of heat from the sun which gets through glazing.
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Spacer Bars |
Spacer bars are available in two main types. Aluminium (conventional) spacer bar and Warm Edge technology spacer bar (such as Edgetech Super Spacer). Spacer bars run around the perimeter of an insulated glass unit & are sandwiched between two panes of glass to create a cavity.
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Pictures of both types (Ali / Super Spacer). |
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SunGuard® Advanced Architectural Glass
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The Guardian SunGuard ® glass product range is designed to deliver energy efficiency that will meet or exceed energy standard requirements and includes products offering a variety of aesthetically pleasing colour options. The High Selective range presents the highest performing energy characteristics available in high light-transmitting and low-emissivity coatings.
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Super Spacer |
See Warm Edge Super Spacer. |
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Thermal Transmittance |
Thermal transmittance values represent the amount of heat lost through glazing. A lower U Value (W/m²K) is a better option for energy efficient glazing.
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Thermoglaze |
Thermoglaze is the trademark for a range of glass combinations for conservatory roof glazing. Thermoglaze offers Low-E, Solar Control & Self clean from a double glazed unit. There are 4 products within the Thermoglaze roof glazing system.
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Tinted Glass. |
Otherwise known as Body Tinted Glass; Transparent float glass with a consistent colour throughout its thickness. Tinted glass is generally available in grey & bronze but green and blue can also be obtained. Tinted glass is used as a "Solar Control" glass but with the increasing range of Solar Control coatings, tinted glass would now only be considered a "Moderate Solar Control Glass".
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Toughened Glass |
Thermally toughened glass is approximately four times stronger than annealed glass of the same thickness and configuration, and must comply with the requirements of EN 12150: Parts 1 & 2. When broken, it will break into many relatively small fragments, which are less likely to cause serious injury. The typical process for the production of thermally toughened glass involves heating the glass to over 700 degrees Celsius, then rapidly cooling it to lock the glass surfaces in a state of compression.
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Pictures
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Transmittance |
See Light Transmittance. |
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Triple Glazing |
Three panes of glass enclosing two hermetically-sealed air spaces.
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UV Transmittance |
Determines the percentage of solar energy in the form of ultra-violet radiation transmitted by glazing. (UV transmittance is what can make carpets and furniture fade). Using Laminated glass is a good way to reduce UV transmittance.
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U-Value |
U-Value is the measure of the heat gain or loss through glass due to the difference between indoor and outdoor air temperatures (Thermal Transmittance). A lower U-value indicates better insulating properties. The units of measure are W/m 2 Kelvin.
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Warm Edge |
Warm edge technology spacer bars are made from a material which is less conductive than aluminium spacer bars and therefore they reduce the amount of heat transmitted through the spacer bar to the outside. Warm edge bars also help to reduce condensation. |
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Warm Edge Super Spacer |
Warm Edge Super Spacer is the market leader in warm edge technology. It is almost 1,000 times less conductive than aluminium spacer bar. It also reduces condensation and noise.
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Photos
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