EN 1279 Parts 1 to 6
A frame needs a U-value or WER (the Architect, Specifier or Frame Maker will give you the U-value or WER for the frame); from this information we can give you the required makeup of the insulating glass unit. Make it clear if your U-value is a centre pane U-value for the glass alone or a combined frame & glass U-value. The size of the rebate in timber frames especially, is critical, the height of the rebate must be at least 15mm & the width, thickness of the unit, plus 6mm for glazing materials, plus the width of the timber bead (normally a minimum of 12mm).
Heritage glazing rebates should be a minimum of 9-10mm.
Glazing should be in accordance with BS8000. See our Arbo Heel Bead Glazing System page for the basic method; contact us for other types of glazing and glazing of self-cleaning glass.
Frames should be of sound structure and primed with suitable materials. Aggressive timbers such as green oaks especially, so as to prevent acids leaching through into units sealants.
Units that are not glazed with suitable materials or following our guidelines will be void of warranty.
Frames should be dry, drained and ventilated. Units should be installed on suitable glazing blocks and equally supporting both glass panes. Blocks should be placed in the appropriate positions to offer support and rigidity to the glazed assembly throughout service.
The correct overall thickness unit should be specified upon order and where necessary glazed with the correct glazing rubbers.
Glazing Plastic frames is specific to system manufacture. If you are unsure you should seek the services of an experienced glazier/installer.
The method of construction compounds tolerances and allowance should be made for this when determining the width of the cover-bar to be applied to the surface of the glass. The width of the cover-bar should be the pitch of the Duplex or Back to Back bar plus 3mm. Deviation from parallel along the bar lines is acceptable.
The rate of heat loss per square metre for a temperature difference of 1 degree Kelvin, or Celsius, between the interior and exterior.
By using either low-e glass with an inert gas if necessary. There are now varying grades of low-emisitivty glass and three inert gasses to choose from. These being Argon, Krypton and Xenon. We can advise what combination will get the results you require.
Clear glass will allow heat from the sun to enter the building un-controlled, contributing significantly to internal temperatures.
Solar heat gain can be reduced by using a solar control glass. These are glasses such as Plikington Suncool’s or Pilkington Activ’ or body tinted floats such as blue, bronze, grey and green.
There are clear and tinted self-cleaning glasses produced by the glass manufacturers with a hard hydrophilic coating to help the removal of dirt when it rains or hosed down. There are other applications available that are applied to the surface of the glass prior to installation, the life of which should be checked with the manufacturers. Please call us if you would like to specify self-cleaning glass.
Yes, we can put square or round holes in units and supply the flap too.
Follow the maintenance instructions below for all types of installation:
It is necessary to apply a viewing standard when it is deemed an insulating glass unit may have a fault. The glass manufacturers apply a standard to their glass for imperfections in the main body of the glass and any coatings they may apply to it during their manufacturing processes. The quality of glass used in the manufacture of insulating glass units is the same as that for single glazing. Working with the materials supplied to us to the relevant EN standards in turn dictates the quality of the insulating glass units supplied to you and has to be taken into account for the finished product.
The viewing standard will be as follows: Annealed glass will be viewed at 2 metres. Toughened, laminated or low e glasses will be viewed at 3 metres. Other coated glasses will be viewed from 3 metres. The viewing will be at 90 degrees, in natural daylight, imperfections may not be marked to highlight their presence and will only be visible to the naked eye. A band 50mm wide around the perimeter of the insulating glass unit is excluded as an area to be viewed. The insulating glass unit will be looked through, not at the surfaces.
Flat transparent glass, including laminated and toughened shall be deemed acceptable if the following phenomena are neither obtrusive nor bunched: totally enclosed seeds, bubbles or blisters; hairlines or blobs: fine scratches not more than 25mm long: minute embedded particles.
Due to the manufacturing process seeds and bubbles are deemed acceptable in patterned glass.
Duplex and Back to Back Bars
The method of construction compounds tolerances and allowances should be made for this when determining the width of the bar to be applied to the surface of the glass. The width of the bar should be the pitch of the Duplex or Back to back bar plus 3mm. Deviation from parallel along the bar lines is acceptable.
We use EVA films manufactured by (Toby to advise) … for the bespoke laminations we undertake (floor panels, barriers and the like). Bridgestone have produced compatibility charts (link opens in a new window) to show which sealants should be used with their EVA films. We stock clear and diffused EVA films.
BS618 font-weight-bold0 defines the type of glass depending on the type of framework and building it is used in. Your Architect, Specifier or Building Control will specify the Uniformly Distributed Load (UDL) in kN/m2 and/or the Point Load in kN. On receipt the type of building, eg domestic or commercial and the loadings, we can make a recommendation as to the type of glass to be used.
We have data for the appropriate thickness up to 1m2. Submit the UDL in kN/m2 and Point Load in kN and advise if a domestic floor, dance floor, corridor, or stair tread, for our recommendations.
Virtually any diameter of hole can be drilled or cut. The internal finish to a hole is generally a smooth one. We can polish holes 25mm diameter and up. In toughened glass there are limitations as to how close to the edge the holes can be positioned. The same applies to for cut-outs. (SEE LIMITATIONS DRAWING)
Shapes can be bevelled and polished. Internal radii must exceed the minimum radius for the type of machine the glass is being worked on. Submit details of the shape required.
Yes. We have CNC machines for glass cutting and processing.
Stencils can be cut from your drawing, after being entered into our graphics machine, a copy will need approving before being put in hand or from your computer generated file. We can also sandblast the reverse of materials like silvered float in detail to create detailed lighting sections for vanity mirrors etc.
Yes, normally in toughened glass to increase the strength of the finished piece so there are rules as to how close to the edge or corner they can be, submit a dimensioned drawing for approval and check limitations drawing.
An EVA multi laminate where one of the toughened glasses used is broken after laminating, this gives a “crazed” appearance. Alternatively we now insert a foil effect between two laminated glasses to achieve the same effect but with a lighter and thinner build weight with less edge-work constraints. At the time of enquiring we need to know what it is you are looking to achieve with detailed drawings if needed. We can then advise on the best achievable solution.
Yes, 6.4mm Laminated One Way. The glass has a grey body tint with a reflective surface coating. The glass is installed with the surface coating facing the observed area. The glass has low light transmittance and high reflectance. When the glass is installed with a lighting ratio of 7:1, the dark side being the side where the observer is (the observer should also wear dark clothing), the reflection will look like a mirror to the observed.
Yes – We can now supply Pilkington Mirropane™
A mirror can be safety backed with a white woven film to give impact resistance on one face to BS6206 Class B. Glass with a white woven safety backing cannot be fixed with a mirror mastic or low modulus silicone. The film is coated with a release agent to enable the roll to be unwound and consequently no manufacturer of safety backing has approved their film to be fixed with an adhesive and conversely no manufacturer of mastic or silicones has approved their products to be used with a safety backing.
A mirror can be backed with an aluminium foil; as such it does not have an impact resistance classification. Foil protects the reflective surface of a mirror and as it has no release agent it can be fixed with mirror mastic or low modulus silicone. Foil is generally used to act as a barrier against moisture in wet environments such as bathrooms. This prolongs life of mirror in these situations. Foil also acts as a barrier against any harmful substances that may be in the substrate that could affect the silvering of the mirror. Certain plastics and plasters have high acidity which can cause a reaction with the silvering.
If desired a mirror can be fixed directly to the substrate with mirror mastic or low modulus silicone provided there is an ample covering to ensure, in the event of breakage, no large and dangerous pieces are able to break off and fall or cause injury.