Emergency London Glazing
Our experienced and friendly staff can quote you immediately to replace any glass in any window or door, single or double glazed (DG Guaranteed for 10 years) all of our work is fully guaranteed. We offer an emergency service at no extra cost. Within the hour or at a time that suits you.
About our glazing company in London
We offer professional services by qualified GLAZING specialists, fully experienced and on standby in . Our full list of services include Shopfront Replacement, Double Glazing, Mirrors, Glazing Repairs, Porches, UPVC Repairs, New UPVS doors/handles and hinges, Frames, Cat Flaps fitted, Lead light repairs. For emergency glazing services in London visit Glass & Glazing London, the experts in all glazing jobs.
We test your existing glass and if it complies, permanantly stamp it to BS6206, or give free advice on replacement specification. Full reports prepared when required. Dial for free advice and information on your liability, let us guide you through the maze of BS 6206. We have been pioneers of the glass and glazing industry for over 30 years, our professional expertise can save you ?’s in unnecessary costs.
For full list of our glazing services please telephone free to head office for further information.
Glass safety notes
Safety for Glazed Walls, Doors, Side Panels, Windows and screens.
1. Critical Safety Areas. The areas of internal and external walls which are considered ‘critical locations’ in terms of safety are:
1.1 Between the finished floor level and 1500mm above that level in doors, and in side panels which are within 300mm of either edge of the door.
1.2 Between the finished floor level 800mm above that level in the case of walls, partitions and windows.
2. Requirements of BS 6262 Part 4
2.1 Safe Breakage For doors and door side panels, the glazing used should not break, or should break safely in accordance with Class C of the standard impact test BS 6206(1981) if 900mm wide or less, or Class B if wider than 900mm. For other low level glazing the pane should comply with at least BS 6206 Class C. Use laminated or toughened glass, or plastics glazing sheet, or wired glass, that meet BS6206, or glass with plastic film applied so the pane of glass with film meets BS6206. For unbacked mirror glazing accessible to impact from one side only, the pane should comply with BS 6206 Class C0 if equal to or less than 900mm wide or Class B0 if wider than 900mm. Unbacked glazing either has no backing behind which does not retain its integrity or is cracked or broken when tested as described in BS 7449 (1991): Appendix A. If the mirror glazing is fully backed by a solid material, like a wall or timber wardrobe door and it is securely fixed so that there is space of no more than 25mm between the mirror and the backing material, then a glass which does not comply with BS 6206 may be used
2.2 Small Panes Ordinary annealed glass may be used in small panes up to a maximum width of 250mm and an area not exceeding 0.5m2. Such glass must no be less than 6mm in thickness, expect in the case of traditional lead lights and copper lights, where 4mm can be used.
2.3 Robustness Robustness refers to the strength of the glazing forming fronts to non domestic buildings such as shops, showrooms, offices, factories and public buildings. Some glazing, such as polycarbonate, is inherently strong. Annealed glass, that does not normally comply with BS 6206, can gain robustness with increased thickness. Annealed glass may only be used in critical locations, therefore, when the nominal thickness and dimensions are as listed in the table below. Nominal Thickness (mm) Max Pane Size Dimensions (mm) 8 1100 x 1100 10 2250 x 2250 12 BS 6262 Pt 4 4500 x 4500 Document N 1992 3000 x 4500 15 or Thicker No Limits Glazing, which derives from the Middle English for ‘glass’, is a part of a wall or window, made of glass.
Glazing also describes the work done by a professional “glazier”. Glazing is also (less commonly) used to describe the insertion of ophthalmic lenses into an eyeglass frame. Common types of glazing that are used in architectural applications include clear and tinted float glass, tempered glass, and laminated glass as well as a variety of coated glasses, all of which can be glazed singly or as double, or even triple, glazing units. Ordinary clear glass has a slight green tinge but special clear glasses are offered by several manufacturers. Glazing can be mounted on the surface of a window sash or door stile, usually made of wood, aluminium or PVC. The glass is fixed into a rabbet (rebate) in the frame in a number of ways including triangular glazing points, putty, etc.. Toughened and laminated glass can be glazed by bolting panes directly to a metal framework by bolts passing through drilled holes. Glazing is commonly used in low temperature solar thermal collectors because it helps retain the collected heat.
Float glass 90% of the world’s flat glass is produced by the float glass process invented in the 1950s by Sir Alastair Pilkington of Pilkington Glass, in which molten glass is poured onto one end of a molten tin bath. The glass floats on the tin, and levels out as it spreads along the bath, giving a smooth face to both sides. The glass cools and slowly solidifies as it travels over the molten tin and leaves the tin bath in a continuous ribbon. The glass is then annealed by cooling in an oven called a lehr. The finished product has near-perfect parallel surfaces. The side of the glass that has been in contact with the tin has a very small amount of the tin embedded in its surface. This quality makes that side of the glass easier to be coated in order to turn it into a mirror, however that side is also softer and easier to scratch. Glass is produced in standard metric thicknesses of 2, 3, 4, 5, 6, 8, 10, 12, 15, 19 and 22 mm. Molten glass floating on tin in a nitrogen/hydrogen atmosphere will spread out to a thickness of about 6 mm and stop due to surface tension.
Thinner glass is made by stretching the glass while it floats on the tin and cools. Similarly, thicker glass is pushed back and not permitted to expand as it cools on the tin. Annealed glass Annealed glass is glass without internal stresses caused by heat treatment, i.e., rapid cooling, or by toughening or heat strengthening. Glass becomes annealed if it is heated above a transition point then allowed to cool slowly, without being quenched. Float glass is annealed during the process of manufacture. However, most toughened glass is made from float glass that has been specially heat-treated. Annealed glass breaks into large, jagged shards that can cause serious injury, and thus, the reason it is considered a hazard in architectural applications. Building codes in many parts of the world restrict the use of annealed glass in areas where there is a high risk of breakage and injury, for example in bathrooms, in door panels, fire exits and at low heights in schools or domestic houses. Laminated glass Main article: Laminated glass Broken tempered laminated glass “wet blanket effect” Laminated glass is manufactured by bonding two or more layers of glass together with layers of PVB, under heat and pressure, to create a single sheet of glass. When broken, the PVB interlayer keeps the layers of glass bonded and prevents it from breaking apart.
The interlayer can also give the glass a higher sound insulation rating. There are several types of laminated glasses manufactured using different types of glass and interlayers which produce different results when broken. Laminated glass that is made up of annealed glass is normally used when safety is a concern, but tempering is not an option. Windshields are typically laminated glasses. When broken, the PVB layer prevents the glass from breaking apart, creating a “spider web” cracking pattern. Tempered laminated glass is designed to shatter into small pieces, preventing possible injury. When both pieces of glass are broken it produces a “wet blanket” effect and it will fall out of its opening. Heat strengthened laminated glass is stronger than annealed, but not as strong as tempered. It is often used where security is a concern. It has a larger break pattern than tempered, but because it holds its shape (unlike the “wet blanket” effect of tempered laminated glass) it remains in the opening and can withstand more force for a longer period of time, making it much more difficult to get through.
Toughened glass (tempered glass) Main article: Toughened glass Toughened glass in a vandalized phone booth in Britain Toughened (or tempered) glass is a type of safety glass that has increased strength and will usually shatter in small, square pieces when broken. It is used when strength, thermal resistance and safety are important considerations. Using toughened glass on automobile windshields would be a problem when a small stone hits the windshield at speed, as it would shatter into small squares endangering the driver and passengers. In commercial structures it is used in unframed assemblies such as frameless doors, structurally loaded applications and door lites and vision lites adjacent to doors. Toughened glass is typically four to six times the strength of annealed glass.