Glass And Glazing Federation

This ensures that the gas can neither escape nor air enter, and maintains the frame’s structural integrity. Once complete, the units are ready for assembly using the chosen frame material. Tested to LPS2081/1 and certificated by the Loss Prevention Certification Board, providing you with peace of mind in your home. VELFAC offers a minimum 10-year warranty on windows and a 5-year warranty on casement, sliding, and external doors.

Explore the differences between double and triple glazing to decide which is right for your home. Perfect for wide multi-pane windows that have vertical bars, such as casement windows. Panels slide to give easy access to the existing window for ventilation and can be removed for cleaning. We'll calculate pricing to upgrade any or all of your windows, including our optional installation service.

Double glazing consists of two panes of glass separated by a vacuum or a layer of inert gas such as argon or krypton set in the same frame. The air gap reduces the thermal conductivity between the two panes, keeping the heat inside and the cold out. Many windows also come with Low-E (low emissivity) coatings on one of the glass surfaces, for improved thermal performance. Double-glazed windows have two panes of glass, separated with a layer of normal air or, for more efficiency, a layer of argon gas. The panes are then sealed to keep the gas contained, creating an airtight, sealed unit. To reduce noise and improve thermal insulation, secondary glazing offers an effective and affordable alternative to traditional window replacement.
Surface CoatingsA thin layer or covering which changes the basic composition of glass. SpallSmall fragments of glass that are ejected from the surface of a laminated glass sheet when the opposite surface is impacted. Solar control coatingsA microscopically-thin coating that absorbs or reflects solar energy. SiliconeA polymeric organic compound offering excellent resistance to cold, heat and water.

In monetary terms, replacing timber sash windows can often be an expensive affair. Installing secondary glazing on the other hand is a far cheaper and simpler process. The cost saving doesn’t stop there though, as our secondary glazing solution radically reduces heating costs by ensuring the cold weather remains outside.

This causes any unstable nickel sulfide inclusions (imperfections that may cause spontaneous breakage of the pane) to expand disproportionately to the glass, making the glass break. This is named after the modern process used to create large, thin, flat panels from molten glass which is floated onto a pool of molten metal such as tin. This process produces a very smooth sheet of glass with a highly consistent thickness. Secondary glazing is particularly suitable for use in conservation areas and listed buildings and will retain the original external appearance of your property. Available in uPVC, wood or aluminium, all with a range of colours and options.