UKO Glass

How Do You Choose the Right Glass Specification for a Window or Door? Choosing the right glass specification is an important part of high-quality windows and doors. While the frame, hardware and overall design all play a role in the finished product, the glazing specification can have a significant impact on thermal performance, safety, security, noise reduction and comfort. With so many glazing options available, knowing which specification is right for each project isn’t always straightforward. So, what should you consider when choosing a glass specification for a window or door? Here’s what you need to know. Consider the Thermal Performance Requirements One of the first things to consider when choosing a glass specification is thermal performance. Windows and doors can be a significant source of heat loss within a building, so selecting the right glazing can help improve energy efficiency and reduce heat transfer. The thermal performance of a glazing unit is commonly measured using its U-value. This indicates how quickly heat passes through a material, with a lower U-value representing better insulation. When comparing glass specifications, it’s important to consider the following options: For fabricators, matching the glazing specification to the performance requirements of the complete window or door is essential. Understand the Different Types of Glass Not all glass is manufactured for the same purpose. Depending on the application, you may need to consider different glass types to achieve the required levels of strength, safety, appearance or performance. Some of the most common options include: Toughened Glass Toughened glass is heat-treated to increase its strength compared with standard annealed glass. When it breaks, it shatters into smaller, relatively blunt fragments rather than large, sharp pieces. This makes it a popular choice for applications where safety glazing is required, including certain windows and doors. Laminated Glass Laminated glass consists of two or more panes bonded together using an interlayer. If the glass breaks, the interlayer helps hold the fragments in place, reducing the risk of pieces falling away. It can be particularly useful in applications where retaining the integrity of the glazing following breakage is important. Acoustic Glass Acoustic glass is designed to help reduce the amount of external noise passing through a window or door. It typically uses specially designed laminated constructions with acoustic interlayers to improve sound insulation. This can be a useful option for properties near busy roads, railway lines, airports or other noisy environments. Solar Control Glass Solar control glass helps manage the amount of solar energy entering a building. Depending on the specification, it can reduce unwanted heat gain while still allowing natural daylight into the room. This can be particularly beneficial for buildings with large glazed areas or rooms that receive significant direct sunlight. Understanding the differences between these options makes it easier to select a specification that meets the requirements of each project. Check the Safety Glass Requirements Safety is another important consideration when specifying glass for windows and doors. Certain locations within a building require safety glazing to reduce the risk of injury if the glass breaks. This is particularly relevant for glazing in and around doors, low-level windows and other critical locations. The two main types of safety glass commonly used are toughened and laminated glass. However, choosing between them depends on the application and the specific requirements of the project. Toughened glass is designed to break into smaller pieces, while laminated glass is designed to retain broken fragments within the interlayer. Think About Security Requirements Security is another factor that can influence the glass specification, particularly for ground-floor windows, entrance doors and other accessible areas. Although the frame, locks and hardware all contribute to the security of a window or door, the glazing should also be considered as part of the complete system. Laminated glass can provide additional security benefits because its interlayer helps hold the glass together following an impact. This can make it more difficult for someone to create an opening by simply breaking through the glazing. Consider Noise Reduction External noise can have a significant impact on the comfort of a building, particularly in busy urban areas or properties close to transport routes. If noise reduction is a priority, acoustic glazing may be worth considering. Acoustic glass can offer further improvements through the use of specialist laminated interlayers and carefully selected glass thicknesses. Look at Solar Control and Light Transmission While thermal insulation is important, it’s also worth considering how much natural light and solar energy the glazing allows into a building. Large windows, patio doors and glazed extensions can make a significant difference to the amount of daylight entering a room. Solar control glass is designed to help manage this. For example, a property with large south-facing windows may benefit from solar control glazing to help manage overheating, while a north-facing room may place greater importance on maximising natural daylight. Consider the Appearance of the Finished Window or Door Performance isn’t the only consideration when choosing a glass specification. The appearance of the finished window or door can also influence the decision. Glass is available in a range of finishes and decorative options, allowing fabricators to offer products that suit different property styles and customer preferences. Some options to consider include: Finding a Reliable Glass Supplier Having access to the right glass options is essential for fabricators looking to meet a wide range of project requirements. A reliable glass supplier should be able to provide different glazing types, thicknesses and specifications, alongside the technical support needed to help you select suitable products. At UKO Glass, we supply high-quality insulated glass units (IGUs) to window and door fabricators across the UK. Our range includes double and triple glazing, toughened and laminated glass, acoustic glazing, solar control glass and decorative options, giving fabricators access to a variety of specifications to suit different applications. Looking for a new glass supplier? Get in touch with us on 01422 861116 today!

How Long Can Fire-Rated Glass Resist Fire? When it comes to fire safety, every second matters. The materials used within a building can play an important role in containing fire, limiting its spread and helping people reach safety. Fire-rated glass is designed specifically for this purpose, providing a transparent barrier that can withstand extreme heat and help prevent flames, smoke and hot gases from passing through for a defined period. But exactly how long can fire-rated glass resist fire? In this guide, we’ll discuss more about this and why choosing the correct glazing solution is so important. What Is Fire-Rated Glass? Fire-rated glass is specialist glazing engineered to perform under the extreme conditions of a fire. Unlike standard glass, which can crack, break or lose its structural integrity when exposed to intense heat, fire-rated glass maintains its performance for a specified period. This allows it to act as a barrier between different areas of a building, helping to contain fire and smoke. It is particularly useful in areas where fire compartmentation is important, including fire doors, internal partitions, stairwells, windows and other glazed structures. One of the major advantages of fire-rated glass is that it can provide this protection while still allowing natural light and visibility to pass through. This makes it a practical solution for buildings where safety is essential but there is also a need to maintain an open, bright environment. How Long Does Fire-Rated Glass Resist Fire? Fire-rated glass does not have one universal fire-resistance time. Instead, testing classifies its performance based on how long it can meet specific requirements when exposed to fire. Common fire-resistance ratings include 30, 60, 90 and 120 minutes, depending on the type of glass and glazing system. At UKO Glass, our fire-rated solutions can provide protection for up to 120 minutes and integrity for up to 260 minutes. What Does a Fire Rating in Minutes Actually Mean? You may have seen fire-rated glass described as 30-minute, 60-minute or 120-minute glass. But what does this actually mean? The number shows how long the glazing can meet its specified fire-performance criteria during controlled testing. For example, a 60-minute fire-rated glazing system is designed to provide the required level of performance for 60 minutes during the relevant fire test. However, this doesn’t mean that the glass will necessarily fail immediately after that period. Instead, the rating represents the tested performance of the complete system against the specific criteria for which it has been assessed. This distinction is important because fire performance isn’t determined by the glass alone. The frame, seals, fixings and installation method can all have an impact on how the complete glazing system performs during a fire. What Is Fire Integrity? When discussing fire-rated glass, you’ll often come across the term “integrity”. Fire integrity refers to the ability of a glazing element to prevent flames and hot gases from passing through to the non-fire side for a specified period. Maintaining integrity is particularly important when fire-rated glazing is being used to separate different areas of a building. If flames and hot gases are able to pass through the glazing, the fire could spread into another compartment or area. Fire-rated glass maintains its integrity under intense fire conditions, helping create a barrier between the fire and areas that need protection. How Is Fire-Rated Glass Tested? Fire-rated glass undergoes rigorous testing to determine how it performs when exposed to high temperatures and fire. During a fire test, the glazing faces controlled heat conditions designed to replicate the intense temperatures of a developing fire. Assessors then evaluate its performance against the relevant criteria. Testing can assess factors including how long the glass remains intact and whether flames or hot gases are able to pass through the glazing. Does Fire-Rated Glass Stop Fire From Spreading? One of the main purposes of fire-rated glazing is to help contain a fire and limit its spread. Buildings can be divided into different fire compartments to help prevent fire from quickly moving from one area to another. Glazed sections within these areas need to provide appropriate levels of fire performance so that they don’t become a weak point in the overall fire strategy. Fire-rated glass is particularly valuable in areas such as stairwells and escape routes, where visibility can be important during an emergency. Where Is Fire-Rated Glass Used? Fire-rated glass has a wide range of applications across commercial, public and other buildings where fire safety is a key consideration. Common applications include: Does Fire-Rated Glass Last Forever? The fire rating of glass refers to its tested performance during a fire, rather than its everyday lifespan. Fire-rated glass doesn’t simply “expire”. The number refers to how long it is designed to meet specific performance criteria when subjected to fire conditions. As with any glazing product, however, fire-rated glass should be properly maintained and inspected. Damage such as cracks, significant scratches or delamination can affect the condition of the glazing. It’s also important to ensure that the surrounding frame, seals and other components remain in good condition. Regular checks can help identify any visible issues and ensure that the glazing remains suitable for its intended application. Fire-Rated Glass From UKO Glass At UKO Glass, we supply made-to-order fire-rated glass for projects where fire safety and performance are essential. Our fire-rated solutions withstand high temperatures and help prevent the spread of flames, smoke and hot gases. Our glass can provide fire protection for up to 120 minutes and integrity for up to 260 minutes. Need fire-rated glass for your next project? Get in touch with UKO Glass on 01422 861116 today!

When discussing modern glazing, one question often comes up: how does Low-E coating work? Low-E glass, also known as low emissivity glass, has become an essential component in energy-efficient windows and doors. Designed with a microscopically thin coating, Low-E coatings help control heat transfer through the glass while maintaining excellent natural light transmission. By balancing solar heat gain, thermal efficiency, and visible light levels, Low-E glass improves comfort throughout the year while helping homeowners reduce their energy bills. What Is Low-E Glass? Low-E stands for low emissivity, which refers to a material’s ability to emit or radiate thermal energy. Standard glass has a relatively high emissivity value, meaning heat can pass through it more easily. In contrast, low e glass features a transparent coating made from layers of metal oxides that are applied to the glass surface during the manufacturing process. This thin layer is designed to reflect infrared heat while still allowing visible light to pass through the glass unit. Because of this, homeowners can enjoy bright interiors filled with natural light without compromising thermal performance. Low-E coatings are so thin that they are often described as being approximately 500 times thinner than a human hair, yet they can dramatically improve the thermal insulation and overall glass performance of a window. Understanding How Heat Moves Through Glass To understand how Low-E coating works, it helps to understand the different ways heat can move through a window. Heat transfer occurs in three primary ways: Conduction Conduction occurs when heat travels through a solid material. In glazing, heat naturally moves through the glass itself from the warmer side to the cooler side. Convection Convection is the movement of heat through gases or liquids. Within a double or triple glazed unit, heat can transfer through the air or inert gas between the panes of glass. Radiation Radiation is the transfer of heat through electromagnetic waves. Everyday objects continuously emit radiant heat energy, including people, furniture, radiators, and household surfaces. Radiant heat transfer is where Low-E coating delivers its biggest benefit. How Does Low-E Coating Reduce Heat Loss? The primary function of a Low-E coating is reflecting internal heat back into the building. During colder months, radiators, underfloor heating systems, and household appliances generate heat energy that naturally wants to escape through the glazing. The Low-E coating acts as a thermal barrier, reducing radiant heat loss by reflecting long-wave infrared energy back into the room. In fact, some high-performance Low-E glass products can reflect up to 98% of long-wave heat, helping to improve heat retention and keep indoor spaces comfortable. Because the coating reflects indoor heat rather than absorbing it, homeowners benefit from improved thermal efficiency, lower heating bills, and a more consistent indoor temperature throughout the year. How Does Low-E Glass Perform in Summer? Many people assume Low-E glass only benefits homes during winter, but it can also contribute to year-round comfort. Modern Low-E coatings are designed to manage solar energy efficiently. While allowing visible light to enter the building, the coating can help reduce the amount of unwanted solar heat gain entering a property during warmer periods. This is particularly useful for: By helping to regulate internal temperatures, Low-E glass contributes to a more comfortable indoor environment throughout the year. How Does Low-E Glass Perform in Winter? One of the biggest advantages of Low-E glass is its ability to improve comfort and heat retention during the colder months. As outdoor temperatures drop, homes naturally lose heat through windows and glazed areas. Low-E coatings are specifically designed to minimise this heat loss by reflecting internal heat back into the room. While allowing plenty of natural light and visible light to enter the property, the Low-E coating acts as a barrier against radiant heat loss. The coating reflects long-wave infrared heat generated by radiators, underfloor heating systems, and other sources of thermal energy, helping to keep warm air inside where it belongs. By reducing heat transfer through the glass, Low-E glass helps maintain more stable indoor temperatures, improves thermal efficiency, and can reduce reliance on the heating system. The result is a warmer, more comfortable living environment, improved energy efficiency, and potentially lower heating bills throughout the winter months. For properties in cold climates, Low-E glass can be especially effective when combined with technologies such as argon gas filling and warm edge spacer bars, creating a glazing system that delivers outstanding thermal performance all season long. Low-E Glass and Heat Gain Different types of Low-E coatings are designed to manage solar gain in different ways. Some coatings maximise passive solar heating, while others prioritise solar control by limiting unwanted heat gain. For properties located in cold climates, Low-E coatings can help utilise solar heat from direct sunlight, reducing reliance on the heating system. In contrast, solar control Low-E glass is often used in warmer climates and large glazed elevations where managing summer temperatures is important. This balance between solar heat, visible light, and thermal performance helps create comfortable living environments throughout the year. Low-E Glass and UV Protection Low-E glass does more than manage heat. It can also help minimise exposure to harmful ultraviolet radiation. Modern Low-E coatings can block a significant proportion of UV light and UV radiation, helping to protect furniture, flooring, fabrics, and artwork from fading over time. This means homeowners can enjoy naturally bright interiors without exposing furnishings to the damaging effects of prolonged sunlight. Where Is the Coating Applied? In a double glazed unit, the Low-E coating is typically applied to the inside face of the inner pane of glass. Because the coating is sealed within the glazed unit, it is protected from weather exposure, cleaning products, and everyday wear and tear. This protected position allows the coating to continue performing effectively for many years without requiring maintenance or replacement. Most homeowners will never notice the coating visually, as it remains virtually invisible once installed. The Relationship Between Low-E Coatings and U-Values When discussing glazing performance, U-values are frequently mentioned. A U-value measures how effectively a building

How Does a Glass Cutting Machine Work? For many glass manufacturers, automated cutting tables play an important role in producing accurate panes efficiently and consistently. They allow large sheets of glass to be processed into the specific sizes and shapes required for windows, doors, insulated glass units and specialist glazing applications. Here at UKO Glass, we use advanced machinery, such as the Bottero 353 BKM and Bottero 548 LAM glass cutting systems, to help us manufacture glass to the exact requirements of each project. But how does a glass cutting table actually work? Let’s take a closer look. What Does a Glass Cutting Table Do? A glass cutting machine is designed to score large sheets of glass accurately before the glass is separated along those scored lines. Unlike cutting materials such as wood or metal with a traditional blade, glass is not usually cut all the way through. Instead, a small cutting wheel creates a controlled score on the surface of the glass. This score creates a line of weakness. The glass can then be broken along that line using controlled pressure, creating the required pane. Modern automated cutting tables use computer-controlled movements and software to determine where and how the glass should be cut. This allows manufacturers to process large sheets quickly while maintaining a high level of accuracy. Step 1: The Glass Sheet Is Loaded The process starts with a stock sheet of glass being loaded onto the cutting table. The Bottero cutting system has an air cushion available to help move sheets across the working surface. The air cushion is particularly useful because it reduces friction between the glass and the table, allowing large sheets to be moved more easily while helping to minimise unnecessary contact with the glass. Step 2: The Cutting Plan Is Created Before the machine starts cutting, the required glass sizes need to be programmed into the system. This is where software becomes an important part of the process. For example, a large sheet might need to be divided into several different panes for a number of windows. Instead of simply cutting the pieces in whatever order they are entered, optimisation software can work out an efficient cutting pattern. The aim is to make the best possible use of the original sheet and reduce waste. Step 3: The Machine Detects the Glass One of the advantages of modern automated cutting equipment is that the machine can use information about the glass itself when determining how it should be processed. Bottero systems can automatically measure glass thickness using a linear encoder. The machine can then use this information to load the appropriate cutting parameters. Different types and thicknesses of glass require different cutting conditions. The pressure used to score the glass needs to be controlled carefully. Too much pressure could create an unnecessarily deep score, while insufficient pressure could result in an inconsistent score that does not break cleanly. By automatically adjusting the cutting parameters according to the glass being processed, the machine can maintain greater consistency across production. Step 4: The Cutting Head Scores the Glass A cutting head then travels across the sheet following the programmed cutting pattern. Rather than using a conventional saw blade, the cutting head uses a small cutting wheel to score the glass. The machine carefully controls the movement and pressure of the cutting head as it follows the required dimensions. Step 5: The Glass Is Broken Along the Score Scoring the glass is only part of the process. Once the required lines have been created, the glass needs to be separated. The operator then applies controlled pressure to the scored areas, allowing the glass to break along the intended lines. This is known as breakout. The objective is to create clean, accurately sized pieces without putting unnecessary stress on the glass. Why Is Precision So Important? Glass might look simple, but achieving consistent dimensions is critical when it is being manufactured for use in windows, doors and insulated glass units. A pane that is even slightly different from the required specification could create problems later in the manufacturing process. Accurate cutting therefore provides an important foundation for everything that follows. Of course, machinery is only one part of achieving a quality finished product. Skilled operators, appropriate quality control and careful handling remain essential throughout the manufacturing process. Can Glass Cutting Machines Cut Different Shapes? The glass cutting table uses CNC technology enabling it to cut both standard and complex shaped glass pieces. Operators can select from a library of pre-programmed shapes or import custom DXF files directly into the system, allowing bespoke designs to be produced with precision and repeatability. The CNC-controlled cutting process ensures accuracy and efficiency on a usually labour-intensive process, along with consistent quality across both one-offs and multiple high volume orders. Does Automation Make Glass Cutting Faster? One of the biggest benefits of automated glass cutting is efficiency. However, automation can also reduce unnecessary manual handling. That does not mean people are removed from the process. Instead, skilled operators oversee the machinery, monitor production and ensure the finished glass meets the required specification. The technology effectively gives operators greater control over a more efficient manufacturing process. Specialist Glass Manufacturing From UKO Glass At UKO Glass, we manufacture a wide range of specialist glass products in our West Yorkshire facility, using advanced machinery alongside the experience of our skilled team. If you’re looking for specialist glass, get in touch with our team today on 01422 861116 to discuss your requirements and find out how we can help.

How Should Glass Be Stored? Glass is a strong and versatile material, but it still needs to be handled and stored correctly to help prevent damage. Poor storage conditions can increase the risk of chips, scratches, cracks and breakages, potentially turning perfectly good glass into an unnecessary replacement cost. Let’s take a look at some steps that can help reduce the risk of damage. Store Glass Panels at an Angle One of the most important considerations when storing glass is how it is positioned. Glass should always be stored at an angle rather than laid flat. A suitable timber A-frame, glass rack or wooden slats can provide the support needed to keep glass safely positioned. The support should be suitable for the size and weight of the glass being stored. It should also be stable enough to prevent the glass from moving or falling. Avoid storing glass directly on solid metal, concrete or stone surfaces. These hard surfaces can increase the risk of damage, particularly around the edges of the glass. Timber supports are generally preferable because they provide a more suitable surface for the glass to rest against. However, the support itself should still be clean, dry and free from anything that could scratch or damage the glass. When positioning glass on an A-frame or rack, make sure the units are supported evenly. Avoid putting excessive pressure on a small area of the glass, as this can increase the risk of damage. Protect the Edges of the Glass The edges of glass can be particularly vulnerable to damage during storage and handling. Even a small chip or impact may appear insignificant at first. However, damage to the edge can potentially develop into a larger breakage later, especially when the glass is being moved or installed. For this reason, it is important to take care when placing glass onto a storage rack or A-frame. Glass should be kept separated using suitable packers. These help prevent individual units or panes from coming into direct contact with each other and reduce the chance of them rubbing, striking or putting pressure against one another. It is also important to check the condition of the storage area before placing glass onto it. Remove any debris, loose materials or objects that could come into contact with the glass edges. Taking a few extra moments to protect the edges can help prevent avoidable damage and costly replacements further down the line. Keep Glass Dry Where glass is stored can be just as important as how it is stored. Glass units should be kept in a clean and dry area, away from unnecessary exposure to water and moisture. Moisture can become a concern when it is allowed to sit around the edges of glass units for extended periods. Keeping glass dry can help protect the units and support their longevity. This is particularly important when storing glass for any length of time before installation. A damp or poorly ventilated storage environment can allow moisture to collect around the glass and its edges. Where possible, store glass inside a suitable covered area that protects it from rain, standing water and other sources of moisture. The storage area should also be kept clean. Dust, dirt and debris can accumulate on surfaces and potentially come into contact with the glass during handling. A clean and dry storage environment is a simple way to help keep your glass in good condition until it is ready to be installed. Secure Glass in Glass Rack to Prevent Movement Glass should always be stored securely. Because glass is heavy and can be difficult to handle, unsecured units can present a serious safety risk. A sudden movement could cause the glass to shift, fall or become damaged. Glass stored on an A-frame or rack should therefore be secured to help prevent accidental movement. Depending on the storage system and the type of glass, suitable methods can include tying or wrapping the glass to keep it securely positioned. The aim is to prevent the panels from moving or falling while still allowing them to be safely accessed when required. Avoid placing other materials where they could knock into or fall against stored glass. Avoid Overloading Glass Storage The storage equipment you use should be suitable for the glass you are storing. Glass can be extremely heavy, particularly when storing large double or triple glazed units. Overloading an A-frame or rack can affect its stability and increase the risk of movement or collapse. The rack or A-frame should be positioned on a stable, level surface. Check it regularly for signs of damage, instability or wear. Handle Glass Carefully During Storage When moving glass into storage, take care to avoid impacts, particularly around the edges and corners. Even if the glass looks fine after an initial impact, damage may become more noticeable later. Plan where each unit will be stored before moving it. This avoids unnecessary repositioning and helps keep the process organised. Where appropriate, use suitable handling equipment and make sure anyone moving the glass understands the correct handling procedures. Large or heavy units may require more than one person or suitable lifting equipment. Never attempt to move a glass unit if it cannot be handled safely. Once the glass is in position, check that it is properly supported and secure before leaving it. Looking for a Reliable Glass Supplier? Proper storage is only one part of getting the most from your glass. Choosing the right glass supplier is equally important. At UKO Glass, we supply a range of glass solutions, helping businesses source the products they need for a variety of projects. If you are looking for a reliable glass supplier for your next project, get in touch with us by emailing theteam@ukoglass.co.uk to discuss your requirements. Download Brochure

Why Do Some Glass Units Look Blue? If you have ever looked at a modern window or glazed door and noticed that the glass appears to have a subtle blue tint, you might have wondered why. Is the glass actually blue and what does this tell you about the glass unit? Why Does Glass Look Blue? Glass is generally thought of as completely clear, but in reality, it can have a very slight natural colour. Standard glass contains small amounts of iron, which can give it a subtle green hue, particularly when you look through thicker pieces of glass. However, when a glass unit appears blue from certain angles, the colour is often linked to a coating. This coating is applied to the glass during manufacturing. Modern double and triple glazing can include specialist coatings to improve thermal, solar or optical performance. These coatings can alter how light reflects and passes through the glass. As a result, they can sometimes create a noticeable blue or green appearance. Low-E Glass Can Have a Blue Appearance One of the most common reasons modern insulated glass units can appear slightly blue is the use of Low-E glass. Low-E stands for “low emissivity”. These coatings are designed to improve the thermal performance of glazing by reducing the amount of heat that is lost through the glass. A Low-E coating works by reflecting a significant amount of long-wave infrared radiation back towards the interior of a building. This helps keep more heat inside rather than allowing it to escape through the window. Depending on the particular Low-E coating used, the glass may have a subtle colour or reflective appearance when viewed from outside. This is one of the reasons you may see blue or blue-grey tones on newer, high-performance windows. What About Solar Control Glass? Solar control glass is another type of specialist glazing that can sometimes have a distinctive appearance, including blue or blue-grey tones. As the name suggests, solar control glass is designed to help manage the amount of solar energy entering a building. Large areas of glazing can allow significant amounts of sunlight and solar heat into a property. While natural light is desirable, excessive solar gain can cause rooms to become uncomfortably warm, particularly during the summer months. Solar control glass can help reduce the amount of solar energy passing through the glazing while still allowing natural daylight into the space. Different solar control coatings are available, and they can produce different levels of reflectivity and colour. Some may appear relatively neutral, while others can have more noticeable blue, silver, grey or green tones. Why Does the Colour Look Different From Different Angles? You may have noticed that a window can look blue from one position and almost completely clear from another. Again, this is largely down to reflection. The amount of light reflected from a glass surface changes depending on the angle at which you are viewing it. The surrounding environment also plays a major role. A window looking towards a bright sky may reflect a lot of blue, whereas a window facing a darker building or shaded area may appear much more neutral. The size of the glass, the surrounding frame, the direction the window faces and the amount of natural light can all influence its appearance. Why Is Glass Sometimes Green Instead of Blue? Blue is not the only colour you may notice in modern glazing. As mentioned earlier, ordinary glass can have a subtle green tint because of the iron content naturally present within the material. This can become more noticeable when looking through thicker glass or viewing the edge of a pane. Glass Options At UKO Glass, we offer a wide range of glass options to suit different requirements, including Low-E, Ultra-Low E and Solar Control glass. We also offer self-cleaning glass options, including ClearGlaze and BlueGlaze, as well as laminated glass options suitable for applications where additional safety and security performance is required. If you’re looking for the right glass specification for your next project, drop us an email on theteam@ukoglass.co.uk.