Guide to Making Correct Glazing Choices

At SRL Limited, we are committed to helping our customers make the right buying decisions.

Understanding that different individuals have different requirements, we polled our customers to find out what they were confused about when choosing patio doors. One common trend was understanding what the many terms used to describe glass used in patio doors mean. Some suppliers offer Hard coat. Soft coat, Low – E, argon-filled, self cleaning glass etc. You can’t blame homeowners when they get well and truly confused. In this blog post, we have answered many questions on one of the most vital components of modern patio doors.

From providing entry and exit points, an excellent view of the garden outside, patio doors have evolved with the times to offer excellent aesthetic and functional roles. With the push for going green, most of the functions are around improving the thermal performance. The key value to watch out for is the ‘u’ value of the glass. This represents the value of heat loss in a pane of glass. Lower ‘u’ values indicate high thermal insulation and higher energy ratings too.

Some of the factors that influence the ‘u’ values of a unit of glass include:

  • The overall size of the unit.
  • The type of gas in the unit.
  • The coating on the glass.
  • and The thickness and space between them.

Breaking down the ‘industry terms’ to help our customers, we have a glossary of more glazing choices terms below:

Soft Coating versus Hard Coating.

Gauging the thermal performance of glass is achieved by applying a coating to the glass surface. A soft coat is applied after the manufacture of the glass. It allows the glass to have low UV transmission, while maintaining high light transmission. It offers very low ‘u’ values and can’t be used in singe glazing.

A hard coat is applied during the manufacturing process and can be used in a single glazing application. Hard coating generally offer higher ‘u’ values.

Low–E Glass.

This stands for Low-Emissivity glass that is designed to minimize the amount of visible light and heat that pass through into a room. The light and heat can be reflected or absorbed depending on the composition of the glass. As glass is a malleable component, it can be created in either a hard coat or a soft coat.

Low-E glass can keep excess cold out by reflecting the heat from outside, while trapping the heat inside from being lost, thus warming up a cold room.

Another type of glass commonly used is Low-Iron Glass, which is glass that allows more sunlight into a room. It does this by using glass with very low iron content. Iron causes glass panes to have a subtle greenish tint in them. Initially not very obvious, but as the panes age and condensation builds, the green becomes more obvious.

Self Cleaning Glass.

This has a coating that helps break down dirt particles and effectively clean itself. It’s not by magic, but the molecules in the coating react on contact with water. An extra component, titanium dioxide, allows a breakdown of dirt and grime when exposed to the sunlight, by a process called photocatalysis.

Anti-Sun Glass.

As the name says, anti-sun glass reflects strong sunlight. This may be a consequence of having the room facing the rising sun or simply because you want a more modern look for your home. This glass can come in tints to soften the glare of the sun. reflecting the radiation helps keep rooms cooler in the English summer.

Creating the ideal patio door for your home is easy as you can order specific types that combine features for the best solution for you. Our showrooms in Manchester house a wide range of glass types that you combine with our unique aluminium or steel frames to create stunning doors. Our professional fitters will fit doors that help you keep cool this summer and enjoy your garden views. Call us today for a quote.

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