Tips for windows

What's in a Window

What are the parts of a window or door called?

Windows and doors are made up of a frame, sash (windows) and panels (doors). 

What is a muntin?

A muntin is used in colonial windows to divide glass into multiple panes in the sash. In Australia most muntins are not part of the structure of the window but are simply glued in place.

What is a light?

Lights are individual panes of glass within a window

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What is an insulated glass unit?

This term applies to two (double glazing), three (triple glazing) or more panes of glass that are separated and sealed by insulation at the edges. There is air between the panes. They provide greater thermal efficiency to a window.

What is gas filled glass?

An inert gas, usually argon, is used between the panes of glass in an insulated glass unit instead of air. Gas is a better insulator than air so it increases the thermal efficiency of the window.

What is toned or tinted glass?

This is glass that has been coloured during manufacture by the inclusion of oxides. There are a number of colours that are generally available including grey, green, blue and bronze. Tinted glass will have an effect on the energy efficiency and also the amount of light that enters through a window.

What is Low-E glass?

Low-E stands for low-emissivity. Glass is coated with a very thin, virtually clear material that acts to reduce the transmission of infra-red rays through the glass. Depending on the type used low-e coatings can be used to prevent heat coming in through a window in hot climates and, in cold climates can reduce the amount of long wave heat energy that is lost from a warm interior to the outside. Low-E glass improves thermal efficiency while allowing visible light through.

What is Visible Transmittance (VT)?

Visible transmittance measures how much light comes in through a product. It is an optical property that is expressed as a number between 0 and 1. The higher the number, the more light is transmitted.

How does a door keep the outside elements from penetrating into the interior?

The door works in concert with weather stripping, the door frame, and the threshold to keep the elements at bay. Usually, the door itself has insulating value provided either by its mass, as in a solid door, or by insulating material fabricated into the core by its manufacturer. The weather stripping, door frame and threshold prevent air penetration around the door.

What makes an external door different to an internal door?

An exterior door needs to be finished to resist the elements. This requires that any wood be either sealed or covered with a weather resistant material. The exterior door must be manufactured of materials that are weather resistant.

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