What are the minimum and maximum sizes for windows?

The minimum and maximum size of a window will vary depending on a number of factors including:

The material you require

Aluminium frames are on average 2.5 x stronger than PVCu frames. Allowing them to support substantially larger panes of glass with thinner frames.
Aluminium windows

Opening or fixed?

Does the window need to open? An opening windows maximum size is smaller than a fixed pane window. As the weight of the opening sash needs to be supported by the window hinges. Whereas fixed windows can be a lot larger, as they do not need to support the opening sash’s weight. With a fixed window we can install glazing up to 5 m2 in size. Or to go bigger combine multiple glazed sections with aluminium profile to create a curtain wall.


Many systems have a maximum sash weight. Triple glazing is heavier than double glazing, therefore can affect the maximum size of the window possible.


Each individual product/system will have their own minimum/maximum sizes. Therefore whether you are looking for a small or large window contact our team of experts who will be able to advise on the best option for your requirements. Generally speaking, if its a glass size which is technically possible, Aspect Windows can offer it.

>> Return to windows FAQ’s