This makes it vital that you appoint an installer who knows what they’re doing. Anyone that does will measure your windows correctly, because if they don’t, that’s when leaks and draughts can materialise.
To help you gauge what window sizes are required for your home, let’s tell you what some of the most typical window sizes in the UK are.
UPVC Windows
Many of those who choose UPVC over other materials do so as they like its low-maintenance nature and affordability. UPVC windows are generally sized as follows:
- Heights: 600mm, 1050mm, 1200mm, 1350mm, 1500mm
- Widths: 488mm, 630mm, 915mm, 1200mm, 1770mm

Casement Windows
The most popular style of all and highly versatile. These are their usual sizes:
- 635 x 890mm
- 736 x 1194mm
- 736 x 1498mm

Tilt & Turn Windows
With a flexible opening, tilt and turn windows are effortless to clean. Let’s outline the normal sizes of single, double and triple glazed versions:
- Single: 600 x 500mm (min), 1900 x 1300mm (max)
- Double: 600 x 1200mm (min), 1700 x 2400mm (max)
- Triple: 600 x 1600mm (min), 1900 x 3000mm (max)

Window Advice Room-By-Room
Bathroom – Windows in bathrooms tend to be smaller and house frosted or obscure glazing for privacy purposes.
Living Room – The largest windows are mostly reserved for living rooms to coax maximum light.
Kitchen – Usually placed above a sink area in a higher position and shorter in length than normal.
Bedroom – Window sizes in bedrooms massively vary and can entail very wide or very compact openings.

Materials & How They Influence Sizes
The sizes of windows can also be impacted by what material you choose. Here are the three primary window materials:
UPVC: In general, it obeys standard sizes, simplifying fitting and making it cost-effective.
Timber: Bespoke crafted in many instances, particularly when a traditional or listed property is involved.
Aluminium: So shapeable that you can craft the slimmest imaginable profile and integrate a vast glazed expanse.

Permaframe has been measuring up homes for new windows for so long now that we could almost do it with our eyes closed and still provide you with designs that are a perfect fit.
Raring to get replacement windows sorted? Contact Permaframe and leave all the hard graft of measuring to us!
LOOKING TO REPLACE YOUR WINDOWS?
We have a fantastic range to choose from so whether it’s a modern style or traditional timber effect windows – we are confident that we will have windows to improve any home to give it the finished look with elegance.
LOOKING TO REPLACE YOUR WINDOWS?
We have a fantastic range to choose from so whether it’s a modern style or traditional timber effect windows – we are confident that we will have windows to improve any home to give it the finished look with elegance.
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