If you want to replace or install new windows in your home, knowing the standard window sizes available in the UK market can save you time and money. This guide will help you learn the standard window sizes for every window type in home areas, helping you make better choices.
Popular House Window Types & Their Average Sizes
There are different types of windows, and thus, their sizes differ accordingly.
1. Casement Windows Sizes:
Casement windows are highly popular in UK homes for residential use. These hinged windows come in multiple patterns and have an opening mechanism that extends outward from the frame.
Casement standard window sizes UK are most often:
- 635mm x 890mm
- 736mm x 1194 mm
- 736mm x 1200 mm
2. Sash Windows Sizes:
The standard sash window design features two vertically moving panels. These Sash windows come in measurements that generally range from:
- Height: 900mm to 1800mm
- Width: 500mm to 1200mm
3. Tilt and Turn Windows Sizes:
The modern tilt-and-turn window gives you two options to open its panels inward, either at the top or the side.
Single tilt and turn window sizes:
- Minimum size: 600mm by 500mm
- Maximum size: 1900mm (74.8in) by 1300mm (51.2in)
Double tilt and turn window sizes:
- Minimum size: 600mm by 1200mm
- Maximum size: 1700mm by 2400mm
Triple tilt and turn window sizes with two outer opening panes:
- Minimum size: 600mm by 1600mm
- Maximum size: 1900mm by 3000mm
4. Bay Windows Sizes:
The structure of bay windows pushes outward from the building walls to create additional space and let in more sunlight. Each window unit makes up a set of mini-window sections.
- Small bay: 1800mm to 2400mm width
- Medium bay: 2400mm to 3000mm width
- Large bay: 3000mm to 3800mm width
Meanwhile, the height ranges from 1000mm to 1500mm.
5. uPVC Windows Sizes:
Both the shapes and uPVC standard window sizes depend on the following measurements, and proper uPVC window repair ensures these dimensions are maintained accurately:
Standard Casement Window Sizes:
- Width: 450mm – 1,200mm
- Height: 450mm – 1,500mm
Standard Sash Window Sizes:
- Width: 600mm – 1,200mm
- Height: 900mm – 1,800mm
Room-by-Room Window Size Guide
Rooms have different standard window dimensions according to light needs and ventilation requirements.
1. Bathroom Window Dimensions:
Your bathroom windows will likely be the smallest in the house. The average window size for them will depend on the type of window they are. Those are:
- 24 x 24 in
- 24 x 18 in
- 24 x 15 in
2. Ideal Kitchen Window Sizes:
The height of kitchen windows differs depending on where they are located. For instance, windows above the sink are calculated according to the kitchen cabinets’ height and the countertop’s thickness.
The ideal window dimensions are 24 x 36 inches, i.e. 609.6 x 914.4mm.
3. Common Bedroom Window Sizes:
Bedroom windows need to allow good airflow and natural light; thus, the window sizes differ accordingly.
It is best to keep bedroom window dimensions UK between 24 inches and 44 inches from the floor. Meanwhile, the window needs a minimum space of 0.33 square meters that should measure 450mm in both width and height.
4. Living Room Window Sizes:
Living rooms have the largest windows in the home. Most commonly, bay, sliding sash, and casement windows are used in the living rooms. Here are the standard window sizes:
Sliding windows:
- 36 x 84 in
- 24 x 60 in
Bay windows:
- 42 x 126 in
- 36 x 78 in
Casement windows:
- 12 x 36 in
- 24 x 84 in
Custom vs Standard Sizes: What’s the Difference?
You gain several benefits from standard window sizes. Here’s how:
- More affordable than custom options
- Readily available with shorter lead times
- Finding standard replacement parts becomes easier
However, you can get custom windows made for the following situations:
- When working on different wall opening designs
- Installing new windows to update older building designs
- Seeking specific design features
Standard window sizes tend to be 20% to 50% cheaper than custom sizes, so choose them whenever possible to save money.
How to Accurately Measure Your Windows
You need exact standard window measurements to replace them properly.
- Take window width measurements at three positions: outer top, mid-section, and bottom edge.
- Measure height at three points: left, middle, and right
- Choose the narrowest measurement for each part of the window.
- Determine the window opening depth to find the correct installation size.
If you are unsure about measuring, consulting a “24/7 emergency window repair specialist” can guarantee you get the right fit.
Conclusion:
Knowing UK standard average window sizes helps you make better decisions. The standard window sizes typically fit new homes; however, older buildings need personalised solutions. Instead of getting confused, professional advice can help find windows that balance looks, function, and budget. Follow basic UK window rules about safety and energy efficiency when choosing new windows.
