Choosing the Right Replacement Windows: A Homeowner’s Guide to uPVC & Aluminium Options

  • July 17, 2025|
  • Windows|
  • sandymount_admin

Key Points

· Choosing the right material for your windows is an important way to maximise security and energy efficiency

· uPVC windows are a cost-effective and energy-efficient option, and are more customisable than most people realise

· Aluminium windows offer modern aesthetics and excellent durability, available in a wide range of colours.

· Window styles, like casement, flush sash, and sliding sash, can be selected based on the style and function you need.

· Sandymount offers high-quality replacement windows with a focus on energy efficiency and customer satisfaction.

If you’re looking to improve your home, new windows can make a huge impact in a variety of ways.

Slimmer sightlines can invite more natural light into your living space, stronger U-Values can save money on heating bills, and a fresh coating can make your property the envy of the street.

Homeowners have more choices than ever before when it comes to windows, with casement, flush sash, and sliding sash styles all popular for different reasons.

In this guide, we’ll walk you through the industry’s trending materials and styles, to help you make the correct decision for your home based on your values.

Window Materials

uPVC Windows

What are uPVC windows?

uPVC (unplasticised polyvinyl chloride) is the most popular window material in the UK. Known for strength, durability, and low maintenance, uPVC windows are available in a variety of colours and finishes to suit your home, including woodgrain effects.

Bright red Japanese maple leaves against white uPVC windows with warm interior lighting.

Benefits of uPVC Windows

· Energy Efficiency: uPVC windows offer excellent thermal insulation, helping to reduce energy bills and keep your home comfortable year-round. They also come with energy ratings that show their performance in reducing heat loss.

· Low Maintenance: Unlike wooden windows, uPVC windows require minimal maintenance. They won’t warp, rot, or fade, making them a long-lasting option for homeowners.

· Affordable: uPVC windows are often more affordable than other materials, making them a great choice if you’re looking for cost-effective window replacements. This is due to the material’s ability to be mass-produced, not any compromises in quality or performance.

Aluminium Windows

What are aluminium windows?

Aluminium windows are known for their modern aesthetics and durability. The metal material is stronger and more rigid than uPVC, allowing for slimmer frames and larger glass panes.

Origin open window

Benefits of Aluminium Windows

· Durability: Aluminium is a highly durable material that resists corrosion and fading. These windows are perfect for modern windows that need to withstand the test of time.

· Energy Efficiency: Though more expensive than uPVC, aluminium windows offer great energy efficiency when paired with a thermally broken frame, providing excellent thermal insulation.

· Sleek Design: Aluminium windows offer a minimalist, modern look, perfect for a contemporary property. They come in a wide range of colours, making it easy to match with your home’s aesthetic. The slim frames allow more natural light to flood into your home than older window frames, making your living space a happier place to be.

Window Styles

Casement Windows

What are casement windows?

Casement windows are hinged at the side and open outward. They are one of the most popular window styles in the UK, offering both style and practicality.

Benefits of Casement Windows

· Energy Efficiency: Casement windows offer a tight seal when closed, helping to prevent draughts and improving the energy efficiency of your home.

· Security: The design of casement windows makes them more secure than some other styles, as they are less likely to be forced open.

· Ventilation: Casement windows can be opened fully, providing great ventilation and airflow for your rooms.

White uPVC casement window

Flush Sash Windows

What are flush sash windows?

Flush sash windows offer a modern style where the glass pane sits completely level with the frame. This gives a traditional look associated with timber windows, with the modern day benefits of aluminium and uPVC.

Benefits of Flush Sash Windows

· Modern Aesthetic: The clean lines and modern finish of flush sash windows make them a perfect choice for homeowners looking for a contemporary look.

· Energy Efficiency: Like other modern windows, flush sash windows are energy-efficient, helping to reduce your home’s carbon footprint.

· Low Maintenance: The minimalist design makes them easier to maintain compared to traditional sash windows.

white r9 flush window

Sash Windows

What are sash windows?

Sash windows consist of two vertical sliding panes, often seen in more traditional homes. While older versions may be more prone to issues like condensation, modern sash windows come with improved seals and double glazing as standard for better performance.

Benefits of Sash Windows

· Aesthetic Appeal: Sash windows are perfect for period properties or those looking to maintain a more traditional aesthetic.

· Ventilation: The sliding design allows for easy ventilation, as you can open the top and bottom sash independently.

· Customisation: You can choose from a range of colours and finishes to make sure your sash windows complement the rest of your home.

Vertical sliding windows in white

Replacement Windows from Sandymount

When it comes to replacing your windows, Sandymount offers a range of options designed to improve the energy efficiency of your home while maintaining style and security.

Whether you need double glazing for better insulation or a more bespoke solution, Sandymount has the perfect replacement windows for your needs.

Our windows are made with high-quality materials like uPVC and aluminium, ensuring durability and performance for years to come.

With a wide variety of styles, including flush casement windows and traditional sliding sash windows, Sandymount guarantees that your new windows will match both the functionality and aesthetic of your home.

Who Are Sandymount?

Sandymount is a leading provider of high-quality windows, doors, extensions, and skylights across North Wiltshire, Oxfordshire, Gloucestershire, and the outskirts of Bristol.

We offer a wide range of products including uPVC and aluminium windows, composite doors, French doors, and of course, our stunning bifold door range. Our commitment to excellence is backed by our FENSA certificate, BRFC, and CHAS accreditations. We pride ourselves on offering exceptional customer service and expert advice throughout your home improvement journey.

To learn more about our replacement windows or to arrange a consultation, please don’t hesitate to get in touch. You can reach us by phone at 01793 230684, email us at windowsanddoors@sandymount.co.uk, or visit our showroom at Unit 4, Sandpool Farm, Oaksey Rd, Cirencester, Britain, GL7 6EA.

Transform your living space with Sandymount’s folding bifold doors and experience the revolution in home design for yourself!

FAQs

1. Do Sandymount windows come with a guarantee?

Yes, Sandymount offers a 10-year guarantee on every type of window, ensuring peace of mind for customers.

2. Are Sandymount’s windows energy-efficient?

Absolutely! Sandymount windows are designed to meet high energy efficiency standards, helping to reduce your home’s energy bills and improve comfort.

3. Do I need planning permission for new windows?

Generally, you don’t need planning permission to replace your old windows in England, unless you live in a conservation area or your property is listed. Always check with your local council if you’re unsure.

4. What materials do Sandymount windows come in?

Sandymount offers a range of windows in uPVC and aluminium materials, both of which are highly durable and energy-efficient.

5. Can Sandymount help with installation?

Yes, Sandymount provides full installation services with certified installers to ensure that your windows meet all necessary building regulations, and you have a hassle free experience.

showroom map

The Locations We Serve

At Sandymount, we cover North Wiltshire, Oxfordshire, Gloucester, and the outskirts of Bristol. However, if you have a certain project in mind, we can travel further depending on the work required.

Find Our Sandymount Locations
showroom map