Last Updated on March 31, 2025

10 Things To Consider When Buying New Windows

When it comes to upgrading or replacing your windows, there’s more to the process than simply choosing a style or colour that suits your property. Windows play a significant role in your home’s energy efficiency, security, and overall comfort. 

Whether you’re a homeowner, a landlord, or responsible for a commercial building in the UK, understanding the key factors to consider when buying new windows is essential for making an informed decision.

In this expert guide, we’ll explore 10 essential things to consider when buying new windows. From materials and styles to energy efficiency and security features, we’ve got everything you need to know to make the right choice.

Top 10 Things To Consider When Buying New Windows

1. Window Material: Wood, UPVC, Aluminium, or Composite?

The material of your windows not only affects the aesthetic appeal but also their performance. Below are some key options to consider:

UPVC (Unplasticised Polyvinyl Chloride)

Known for its low maintenance, energy efficiency, and durability, UPVC is one of the most popular window materials in the UK. It’s a cost-effective solution, ideal for homeowners and landlords looking to replace old windows with something more energy-efficient.

Wooden Windows

Traditional and timeless, wooden windows add character to a property but may require more maintenance. They’re great for period properties or for homeowners looking for a natural, sustainable material.

Aluminium Windows

Offering a sleek, modern look, aluminium windows are durable and low-maintenance. They’re a good option for contemporary homes or commercial buildings where aesthetic appeal is crucial. If you’re thinking about choosing aluminium windows, you might find our guide on the cost of aluminium windows helpful.

Composite Windows

Combining the best of wood and UPVC, composite windows offer superior insulation, low maintenance, and a premium appearance. They are often the most expensive but are perfect for those seeking the benefits of both materials.

2. Energy Efficiency and U-Values

Energy efficiency is one of the most important factors to consider when replacing windows. In the UK, energy-efficient windows can significantly reduce heating costs, making your home or building more comfortable.

Look for windows with a low U-value. The U-value measures the rate of heat transfer through the window. The lower the U-value, the better the window’s insulating properties. For the best results, choose windows with double or triple glazing, as these can offer exceptional insulation.

3. Window Styles

Window style affects both the appearance and functionality of your home. Consider these options:

Casement Windows 

Hinged at the side, casement windows are the most common window type in the UK. They provide excellent ventilation and can be fitted to almost any property. If you’re curious about the costs involved in installing casement windows, check out our blog post on the cost of casement windows to get a detailed breakdown

Sash Windows

Traditional, sliding windows that are often found in older properties. While stylish, they may require more upkeep compared to modern options. Check out our guide for a detailed overview of the costs involved in installing sash windows.

Tilt-and-Turn Windows

These versatile windows can tilt inwards for ventilation or open fully, making them ideal for easy cleaning and tight spaces. Read our guide on the costs of tilt-and-turn windows for a comprehensive breakdown.

Fixed Windows

As the name suggests, these windows do not open. They are designed primarily for aesthetic purposes and provide excellent insulation.

Bay Windows

Bay windows extend outward from the main walls of your property, creating a small alcove inside. These windows are often seen in traditional homes and are ideal for creating a sense of space in smaller rooms. They allow for plenty of natural light and can offer fantastic views. Check out our guide on the cost of bay windows to learn more.

Bow Windows

Similar to bay windows, bow windows extend outward, but they are typically made up of four or more panes of glass, creating a smooth curve. This design allows for more light to enter your home and can provide a panoramic view.

Dormer Windows

Dormer windows are installed in a sloping roof, creating extra space and allowing for natural light to filter into upper-floor rooms. Common in attic conversions or loft spaces, dormer windows can increase headroom and improve ventilation. 

They are a popular choice for homeowners looking to maximise the potential of their upper floors or attic areas. If you’re considering installing dormer windows and want to understand the associated costs, be sure to check out our blog post on the cost of dormer windows.

French Windows

French windows, also known as French doors, consist of two doors that open outward to allow access to a patio, garden, or balcony. 

While traditionally used as doors, they can also function as windows, providing an elegant, wide opening to allow natural light and fresh air into your home. Wondering how much French windows cost? Check out our guide.

Floor-to-Ceiling Windows

As the name suggests, floor-to-ceiling windows stretch from the floor to the ceiling, providing unobstructed views and maximising the amount of natural light entering a room. These windows are perfect for contemporary homes, apartments, or commercial buildings where a dramatic, open aesthetic is desired. 

For a detailed look at pricing and factors that can affect the cost, check out our cost of floor-to-ceiling windows blog post.

Sliding Windows

Sliding windows are a popular option for homes with limited space, as they don’t open outward. Instead, one pane slides horizontally over the other. These windows are easy to operate, provide great ventilation, and are commonly used in modern homes or buildings with restricted space, such as apartments. 

If you’re curious about the prices involved in installing sliding windows, you can find a detailed breakdown in our cost of sliding windows blog post.

4. Security Features: Locking Mechanisms and Safety Glass

Security is a primary concern for any property owner. Modern windows come equipped with a variety of security features to deter intruders:

5. Sound Insulation: Noise Reduction for Peace and Quiet

If you live near a busy street, an airport, or railway line, sound insulation is another key consideration. Many modern windows come with soundproofing features, making them ideal for properties in noisy areas.

Look for acoustic glazing or laminated glass to significantly reduce outside noise, creating a quieter, more peaceful environment inside.

6. Maintenance Requirements: How Much Time Will You Spend on Upkeep?

All windows require maintenance, but some materials are more demanding than others. UPVC windows are very low-maintenance, requiring only occasional cleaning to keep them looking their best. Wooden windows, however, may need regular repainting or treatment to prevent rotting or warping.

When choosing your windows, consider the level of maintenance you’re willing to commit to and the long-term costs associated with it.

7. Window Glazing: Double or Triple Glazing?

Glazing plays a significant role in the insulation, noise reduction, and security of your windows.

Double Glazing

This is the most common type of window glazing in the UK. Double-glazed windows consist of two panes of glass with a gap filled with air or gas, improving insulation and reducing energy loss. 

If you’re considering double glazing for your property, our guide on the cost of double glazing provides a comprehensive breakdown of pricing.

Triple Glazing

A step up from double glazing, triple-glazed windows are highly effective at insulating against heat loss, reducing external noise, and increasing security. They are ideal for homes in colder climates or for soundproofing in noisy areas.

8. Cost of New Windows: What’s the Budget?

The price of new windows can vary significantly depending on the material, style, and features. While UPVC windows tend to be more affordable, high-quality composite or aluminium windows may be pricier. Always ensure that your window choice fits within your budget, factoring in both the initial cost and long-term savings through energy efficiency.

9. Environmental Impact: Sustainable Options

As a UK homeowner or landlord, it’s important to consider the environmental impact of your window purchase. Look for windows made from sustainable materials, such as recycled UPVC or wood from certified forests. Additionally, windows with excellent energy efficiency can reduce your carbon footprint by lowering energy consumption.

10. Window Installation: Professional vs. DIY

Finally, consider the installation process. While DIY window installation may seem tempting to save costs, it’s always advisable to hire a professional installer to ensure the job is done right. Professional window installation will ensure your windows are fitted properly, improving both their performance and lifespan.

Look for installers with FENSA certification, which ensures they meet UK building regulations. Proper installation can also help avoid common issues such as drafts, condensation, or poor sealing.

Ready to Upgrade Your Windows? Get a Free Quote Today!

If you’re considering upgrading your windows, the best way to get started is by requesting a free, no-obligation window replacement quote. Whether you’re a homeowner, landlord, or managing a commercial property, our expert team can help guide you through the process of choosing the perfect windows for your needs.