Windows play an important role in keeping your home warm, secure and comfortable, but like any part of a property, they will not last forever. While some issues can be repaired, there comes a point where replacement becomes the more practical and cost effective option.

The challenge is that windows rarely fail overnight. In most cases, the signs appear gradually, whether that is increasing draughts, condensation problems, difficulty opening and closing the frames or rising energy bills. Understanding what to look for can help you decide whether a repair is sufficient or whether it might be time to consider talking to a replacement window installer.

Draughts and cold spots around your windows

One of the most common signs that windows may need replacing is the presence of noticeable draughts. If you can feel cold air around the edges of the frame, particularly during the winter months, it may indicate that seals have deteriorated or that the window is no longer performing as it should.

Older windows can become less effective at preventing heat loss over time, making rooms harder to heat and potentially contributing to higher energy bills. While replacement seals can sometimes solve the issue, persistent draughts are often a sign that the window has reached the end of its useful life.

If energy efficiency is a particular concern, you may find our guide to the best energy efficient windows helpful.

Condensation between the glass panes

Many homeowners assume that any condensation means their windows need replacing, but this is not always the case.

Condensation on the inside of the glass is often caused by moisture levels and ventilation within the home. However, condensation trapped between the panes of a double or triple glazed unit is a different matter entirely. This usually indicates that the sealed unit has failed, allowing moisture to enter the gap between the panes.

In some cases, the glass unit can be replaced without changing the entire window. However, if multiple units are failing or the frames are also showing signs of age, it may be worth considering a full replacement.

Windows that are difficult to open or close

Windows should operate smoothly and securely. If they become difficult to open, stick in certain positions or no longer close properly, it can be frustrating as well as a potential security concern.

There are several possible causes, including worn hinges, failed mechanisms or frames that have shifted over time. While some of these issues can be repaired, recurring problems may indicate that the window is reaching the end of its lifespan.

This is particularly important for windows that are relied upon as emergency escape routes, such as those found in bedrooms.

Visible damage to the frames

Physical damage is another obvious sign that replacement may be worth considering. Depending on the material and age of the windows, this could include cracks, warping, rot, corrosion or general deterioration.

Small cosmetic issues are not always a cause for concern, but damage that affects the structure or performance of the window should not be ignored. Left untreated, these problems can worsen over time and lead to more expensive repairs.

Modern window systems are designed to be more durable than older products, with both uPVC and aluminium options offering excellent longevity when properly installed and maintained.

Increased outside noise

If you have noticed that outside noise seems more noticeable than it used to be, your windows may not be performing as effectively as they once did.

Older glazing units and worn seals can allow more sound to pass into the home. Modern windows, particularly those fitted with high performance double or triple glazing, can significantly improve acoustic performance and help create a quieter indoor environment.

This can be particularly beneficial for properties located near busy roads, schools or transport links.

Rising energy bills and poor thermal performance

While energy prices are influenced by many factors, ageing windows can contribute to unnecessary heat loss. Older glazing and deteriorating seals can make it more difficult to maintain a comfortable temperature inside the home, resulting in heating systems having to work harder.

If your home feels colder than it should, despite having adequate insulation and heating, your windows may be part of the problem.

Modern window systems are designed to meet much higher thermal performance standards than those installed twenty or thirty years ago, helping to improve comfort and reduce heat loss.

Your windows no longer suit your home

Not every window replacement is driven by performance issues. In some cases, homeowners simply want to improve the appearance of their property.

Perhaps you are planning an extension, renovating an older home or updating a property that still has outdated windows installed decades ago. New windows can transform the look of a home, improve kerb appeal and better complement modern design features.

Materials such as aluminium have become increasingly popular for homeowners looking to achieve slimmer frames and larger areas of glass. If you are considering this option, you may also be interested in our guide to whether aluminium windows are worth it.

Should you repair or replace?

Not every issue requires a full replacement. In some situations, replacing a sealed unit, fitting new hinges or carrying out minor repairs can restore performance and extend the life of a window.

However, when multiple problems begin to appear, such as failed glazing units, recurring draughts, damaged frames and poor thermal performance, replacement often becomes the more sensible long term solution.

The best approach is usually to assess the condition of the windows as a whole rather than focusing on a single issue in isolation.

Exploring replacement window options

If you believe your windows may be reaching the end of their lifespan, it can be helpful to explore the different replacement options available. Factors such as material, glazing specification, appearance and energy efficiency can all influence the right choice for your home.

Our windows page provides an overview of the different styles and materials available, including uPVC windows and aluminium windows.

So, how do you know when it is time to replace your windows?

There is rarely a single sign that tells you it is time to replace your windows. More often, it is a combination of factors such as draughts, condensation issues, difficulty operating the windows, visible damage and declining energy efficiency.

If several of these problems are becoming familiar, it may be worth exploring whether replacement windows could improve comfort, performance and the overall appearance of your home.

FAQs about replacing windows:

Aluminium windows are known for their strength and longevity, making them a popular choice for homeowners looking for a longer term solution. But how long do they actually last in real world conditions?

In this guide, we break down the typical lifespan of aluminium windows, what affects their durability and how they compare to other materials such as uPVC.

The average lifespan of aluminium windows

Aluminium windows are known for their durability and strength, and when properly installed, they can last for several decades without significant deterioration. In most cases, you can expect aluminium windows to last somewhere between 30 and 45 years, and often longer depending on the environment and how well they are maintained. This makes them one of the longer lasting options available and a popular choice for homeowners looking to invest in their property over the long term rather than opting for a shorter replacement cycle.

Why aluminium windows last so long

The longevity of aluminium windows comes down to the properties of the material itself, combined with modern manufacturing methods and finishes that are designed to withstand everyday use and exposure to the elements.

Aluminium is naturally strong and stable, meaning it does not expand, contract or warp to the same extent as some other materials when temperatures change. This helps frames maintain their shape over time, which in turn supports the performance of the glazing and seals. Modern aluminium windows are also finished using powder coating, which provides a durable outer layer that protects against moisture, UV exposure and general weathering, helping to preserve both appearance and structural integrity over many years.

Maintenance and upkeep over time

One of the reasons aluminium windows tend to last so long is that they require very little ongoing maintenance. Unlike timber frames, there is no need for repainting or regular treatment, and they are not prone to issues such as rot or swelling. In most cases, occasional cleaning of the frames and glass, along with keeping moving parts such as hinges and tracks clear of debris, is enough to keep them functioning as expected.

Over time, components such as seals or glazing units may need attention before the frame itself, but this is typical across most window types and does not usually impact the overall lifespan of the aluminium frame.

What affects the lifespan of aluminium windows

Although aluminium is a highly durable material, there are still a few factors that can influence how long your windows will last in practice.

The quality of the system itself plays a role, as well engineered systems such as AluK are designed to perform consistently over time. Installation is equally important, as poorly fitted windows can lead to issues such as drafts, water ingress or unnecessary strain on the frame. Environmental conditions can also have an impact, particularly in more exposed locations where windows are subject to higher levels of wind, rain or airborne salt.

In addition, while the aluminium frame is built to last, elements such as seals and glazing units may require replacement at some point to maintain thermal performance, which is something to be aware of when thinking long term.

How aluminium compares to uPVC over time

When comparing lifespan, aluminium windows generally outlast uPVC. While uPVC windows typically last around 20 to 30 years, aluminium windows can often last 30 to 45 years or more, making them a stronger long term option for many homeowners. However, lifespan is just one part of the decision, and factors such as cost, appearance and maintenance should also be considered.

If you are weighing up both materials in more detail, you can read our guide to the benefits of aluminium windows vs uPVC.

Appearance and performance over time

Modern aluminium windows are designed to retain both their performance and appearance over time. The powder coated finish used on most systems helps protect against fading, chipping and general wear, even when exposed to sunlight and changing weather conditions. While no material is completely immune to ageing, aluminium tends to hold up well compared to many alternatives, particularly when basic maintenance is carried out.

Long term value and investment

Because of their lifespan and durability, aluminium windows are often seen as a longer term investment. Although they typically come with a higher upfront cost than uPVC, their ability to maintain performance and appearance over time can make them more cost effective in the long run, particularly for homeowners who are planning to stay in their property.

If you are considering whether aluminium is the right choice overall, you can also read our guide on are aluminium windows worth it in 2026.

Exploring aluminium window options

If you are looking into aluminium windows in more detail, it can help to understand the different styles, finishes and glazing options available. Our aluminium windows page covers the different designs and configurations, helping you get a clearer idea of what might suit your home and project.

How long do aluminium windows last in practice?

In most cases, aluminium windows will last several decades, often outlasting other common window materials. Their strength, resistance to the elements and low maintenance requirements make them a reliable option for homeowners looking for a longer term solution, particularly where durability and consistent performance are important.

FAQs about aluminium window lifespan

Aluminium windows have become increasingly popular, particularly for extensions and home renovations. But are they actually worth the extra cost, or are they more of a design trend? In this guide, we break down the key benefits, potential drawbacks and how aluminium compares to other materials, so you can decide what is right for your home.

What are aluminium windows and how do they work?

Aluminium windows use slim metal frames instead of uPVC. Because aluminium is strong and lightweight, it allows for narrower frames and larger areas of glass. They are often chosen for more contemporary homes, but they are now being used across a wide range of property styles. Many modern aluminium systems, such as AluK, are designed to offer a balance between performance, appearance and longevity.

If you are still exploring options, our aluminium windows page looks at different styles and configurations in more detail.

Why are aluminium windows so popular?

Slimmer frames and more natural light

One of the main reasons people choose aluminium is the slimmer frame profile. This allows more natural light into the home and creates a cleaner, less bulky appearance compared to traditional window styles.

Strong, durable and long lasting

Aluminium is naturally strong and resistant to warping, swelling or cracking. This makes it particularly well suited to exposed areas and for larger window designs where structural strength is important.

Low maintenance over time

Unlike timber, aluminium does not require repainting or ongoing treatment. A simple clean is usually enough to keep frames looking good over time. If you’re interested in finding out more about their longevity you can read our blog post on how long do aluminium windows last here.

Works for both modern and older homes

While aluminium is often associated with modern design, it can work just as well on more traditional properties depending on the colour and finish chosen.

Are aluminium windows energy efficient?

This is a common concern, especially if you have heard older aluminium systems were less efficient. Modern systems use thermal breaks and high performance glazing to reduce heat loss and improve overall efficiency. With the right specification, aluminium windows can meet current building regulations and provide good levels of thermal performance.

If energy efficiency is a key factor for you, it is also worth comparing materials in our guide to the benefits of aluminium windows vs uPVC. You can also explore how different window types perform in our guide to the best energy efficient windows.

Aluminium vs uPVC windows – what is the difference?

Both aluminium and uPVC windows have their place, and the right choice depends on your priorities, budget and the type of project you are planning.

uPVC is typically more cost effective upfront and has become a widely used, reliable option across many different property types, making it a practical choice for standard replacements.

Aluminium, on the other hand, is often selected for its slimmer sightlines, which allow for larger glazed areas and a more contemporary overall appearance. It also lends itself well to modern designs and larger openings where strength and structure are important. Rather than one being better than the other, it usually comes down to what matters most for your home, whether that is upfront cost, aesthetics or long term performance.

Are aluminium windows more expensive?

Aluminium windows are generally more expensive than uPVC, particularly when comparing like for like sizes and specifications. However, they are often viewed as a longer term investment rather than a short term solution.

Their strength, durability and resistance to wear mean they tend to maintain both their performance and appearance over time, with minimal upkeep required. This can make them a more cost effective option over the long run for some homeowners. For others, the decision comes down to priorities. If keeping initial costs lower is the main factor, uPVC may be the more suitable choice. If the focus is on longevity, design flexibility and achieving a slimmer, more contemporary finish, aluminium is often worth considering.

How long do aluminium windows last?

One of the biggest advantages of aluminium is its lifespan. When properly installed and looked after, aluminium windows can last for several decades without significant deterioration, making them one of the more durable options available. The material itself is naturally resistant to rust and corrosion, and unlike some alternatives, it does not warp, swell or twist with changes in temperature. This stability helps the frames maintain their shape and performance over time, even in more exposed conditions.

Combined with modern finishes such as powder coating, which protect against weathering and fading, aluminium windows are well suited to long term use with very little ongoing maintenance required.

What are the common problems with aluminium windows?

It is normal to have a few concerns when considering a different material. Here are some of the most common ones.

Do aluminium windows feel cold?

Modern aluminium systems include thermal breaks that reduce heat transfer, helping to keep warmth inside during colder months.

Do aluminium windows get condensation?

Condensation is usually linked to ventilation and humidity levels in the home rather than the window material itself.

Good glazing specification and airflow play a bigger role here.

Are aluminium windows noisy?

With the right glazing, including acoustic glass if needed, aluminium windows can help reduce external noise just as effectively as other materials.

Do aluminium windows suit older houses?

While aluminium is often linked to modern homes, it can work well on older properties too.

The key is choosing the right colour and finish. Softer tones or heritage style designs can help aluminium sit more comfortably alongside traditional features.

When are aluminium windows a good choice?

Aluminium windows are often a strong option depending on the type of project you are planning and the overall look you want to achieve. They are particularly well suited to extensions and renovations, where larger openings and more glass can help transform a space.

If you are looking to maximise natural light, achieve a slimmer and more contemporary finish, or create feature windows that make a statement, aluminium is often the preferred choice. Their strength also makes them ideal for wider spans and more ambitious designs that may not be possible with other materials.

They can also work well alongside other aluminium products, such as sliding or bifold doors, helping to create a consistent look throughout the property.

Exploring aluminium window options

If you are still weighing up your options, it can help to look at different styles, configurations and glazing choices in more detail.

Our aluminium windows page covers the different designs available, along with finishes and performance options, to help you get a clearer picture of what might suit your home.

So, are aluminium windows worth it?

Aluminium windows are not the right choice for every home, but they offer clear advantages in terms of design flexibility, strength and lifespan.

Taking the time to compare materials and understand how they perform will help you make the right decision for your property.

Frequently asked questions about aluminium windows

Choosing a front door for a period home can feel tricky. How do you balance heritage charm with modern performance? Whether your house is in Rochester, Tunbridge Wells, Hastings or elsewhere across Kent and Sussex, this post will help you find styles that look right and perform well. At House of Glass, we supply composite doors, aluminium doors, and more, so let us walk through your options.

What makes a “period style” door?

Period style doors are typically characterised by traditional proportions, elegant panel layouts, and features like stained or patterned glazing. The right door enhances kerb appeal while keeping in character with the building.

Key features to look for:

• Sash proportions and decorative mouldings
• Glazing with leaded or frosted details
• Door furniture like traditional knockers or handles
• Heritage colour palettes such as deep greens, heritage reds, navy, and others

You may also find our post on which are the best energy efficient windows helpful when considering matching glazing.

Composite doors – a popular all rounder

Composite doors are a great choice for period homes because they mimic the look of timber while offering better insulation and security. Made from a combination of materials, they are strong, weather resistant, and low maintenance.

Benefits:

• Authentic timber appearance with no painting or warping
• Highly secure multipoint locking systems
• Available in a wide range of heritage colours and finishes
• Glass panels can include patterned, frosted, or stained designs

Pair a composite door with acoustic glazing or solar control glass to enhance comfort and performance.

Want to explore different finishes and styles? Try our composite door designer to customise your ideal front door before you commit.

Aluminium front doors with a heritage twist

While often seen as a modern option, aluminium doors can work beautifully in period properties, especially when finished in a heritage colour or paired with traditional glazing.

Benefits:

• Slim sightlines with high structural strength
• Powder coated finishes in any RAL colour
• Low maintenance and corrosion resistant
• Can include period style glazing and panelling

Explore our range of aluminium doors and consider combining them with modern conservatories or orangery extensions for a balanced upgrade.

uPVC and timber effect doors

For period homes on a tighter budget, uPVC doors offer great performance and can be finished to resemble traditional timber. Timber effect finishes work especially well for Victorian and Edwardian properties.

Benefits:

• Low cost with excellent thermal efficiency
• Wide range of woodgrain foils and panel styles
• Optional decorative glazing and sidelights
• Very low maintenance compared to real wood

Explore our range of uPVC doors, and consider flush casement windows or timber effect windows to complete the look.

Which style is right for your home?

When choosing a door for your period property, consider:

• Your budget and long term goals
• Whether the home is in a conservation area
• Desired colour, style, and hardware features
• Matching with existing windows and extensions

Use our quick checklist:

• Want a traditional look with modern performance? Choose composite
• Prefer a sleek, heritage look with durability? Choose aluminium
• Working to a budget with a need for flexibility? Choose uPVC

Frequently asked questions

Ready to compare options?

At House of Glass, we install composite, aluminium, and uPVC front doors across Kent, Sussex, and London. All our doors come with a ten year insurance backed guarantee, and our in house team is here to help you choose the perfect style for your home.

Contact us today to get your free, no obligation quote

Aluminium vs uPVC: what you need to know first

Choosing the right windows for your home is a big decision. Whether you are replacing ageing frames or planning an extension, it is natural to wonder whether aluminium or uPVC windows are the better option.

Both materials offer great performance, but they come with different strengths. At House of Glass, we supply and install high quality aluminium windows from Cortizo and uPVC windows from Eurocell – so we can give you an honest view of both.

What is the difference between aluminium and uPVC windows?

uPVC (unplasticised polyvinyl chloride) is a type of durable plastic that has been widely used in British homes since the 1980s. It is low maintenance, weather resistant, and one of the most affordable options on the market.

Aluminium, on the other hand, is a sleek, slimline frame option that is stronger and longer lasting than uPVC. Thanks to modern thermal break technology, aluminium windows are now just as energy efficient too.

Still comparing glazing performance? You might also like our blog on which are the best energy efficient windows.

Benefits of aluminium windows

• Slim sightlines – aluminium allows for larger panes of glass and more natural light
• Modern appearance – ideal for contemporary builds or minimalist renovations
• Strong and durable – does not warp, crack, or discolour over time
• Low maintenance – needs only occasional cleaning to stay looking great
• Sustainable – aluminium is fully recyclable and has a long lifespan
• Perfect for large or custom windows – strength allows for oversized panes or unusual shapes

They also pair beautifully with other contemporary features such as aluminium bifold doors or modern conservatories.

Benefits of uPVC windows

• Cost effective – typically more budget friendly than aluminium
• Energy efficient – great thermal performance, especially with triple glazing
• Style options – available in a wide range of colours and finishes
• Traditional appeal – often a better match for period homes or conservation areas
• Low maintenance – no repainting or treatments required

You can also choose uPVC in flush casement styles, timber effect finishes, or even as sliding sash windows for added character.

Need help deciding? Our post on why choose double glazing may help you weigh the options further.

Which is better – aluminium or uPVC?

There is no single right answer – it depends on your home, budget, and personal style.

If you are aiming for a modern, minimalist look and want slim, high performance frames that will last for decades, aluminium windows are a smart investment.

If you are working to a tighter budget or live in a more traditional style home, uPVC windows offer excellent value without compromising on performance.

Both options can be fitted with acoustic glazing, solar control glass, or triple glazing for extra comfort and efficiency.

Frequently asked questions

Ready to compare options?

We install both aluminium and uPVC windows across Kent, South East London, and surrounding areas. All work is carried out by our in house team, backed by a ten year insurance guarantee and covered by FENSA certification.

No pushy sales, same day quotes, and honest advice from a local, family run team.

Contact us today to get your free, no obligation quote

Is your conservatory too hot to enjoy in summer?

If your conservatory feels more like a greenhouse than a relaxing living space during the warmer months, you are not alone. Many homeowners across Kent and the South East find their conservatories become uncomfortably hot in summer, especially if they still have an old polycarbonate roof or standard glazing.

The good news is that there are proven ways to cool your conservatory down and make it usable all year round.

Why do conservatories overheat in summer?

Conservatories are designed to let in lots of natural light, but without the right materials, that sunlight can turn into trapped heat. Common reasons include:

• Ageing polycarbonate roofing
• Poor ventilation or limited opening windows
• Standard glass with no solar control
• Older double glazing or even single glazing
• Dark furnishings that absorb heat

These issues are especially common in conservatories built over ten years ago and can make the space almost unusable during warmer weather.

If your roof is showing signs of age or underperformance, this easy guide to conservatory roof replacement might be a useful next read.

Quick fixes you can try

If you are looking for short term relief, here are a few simple measures to help cool things down:

• Roof blinds or thermal curtains to reduce glare and slow heat build up
• Portable air conditioning units to provide short bursts of cool air
• Ventilation through open windows and doors to encourage airflow
• Reflective window film to help bounce sunlight away

These solutions can offer temporary comfort, but they often fall short during heatwaves or in south facing properties.

Long term solutions that really work

If you are serious about making your conservatory comfortable in summer and winter, the most effective approach is to upgrade the roof or glazing.

Replace your roof with a warm conservatory roof

Warm roofing systems like the Supalite conservatory roof are designed to regulate temperature throughout the year. At House of Glass, we supply and install these systems across Kent and surrounding areas. They include:

• Thermally efficient tiled finishes
• Fully insulated plastered ceilings
• Optional integrated lighting
• Significant improvements in energy efficiency

A warm roof will not only keep your conservatory cooler in summer, it will also help retain warmth in winter and reduce your energy bills.

Choose a glass conservatory roof with solar control

If you still love the bright, airy feel of a glass conservatory roof, consider upgrading to the Supalite S2 glass roof system. This offers:

• Solar control glazing to reduce overheating
• Better insulation than older glass or polycarbonate
• Sleek modern aesthetics
• Options for self cleaning or tinted finishes

You could even combine it with a skypod for a bright, open feel with better ventilation and year round usability.

Improve your conservatory glazing

Even with a good roof, older windows can be a major source of heat. Upgrading to double or triple glazed windows with solar control glass can make a huge difference. We offer:

• uPVC windows for thermal efficiency and low maintenance
• Aluminium windows from Cortizo for a slim, modern look
• Acoustic and solar controlled glazing for comfort and noise reduction

You can also read more about the benefits of upgrading in our post on why choose double glazing.

Do I need a new conservatory or can I upgrade?

In most cases, you do not need to rebuild from scratch. We can upgrade your existing conservatory with a new roof or improved glazing, giving you a more usable space without the cost of a full replacement. Planning permission is often not needed either.

Learn more about our conservatory roof replacement services

Conservatory upgrades across Kent and the South East

From Maidstone to Tunbridge Wells, Sevenoaks to Orpington, we help homeowners across Kent, South East London, and surrounding areas transform their conservatories into spaces they can enjoy again.

House of Glass offers same day quotes, no pushy sales, and a ten year insurance backed guarantee. All our installers are FENSA registered, and we never use subcontractors.

Frequently asked questions

Ready to enjoy your conservatory again?

If you are tired of your conservatory being too hot to use, we are here to help. Speak to House of Glass for friendly advice, same day quoting, and expert installation throughout Kent and the South East.

Contact us today for your free, no obligation quote