Last Updated on March 20, 2025

Plastic vs Glass Windows: Pros, Cons, & Benefits

When choosing new windows for your home, property, or commercial building, one of the most important decisions is selecting the right material. Among the most common options, plastic vs glass windows are often at the forefront of homeowners’ and landlords’ minds.

Both materials have unique benefits, but understanding their differences is key to making an informed decision.
In this comprehensive guide, we’ll explore everything you need to know about plastic and glass windows, including the materials, features, the cost of new windows, maintenance, energy efficiency, and more.
By the end of this post, you’ll have a clear understanding of which type of window is right for you.

Plastic vs Glass Windows: A Quick Comparison

Here’s a quick overview of the differences between plastic and glass windows to help you get started:

Plastic vs Glass Windows: Which Is Better?

Choosing between plastic windows vs glass windows largely depends on your priorities. Here are the key features of both materials to help you decide which suits your needs.

Key Features

Pros and Cons Of Plastic Windows

Pros and Cons Of Glass Windows

Which Property Types Are Best for Plastic vs Glass Windows?

Best Properties for Plastic Windows

• Modern and Contemporary Homes: Plastic windows, especially uPVC, are perfect for modern homes due to their sleek appearance and excellent thermal efficiency.
• Energy-Efficient Homes: For properties prioritising energy savings, plastic windows with advanced glazing options can help reduce energy bills significantly.

Best Properties for Glass Windows

• Heritage and Period Homes: If you live in a Victorian, Edwardian, or Georgian home, glass windows (often paired with wood) can maintain the original aesthetic while offering modern energy efficiency.
• Conservation Areas: In conservation areas or homes listed as historical buildings, glass windows are often the preferred option to preserve the property’s appearance and character.

Plastic vs Glass Windows Styles

Both plastic vs glass windows come in a variety of styles. Here’s a look at the different window styles available for both materials:

• Plastic Windows: Available in casement, tilt and turn, sliding, and French windows. uPVC frames are available in a range of colours, including wood-effect finishes.
  
• Glass Windows: Glass windows come in styles like sash, casement, bay, and tilt and turn. Traditional wooden frames often accompany these, offering more design flexibility.

View & Natural Light Intake

• Plastic Windows: While they provide good visibility, plastic windows often have thicker frames which can slightly reduce the amount of natural light.
• Glass Windows: Typically, glass windows allow for a larger surface area of glass, meaning more natural light enters your home.

Insulation & Energy Efficiency

Glazing Options

Both plastic and glass windows come with various glazing options to improve energy efficiency. Below is a table outlining the most common glazing options available:

Glazing Types Explained: Double glazing is standard in both plastic and glass windows, providing decent insulation. Triple glazing, however, offers superior insulation, particularly in colder climates. Low-E glass reflects heat back into your home, while toughened glass increases safety and security. Read our guide to learn more about double glazing costs.

Ventilation & Draughts

• Plastic Windows: Plastic windows generally offer better insulation and draught resistance. However, certain designs may restrict airflow, so it’s important to choose the right style for adequate ventilation.
• Glass Windows: Sash windows, in particular, provide excellent natural ventilation by allowing you to open the top and bottom of the window.

Security Features

• Plastic Windows: Highly secure, especially with multi-point locking systems. The frames are strong and can withstand impact.
• Glass Windows: Glass windows can be reinforced with laminated or toughened glass for added security. However, they are generally more vulnerable to breakage than plastic windows.

Maintenance & Longevity

Here’s a table comparing plastic vs glass windows based on maintenance and longevity:

Maintenance Insight: Plastic windows require minimal upkeep, while glass windows with wooden frames need regular attention to prevent deterioration. Overall, plastic windows tend to have a longer lifespan with less maintenance involved.

Costs & Installation

While plastic windows are generally more affordable upfront, glass windows (especially those with wooden frames or premium glazing options) tend to be more expensive. Here’s a pricing breakdown:

Cost Comparison: Plastic windows are the more cost-effective option in terms of both initial installation and long-term maintenance. Glass windows, however, may offer more aesthetic appeal and longevity.

Installation Requirements & Timeframe

• Plastic Windows: Generally easier and quicker to install, with a timeframe of 1-2 days for a typical installation.
• Glass Windows: More complex to install, particularly with wooden frames, and may take 2-4 days depending on the property.

Which is Best for Your Home: Plastic vs Glass Windows?

Choosing between plastic vs glass windows ultimately depends on your specific needs, property type, and budget. If you’re looking for a cost-effective, energy-efficient option, plastic windows may be the way to go. On the other hand, if you’re focused on aesthetics, especially in a period property, glass windows might be a better fit.

Request a Free Quote for New Windows Today

Now that you have all the details on plastic vs glass windows, it’s time to make your decision! If you’re ready to get a quote for new windows, contact us today. Our team can help guide you through the selection process and ensure you get the best value for your home. Request your free quote now!