UPVC vs. Composite Doors: What is the Difference?
Choosing a new front door is a big decision. It’s not just about curb appeal; it’s about security, energy efficiency, and long-term value. For many homeowners in Kent, the choice often comes down to two popular options: uPVC doors and composite doors. But what’s the real difference, and which is right for your home? Here at FirstGlaze, we’ve put together this guide to help you make an informed decision.
The Main Difference: Materials and Construction
The most significant difference is in how these doors are made.
- uPVC Doors: uPVC (un-plasticised polyvinyl chloride) doors are manufactured from a single type of durable, engineered plastic. They typically feature a uPVC frame with a steel core and are often filled with an insulating foam. This simple construction makes them a popular and budget-friendly choice.
- Composite Doors: Composite doors are a multi-layered product. They are constructed by using several materials – such as solid timber, insulating foam, and a robust outer layer of glass-reinforced plastic (GRP). This layered design creates a much stronger, more robust door.
Security and Durability
When it comes to protecting your home, both door types offer good security, but composite doors have an extra advantage.
- uPVC Doors: Modern uPVC front doors come with multi-point locking systems and reinforced panels, making them a significant upgrade from older timber doors. They are secure and durable but affordable, whilst composite doors may extend the lifespan and add an extra layer of security.
- Composite Doors: The multiple layers and solid core of a replacement composite door make it incredibly difficult to break. This enhanced strength, combined with advanced locking cylinders, provides a superior level of security and peace of mind. As a trusted installer, FirstGlaze can equip your door with a Yale ten-year insurance-backed guarantee, which applies to our locks on both uPVC and composite doors.

Thermal Efficiency and Insulation
Both doors are far more energy-efficient than traditional wooden doors, helping you save on heating bills.
- uPVC Doors: With their multi-chambered profile, uPVC door replacements are excellent thermal barriers, effectively preventing heat from escaping your home.
- Composite Doors: The solid, high-density core of a composite door provides exceptional insulation. This multi-layered design makes them a top choice for thermal performance, often resulting in lower U-values and a more comfortable home environment year-round.
Aesthetic and Customisation
uPVC and composite doors from FirstGlaze offer a wider range of design potential.
- uPVC Doors: While uPVC doors are now available in more colours than just white, they are still limited in their design options. At FirstGlaze, we offer numerous options for our uPVC doors – even offering a wood-effect uPVC.
- Composite Doors: Composite doors are known for their versatility. The outer GRP skin can be finished to mimic the look and feel of a traditional timber door, complete with an authentic woodgrain effect. They are available in a huge array of colours, finishes, and glazing options, allowing you to create a bespoke entrance that effectively showcases your property’s character.
Maintenance and Lifespan
Neither option requires the regular painting, staining, or varnishing that a timber door needs.
- uPVC Doors: These doors are very low-maintenance, only needing a wipe-down with a damp cloth to keep them clean. However, over a long period, their colour may fade slightly, giving them a typical lifespan of around 20-25 years. uPVC doors are a great option for making an affordable investment for your home.
- Composite Doors: With their durable, weather-resistant outer layer, composite doors are practically maintenance-free. They are highly resistant to fading, cracking, and warping and are designed to last for 30 years or more, retaining their like-new appearance with just an occasional wash.

Cost and Value
The final consideration is cost, which many homeowners view as a deciding factor in choosing a new front door.
- uPVC Doors: Being less expensive to manufacture, uPVC doors have a lower initial cost. This makes them a great, cost-effective option for homeowners on a tighter budget who still want a secure, low-maintenance door.
- Composite Doors: Modern composite doors have a higher upfront price due to their premium materials and manufacturing process. However, when you factor in their superior lifespan, enhanced security, and better thermal efficiency, they are often considered a worthwhile investment that can add significant value to your home and save you money in the long run.
Which Door Is Right for Your Kent Home?
The best choice depends on your priorities.
- Choose a uPVC door if you are:
- Working with a budget and looking for an affordable yet reliable option.
- Prioritising minimal upkeep and good thermal performance.
- Choose a composite door if you are:
- Seeking the highest level of security and durability.
- Looking for a premium, customisable door that will significantly enhance your home’s curb appeal.
Regardless of your choice, our expert team at FirstGlaze provides a first-class, personal service with competitive pricing and flexible finance options, including “Buy Now Pay Later.” We’ve been serving Rochester, Maidstone, and the entire Kent area for over 30 years.
Ready to find the perfect door for your home?
Call us today for a free, no-obligation quote on 01634 931 098 or learn more about replacement uPVC and composite doors by visiting our website.
Here at FirstGlaze, we offer transparent front door prices, as well as windows, aluminium frames, and double glazing repairs, so you can get your project started today. Or, use our online quoting engine for an instant price.