composite door

uPVC Doors, Composite Doors And Energy Efficiency

Now that winter is almost here, you may be wondering how to make your home more energy efficient and save on heating bills. Keeping a house warm during the colder months can be expensive, and the cost of living crisis isn’t making it any easier. Once you’ve got loft insulation and double-glazed windows installed, what else can you do?

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Here at Endurance Doors, we’d recommend upgrading your doors, especially if they’re made of uPVC. In the UK, uPVC is a widespread material for making doors, but we believe that composite doors are the superior choice. They’re more thermally efficient and secure and outperform their uPVC cousins in almost all areas.

uPVC And Composite Doors: What’s The Difference?

uPVC and composite are the two most popular door types in the UK, but what is the difference? It’s down to the materials used in their construction. uPVC stands for Unplasticised Polyvinyl Chloride, a type of hard plastic. uPVC is tough and inflexible and is very useful for building front doors.

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As their name suggests, Composite doors are made with multiple materials. They’re usually built around a solid timber core, with uPVC, laminate or fibreglass forming layers around it. Composite doors are our preferred type at Endurance, and whether you have a traditional or modern home, we can design a composite door to suit it.

what are composite front doors
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Our HomeView Door Designer offers a simple to follow step by step process, enabling you to construct your ideal composite door and see how it looks on your home.

composite doors north lincolnshire

uPVC Doors Vs Composite Doors

When you compare the two types, composite doors are the clear winner. But let’s address the elephant in the room first; uPVC doors are the cheaper option. If you’re working on a tight budget, uPVC doors will put less stress on your wallet and are still a good choice. 

However, providing you can afford the upfront cost, we would have to recommend composite doors. They’re better at retaining heat for one thing; their density makes it harder for warm air to escape your house, which means lower energy bills. In the long run, your savings on heating will make up for the installation price.


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Composite doors are more secure too. uPVC doors are certainly robust and can withstand attempted break-ins, but composites are even tougher. They can withstand severe weather conditions and even sledgehammers. The enhanced security features and locking systems that our doors are fitted with also make lock manipulation harder, so they’re great at keeping out unwanted intruders. 

Lastly, composite doors are just as adaptable as uPVC ones. If you’re looking for something stylish and modern, you might consider our Urban Collection, while our Country Collection is designed for more rustic, traditional homes. Or, if you’re keen to recreate the sophisticated look and feel of aluminium, our Avantal Collection will be right up your street.

Endurance Composite Doors

Composite doors are a welcome addition to any home. Whether you’re looking to upgrade your existing doors or have an entirely new project on the go, we can help you choose the right door. You can email us at or call 01652 659259.

Alternatively, if you want to jump straight in, why not give our online door designer a go? Your perfect front door might only be a few clicks away. 

how to clean endurance composite doors

How Are Composite Doors Made?

17 Laminations

Our composite doors are made up of 17 laminations with a solid timber core. We use BBA accredited, engineered LVL (laminated veneered lumber.). Our 48mm thick core offers exceptional stability and eliminates the possibility of warping over time. Each door is manufactured with an integrated Moisture Barrier System in the base of the door which protects your door from water damage, delamination and maintains its integrity, avoiding common problems with composite doors.


Door Skin

Endurance composite doors feature a laminated door skin with a highly weatherproof and durable acrylic layer, offering exciting vivid colours and luxurious wood effect designs that perfectly match the door frames into which they are installed. Our replacement front doors are finished with a foiled 3D Cool Skin that features an embossed woodgrain texture to offer a surface that won’t crack or fade. Available in 16 colours ranging from neutral shades to bold bright tones, you can create a composite door solution that is colour lasting and will continue to look great even after years of use. Once you’ve selected the style, and design of your new door and applied your preferred colour you can add finishing touches to your composite door with a wide selection of hardware and security options. Select from handles, knockers and letter plates to personalise your door and make it your own.

Hardware Options

With 10 hardware colours to choose from including Gold, Graphite, Antique Black and Chrome you’ll be spoiled for choice when it comes to putting the final touch to your composite door. Created to blend into the surroundings of your property and to complement your existing décor, we know that you’ll be pleased with the finished result.

what are the benefits of the solid timber core external doors

Solid Timber Core

The Endurance door has a solid core unlike others. This robustness means there are more advantages and far fewer problems with composite doors from us compared to other companies.

With 48mm thick cross-bonded veneered laminated timber door lead, Endurance composite doors deliver lateral strength and unrivalled stability.

We use Kerto LVL for our solid core, a material which is incredibly strong and dimensionally stable timber beam. The makeup of our solid core is designed so that it can be cut to any height or width without affecting its integral strength.

Our solid core competitors use cores that incorporate less dense mixed species woods with a stile and rail subframe. The core’s strength comes from the outer subframe in these doors. A narrow or short door involves cutting into this subframe and cutting away the strength of the door. These doors don’t always hold their shape when facing the temperature changes of British weather and central heating.

We are so confident in the quality of our Endurance composite door we offer a 3mm bowing guarantee on our doors.

Build Your Door
Design Your Door Image


Our HomeView Door Designer offers a simple to follow step by step process, enabling you to construct your ideal composite door and see how it looks on your home.

Design Your Door