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Based in Cheddar, Majestic Designs (UK) Ltd is one of Somerset's highly recommended double glazing specialists.

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How Energy Efficient Are Composite Doors?

18th April 2023 |


Composite Doors

If you’ve been looking into replacing your front entranceway, you have most likely come across composite doors. So just how energy efficient are composite doors?

Modern, resilient and engineered from a combination of durable, high-quality materials, composite doors are an excellent investment for traditional and contemporary homes alike and are available in a diverse array of colours, styles and designs. Perhaps most important, composite doors are also highly secure and energy efficient, boasting exceptional thermal retention ratings for a warmer, more comfortable home all year round.

So what is a composite door? And how energy efficient are they really?

What is a composite door?

Composite doors are manufactured from composite materials, meaning they are engineered using a combination of different materials including timber and uPVC. With a rigid polymer frame, resilient thermoplastic skin and insulating timber core, composite doors are highly durable and strong, with a long life span of at least 35 years. The multiple layers also provide a barrier against severe weather, which is especially relevant here in the UK where adverse conditions can wreak havoc on residential homes.

Why should you choose a composite door?

Engineered to have the appearance of an older-style timber door, composite doors combine bold, modern colours and historical charm with a multitude of modern conveniences. Other benefits of a composite door include…


Many traditional doors are affected by temperature changes and can warp and bend as the seasons change. This not only affects the physical appearance of your home but can cause weaknesses in your front door that make it difficult to operate. Composite doors on the other hand are not affected by temperature fluctuations. This is because of their durable thermoplastic skin, which ensures the door does not warp or stick.


Traditional timber doors require a number of different treatments throughout their lifetime, including staining, painting and varnishing. This kind of routine maintenance is needed to protect the timber from the weather and prevent rot, warping and bending. However, as a result of their engineering and materials, composite doors are completely weather-resistant and do not require regular maintenance.


Composite doors are designed with home security in mind. At Majestic Designs, we install Endurance composite doors which come engineered with multi-point locking systems as standard, including the ATK 3 Star Diamond Cylinder. As a result, Endurance composite doors are anti-drill, anti-pick, anti-bump and anti-snap. They are also built with a strong timber core, making them highly resistant and durable – even when hit repeatedly with a sledgehammer.


One of the biggest advantages of installing a composite door is the diverse array of colours and designs available. From the big and bold to the contemporary and modern, composite doors are available in a number of different styles and can even be finished with a woodgrain effect for that traditional timber look.

Composite doors and energy efficiency

When engineered correctly, composite doors are highly efficient and boast exceptional thermal retention ratings. This is a result of an insulating core, which is combined with other high-quality materials to create a rigid structure far superior to other more traditional doors.

Modern composite doors are also manufactured with weatherproof seals, which help to retain heat and can save you the hassle of costly utility bills. You may also find a reduction in noise pollution, as composite doors can provide exceptional insulation against exterior noise, especially in busy areas with high foot traffic and busy roads.

At Majestic Designs, our range of Endurance composite doors boasts a U-value of just 1.8. They are also engineered with a unique moisture barrier system, meaning they won’t take on any unwanted damp which prevents water ingress and delamination.

How much are composite doors?

uPVC chartwell green porch and black composite door

As composite doors come in so many different styles, colours and designs, the cost of your composite door will ultimately come down to the unique specifications of your home as well as your own personal tastes. For more information about composite doors, your best option is to approach your local window and door installer who will be able to provide you with an accurate quote based on your needs.

Endurance composite doors at Majestic Designs

When it comes to choosing a new composite door, there’s a little something for everyone. Available in a dazzling array of vibrant, modern colours and patterns, composite doors are entirely bespoke and can be tailored to the style of your home as well as your own unique vision. Composite doors are regarded as excellent value for money and well worth the cost due to their durability and resilience in the face of even the most adverse of weather conditions. With exceptional energy efficiency ratings and a long life span, composite doors are also considered a more environmentally sustainable alternative to other doors available on today’s market.

At Majestic Designs, our range of composite doors is designed by Endurance, a leading supplier of composite doors here in the UK. Endurance composite doors are visually appealing and thanks to a durable timber core, are unquestionably strong. They’re also low maintenance with a long life span of at least 35 years and come with a 10-year security guarantee.

Majestic Designs have been partnered with Endurance composite doors for a number of years. During that time, our fully-employed teams of FENSA-accredited and MTC-registered lead installers have cultivated a well-earned, region-wide reputation for approachable customer service and exceptional craftsmanship that goes above and beyond.

If you have a question about composite doors or are ready to book your at-home consultation, please get in touch with the team at Majestic Designs today.

With over 3,400 independent reviews on Fairtrades.co.uk, Majestic Designs are proud to have earned an above 9.48/10 rating in customer satisfaction Click to find out more

Customer Testimonials

“The fitting team were a credit. Clean, efficient and pleasant to know. Site left in a very clean state. Thank you.”

“All round excellent service. Used you in our previous home and was delighted with both installations you have done for us. Thank you.”

“I cannot fault anything & best thing I ever did. I am relieved & happy that I have attractive doors & windows. Thank you.”

“Thank you!”

Local area installations

Serving clients across Somerset and the South West

Majestic Designs install quality double glazing products throughout Somerset. From Taunton to Yeovil and Weston-super-Mare to Wells; our insistence on quality installations and outstanding customer care remains the same. With our factories and showroom in Cheddar, we are conveniently located in the heart of Somerset, with easy access to the surrounding towns and villages. As part of the local community, we are dedicated to improving the lives of all our customers and by employing a local workforce we are investing in the future prosperity of the area.

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