octave image
trustpilot logo image

THERMALLY EFFICIENT DOORS

Here at Endurance, we understand the importance of thermal performance for composite doors. When you invest in a new front door, you want to make sure your living space becomes more comfortable all year round. A thermally efficient composite door is an excellent investment as it will help you to save money on your heating bills going forward and give you total peace of mind that you have made the right choice for your home.

With Endurance Doors, we don’t compromise on any aspect of your composite door. You can enjoy exceptional thermal performance alongside a wide range of additional benefits including enhanced security, weatherproofing and durability, and eye-catching bespoke style. Design your composite door online to improve your home without compromise. With a wide range of customisation options to choose from, you will always receive a door that looks as it should and provides the levels of thermal efficiency that you need.

WHAT IS A U-VALUE?

A U-Value measures how well a product such as a window or door, keeps heat inside a property. The lower the U-Value, the more thermally efficient the component. Endurance doors meet the requirements of the latest Approved Document L of Building Regulations, which states that doors must have a U-Value of 1.4 W/(m²·K) or less.

While the U-Value of our door styles may vary slightly, you can rest assured that all Endurance composite doors have a U-Value equal to or less than 1.4. If you want to enhance your composite doors’ thermal performance even further, you could choose triple glazing over our standard double glazing glass designs.

are endurance doors thermally efficient?

LOW U-VALUES

As a result of their solid core construction, Endurance doors boast a U-Value of 1.4 W/(m²·K) in accordance with the British Homes Standard. Keeping you in control of heat loss in your home.

SOLID TIMBER CORE

Endurance doors are built of 17 layers of cross laminated veneer. These layers create a barrier that minimises the transmission of sound vibrations, reducing the impact of external noises on the interior of the property.

AIR TIGHT COMPRESSION

Endurance doors are manufactured to ensure a tight and secure fit within the door frame. An external door gasket and adjustable hinges deliver firm and consistent compression between the door and frame to stop any drafts.

QUALITY GLAZING

Built up of 4mm soft coat glass panes, our high performance range of decorative glass units contain 90% argon gas to reduce heat transmission and improve the thermal performance of your Endurance door.

REINFORCED FRAMES

Our robust uPVC reinforced frame not only contributes to the overall strength and security of an Endurance door, but further boosts the overall thermal efficiency.

HEAT REFLECTIVE SKINS

Our uPVC skins feature CoolSkin technology, providing exceptional levels of surface performance. Reflecting heat energy and maintaining a regulated temperature, trapping warm air inside your home.

ACOUSTIC PERFORMANCE

EXPLORE OUR STYLES

  • SOLID DOORS
  • GLAZED STYLES
  • LARGE GLAZED AREAS

SIRIUS

Solid composite doors provide the highest levels of thermal performance on the market today. With an impressively low U-Value that represents the small amount of heat transfer that they allow, our front doors will effectively trap warm air inside your living space and keep cold air at bay. A thermally efficient composite door, manufactured and installed for you, will be able to save money on heating bills and make the best investment for your home.

Design your door

ALTO

Endurance styles with smaller panes of glass will impressively reduce the amount of heat escaping your living space while also stopping cold air from coming in. If you want to save money on energy bills and reduce your carbon footprint, the thermal performance levels of our front doors will be a solid investment.

Design your door

BOWMONT

Styles with larger glazed areas may offer slightly lower levels of thermal performance than other styles, but they still perform much more impressively than many others on the market. You can rest assured that you and your family will be safe and sound behind an Endurance door, keeping your home warmer and cosier all year round.

Design your door

UNDERSTANDING THERMAL PERFORMANCE

A SOLID TIMBER CORE

The solid timber core of an Endurance door is one of the many features that sets our composite doors apart from others on the market today. At 48mm, the solid core on our doors is 10% thicker than most alternatives, including cross-laminated timber for a design that is stronger and more durable than others. With this in place, it is much harder for heat to escape and for cold air to break through, creating a tough and resilient exterior for your comfort.

contemporary front doors

TOP RATED NO MATTER THE STYLE

Endurance composite doors are renowned for their wide range of customisation options. When you choose us, you can design your dream door online from various styles, hardware, furniture and glazing options. No matter how you design your front door, you will enjoy exceptional thermal performance across the board. Explore the most popular and on-trend colour options with complementary hardware and glazing options to create a truly unique look that suits your home.

DOUBLE OR TRIPLE?

Whether you choose double or triple glazing, our composite doors provide higher levels of thermal performance than most other options on the market today. Glazing is an important feature for a thermally efficient composite door, and with a wide range of glass options available, we’re sure to have the right design for your home without compromising on style, performance or thermal efficiency. Both double and triple glazing are excellent investments for you and your home, giving you total peace of mind regarding sound, energy and thermal insulation.

best composite doors uk

EXPERTLY MANUFACTURED AND FITTED

One of the most important ways to ensure optimal thermal performance for your composite door is to ensure that it has been installed correctly. When you choose Endurance, you will be working with a member of our trusted Installer Partner network. These vetted composite door installers across the country are monitored and regulated by our experts, so you can be sure that they will fit your thermally efficient front door to look and feel as it should.

If you want to start designing your dream composite door today, you can use our online door designer tool. Choose the style, colour and hardware accessories that are right for you and your home. And you can rest assured that no matter which options you choose, you will receive a bespoke, expertly manufactured and fitted composite door with optimal thermal performance all year round.

Build Your Door
Design Your Door Image

DESIGN YOUR PERFECT DOOR

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.

Try Our Door Builder

need more help designing your door?

It can be hard designing the perfect composite door for your home, that is why our showroom team are here to help. Our experienced Design Consultants are based in our North Lincolnshire showroom to support you through every step of the process.

With our free design service you can choose the appointment that suits you best, from a relaxed showroom design consultation to an online appointment, our team are ready to help you design your dream door.

BOOK AN APPOINTMENT