This is the 2nd time I have used Compdoor, and the experience just gets better.
23 June 2026
Published by: David Massey
Composite doors have gained popularity in recent years as the preferred choice for both new builds and replacements of existing doors. They offer a combination of durability, security, and energy efficiency that surpasses other options like timber or uPVC doors.
One of the most important factors that sets composite doors apart from alternatives on the market, is their thickness, which contributes to their overall strength and insulation capabilities. In this blog post, we’ll discuss the composition of composite doors so you can find out more and make an informed choice.
To begin, it’s essential to understand their construction. Composite doors are made from a variety of materials, each selected for its specific benefits. These materials are combined and pressed under high-pressure conditions to create a door that is both strong and energy efficient.
The core of a composite door is usually made from solid timber. This core provides strength and insulation, making the door lightweight and energy efficient. Finally, the door is finished with a highly durable “skin” that can resemble the look and feel of real wood. Here at Comp Door, all of our doors feature CoolSkin technology, engineered to withstand extreme temperature changes and maintain optimum impact performance, with a colour protective layer that won’t get worn away or chipped. With over 250 colour combinations to choose from, there’s something for every project.
To find out more, read our blog on What is a Composite Door or check out how our composite doors are made in the video below!
Composite doors are available in various thicknesses, with the most common options being 35mm, 44mm and 48mm. The thickness of a composite door plays a crucial role in its overall performance, particularly in terms of insulation and security.
Thicker doors offer better insulation which helps to keep the heat in and the cold out. They also provide enhanced security, as the extra layers of material make them more resistant to break-ins.
While the standard thickness for composite doors is 44mm, some manufacturers, like Comp Door, go above and beyond by offering doors with a 48mm thickness.
Every Comp Door is manufactured with a premium cross laminated Albasia Falcata timber core, designed to be thermally efficient and offer maximum security. Featuring an industry-first TriSeal frame, our composite doors are built to offer better weatherproofing, reducing the chance of drafts. Fitted with an ABS anti-snap diamond grade cylinder, as standard, our composite doors provide ultimate defence against intruders.
So, why else would you opt for a thicker composite door? Here’s a few reasons why!
Thicker composite doors offer superior insulation properties compared to thinner doors. This means that your home will stay warmer in the winter and cooler in the summer, reducing your energy consumption and costs.
Thicker doors provide enhanced security, making it harder for potential intruders to break in. The additional layers of material in a thicker composite door offer increased resistance against forced entry attempts.
Thicker composite doors are more durable and long-lasting. The extra layers of material make the door more resistant to wear and tear, ensuring it maintains its structural integrity over time. For more information, read our blog on How Long Do Composite Doors Last?
In addition to thermal insulation, thicker composite doors also offer better sound insulation. The extra layers of material help to block out external noise, creating a quieter and more peaceful environment inside your home.
By understanding the benefits of thicker composite doors, you can make an informed decision and invest in a door that offers long-lasting performance and peace of mind.
When selecting a composite door, it’s important to consider the specific requirements of your property. It’s essential to consult with a reputable supplier or manufacturer, like Comp Door, who can provide expert advice and guidance based on your specific needs.
At Comp Door, we offer a personal service and quick lead times with customer support that is open and honest. Above all, we ensure we provide you with a great looking door exactly the way you want it. So, take your pick from our huge range of designs, colours and accessories to create your perfect door today.
