Everything You Need to Know About Modern Composite Doors


In recent years advances in modern technology have seen huge leaps forward taken in the home improvement industry.

An example of this is the composite door, a material that has successfully managed to merge the beautiful aesthetics of timber with the modern benefits of other popular door materials.

Since its creation in the mid-1990s, it has become one of the most popular entrance door types, largely thanks to its immense security, durability, energy efficiency, and pleasant appearance.

This comprehensive guide will walk you through everything you need to know about modern composite doors, to help you make an informed decision for your home.



Light grey composite door with glazed panels and sidelights

What is a composite door?

Composite doors are a type of exterior door made from a combination of materials, combining to create the ultimate product.

The core of a composite door is usually made up of either solid timber or foam, with the timber option especially offering great durability, security, and thermal efficiency.

This inner core is often complemented with a uPVC (unplasticised polyvinyl chloride) or GRP (glass-reinforced plastic) outer layer, both providing impressive weather resistance and durability.

The outer layer can often be customised in a wide range of styles and colours, with woodgrain effects available for a traditional look, as well as more contemporary options.

What are the benefits of a composite door?

Composite doors have taken the best bits of several door materials to create one ultimate hybrid which offers several benefits, including:


One major flaw in wooden doors is that they are especially vulnerable to the elements, whether it be sun, rain, or wind.

Over time they have been known to rot, crack, or peel, issues which can lead to expensive maintenance down the line.

Composite doors on the other hand are tough, able to withstand even the harshest of the British weather all year round.

At Landmark Windows & Doors, our are built with a solid timber core, offering strength, reducing heat loss, and blocking out exterior sound – whilst being 10% thicker than most other doors, so you can have total peace of mind that your modern composite door will pass the test of time.

Style Versatility

Composite doors are available in a variety of different styles and colours, and at Landmark Windows, we offer our customers across Devon and Cornwall 24 beautiful shades to choose from.

This means that no matter whether you live in a newly built house, a traditional cottage, a bungalow, an apartment, or anything else, there will be a composite door finish that can match, complement, or enhance your existing aesthetic.

As well as our range of contemporary and traditional colours, you can also select decorative glazing and hardware to really unlock the potential of your new front door.

Unmatched Security

We use timber material as an inner core for our composite doors, as it is incredibly strong and creates a rigid structure that’s difficult to break through.

Our composite doors come fitted with the most advanced locking systems available and are approved by the police-backed initiative Secured by Design, with our deadbolt lock being the largest in the UK (25.4mm).

This combination of a sturdy material and resolute hardware protects your home from unwelcome intruders all year round.

Thermal Efficiency

One of the major requirements and demands from homeowners in 2024 is that doors are as thermally efficient as possible, to save them money on their energy bills.

Thanks to their firm core and modern materials, composite doors are excellent at insulating your home, reducing both heat loss and your carbon footprint in the process by minimising the need for electric heaters and radiators.

This retention of heat is vital in the winter, and in the summer its core prevents unwelcome heat from entering through your front door.

Red composite door with decorative glazing panes and chrome furniture
Dark blue double composite door with silver handles

What do I need to consider when buying a composite door?


Modern composite doors often have a wide range of hardware, such as handles, hinges, and bolts, to choose from.

The importance of quality hardware, for both aesthetics and security, is why we supply two-star lever handles on our composite doors, the highest possible Kitemark accreditation.

This is complemented with a 3-star encased Ultion cylinder, possessing a hidden lock that can detect attacks and automatically activate (increasingly important given that 85% of break-ins occur through lock snapping.)

We offer a variety of lock positions, ensuring that there’s an option that fits your unique door. Knockers are also available in stunning colours such as gold, chrome, satin, white, and black.

Even better, all products in our Sweet hardware range come with a 20-year anti-corrosion guarantee for your added peace of mind.


Modern composite doors can be selected in a variety of glazing styles, with more decorative glass being a beautiful option that also offers privacy. In contrast, a more transparent pane will allow more natural light to flow into your home, whilst offering clear views of the outdoors.

With Landmark Windows, you can also personalise your new front door glazing with your house number, blinds, and other forms of artistic glass.


A modern composite door is the perfect way to make your home the most eye-catching on the street, particularly if you utilise our range of designs.

As well as adding artistic glass and stand-out hardware, choosing the perfect colour is the ideal way to make you fall in love with the entrance of your home.

If you are looking for an authentic appearance, perhaps our Irish Oak timber-look colour is the perfect choice for you, with popular contemporary options including Chartwell Green, Duck Egg Blue, and Anthracite Grey.

About Landmark Windows & Doors

Landmark Windows & Doors are based in Plymouth, and we work across Devon and Cornwall serving our local community.

We are a FENSA-approved installation company, and should you opt for one of our products, you can rest assured knowing you’ll have a guarantee backed by Installsure.

As well as providing composite doors, we also offer popular windows such as casement windows, flush sash windows, and other uPVC and aluminium options.

When it comes to doors, bifold doors, sliding patio doors, and stable doors are among our most popular options.

We have a friendly customer service team of experts who are always happy to help and offer further information on 01752 283834, or at sales@landmarkws.co.uk.

Chartwell green composite door with curved glass window and double side panels