Best Composite Doors In 2024

Published: 6th February 2024
Updated: 22nd February 2024


Are you looking for the best composite doors in the UK? There are many brands that make composite doors, and let me tell you they are not all created equal. This blog post will help you understand who offers the best composite doors in 2024. We’ll look at things like how long they last, how they look, how well they keep heat in, and how safe they are, as well as the customisation they offer and some rough price ranges.

However, there is 3 brands that are considered top of their game, so we will compare Rockdoor vs Endurance Doors vs Solidors in the post.

What is a composite door?

Composite doors are made from a blend of materials such as PVC, wood, insulating foam, and glass reinforced plastic. This mix of materials gives them their unique properties. Here are the key benefits of composite doors:

  1. Security: The strength of composite doors makes them a tough barrier against break-ins.

  2. Durability: These doors can withstand different weather conditions and have a long lifespan.

  3. Insulation: Composite doors are great at keeping your home warm and quiet. They prevent heat from escaping and block out outside noise.

  4. Style: With a huge range of designs and colours, you can find a composite door that matches your home’s look.

In short, composite doors offer a balance of security, durability, insulation, and style, making them a popular choice for many homeowners.

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Factors to Consider When Choosing a Composite Door

When choosing a composite door, what should you look for? Here are some key factors:

  1. Durability: How long will the door last? A good composite door should be able to withstand different weather conditions and have a long lifespan. For the best overall quality, Rockdoor is a great choice.

  2. Design Variety: Do you want a door that matches your home’s style? Solidor and Endurance Doors offer a wide range of designs and styles. They also offer the most colours, giving you plenty of options to choose from.

  3. Thermal Efficiency: How well does the door keep heat in? A thermally efficient door can help keep your home warm and reduce energy bills. Rockdoor is known for its excellent thermal efficiency.

  4. Security Features: How safe is the door? The best composite doors offer strong security features to protect your home from break-ins. Again, Rockdoor stands out for its security.

  5. Accessories: Looking for doors with the best and widest range of accessories? Solidor and Endurance Doors have got you covered.

  6. Price: Lastly, consider your budget. The three brands - Rockdoor, Solidor, and Endurance Doors - all fall within a similar price range so this should not be a key factor for your decision.

So, what matters most to you? Is it the design, the durability, the thermal efficiency, or the security features? Remember, the best door for you is the one that meets your specific needs and preferences.

composite rockdoor illinois
composite door rockdoor cottage

Do composite doors warp?

This is a very interesting topic. The short answer is yes, however thats not the full story, as some warp more than others and cause major issues, however there is a particular brand that has a 3mm warp tolerance and does not cause any issues. Lets starts with reason why a composite door may warp:

  1. Excessive Heat or Coldness: Composite doors are designed to withstand a range of temperatures, but extreme heat or cold can potentially cause warping. This is especially true if the door is exposed to direct sunlight for prolonged periods, which can cause the door to expand and contract. Similarly, in extremely cold conditions, the contraction of materials can lead to warping.

  2. Not Lifting the Hooks: Some manufacturers claim that not lifting the hooks when closing the door can lead to warping. I personally have not seen any evidence to substantiate this claim but it is one some popular brands like to use as an excuse.

  3. Moisture (Timber Core): While composite doors are designed to be resistant to moisture, in certain conditions, moisture can still penetrate the door. This is particularly true if the door has a timber core. When timber absorbs moisture, it can expand, leading to warping and swelling.

So now we know some of the reasons why composite doors warp, how bad is it? Well for some manufacturers, specifically the cheaper standard composite doors, it can be so bad you cannot open, close, lock or unlock the door which is far from ideal, this alone is one of the reasons we do not deal with cheaper composite doors.

I have had calls to visit customer’s houses who have had certain brands of timber composite doors fitted by somebody else and their door has warped more than 10mm, making it extremely difficult to lift the hooks to lock the door. This for a customer is a nightmare, and likewise for an installer.

So, with that out of the way, there is only one composite door that I know of that has a bow tolerance of 3mm, and it may warp by about 2mm overall, however, this does not cause the door any problems whatsoever and is something that you would not even notice and is the reason we are 100% confident when we supply and fit them.

The Best 3 Composite Door Brands

The best 3 composite door brands in the UK are:

  • Rockdoor

  • Endurance Doors

  • Solidor

rockdoor newark
composite door rockdoor vermont


Rockdoor are the best composite doors in our opinion, which is why we love fitting them. We have been dealing with them for over 12 years and their customer service and our relationship with them is fantastic.

  1. High-Density Core: Rockdoor composite doors feature a high-density core which is 60% stronger than standard composite doors.

  2. Solid Steel Hook Locks: These locks add an extra layer of security, making the door incredibly difficult to breach.

  3. S-Glaze Technology: Glass is built directly into the door, meaning it cannot be removed, improving security, thermal efficiency and sound insulation

  4. Aluminium-Reinforced Innerframe: The perimeter of the entire door is reinforced with aluminium, increasing strength and having a bow guarantee of just 3mm! 

  5. 50mm Thick Door Sash: Filled with a thermally efficient and incredibly insulating Polyurethane Foam core.

  6. 3mm High Impact Skins: This feature contributes to the door’s durability and strength.

  7. Thermal Performance: The thermal performance of Rockdoor is increased by the unique S-Glaze technology, eliminating drafts that often come in through the glazing aperture.

rockdoor steel mesh security
rockdoor lock cylinder

Endurance Doors

  • Solid Timber Core: Endurance Doors feature a solid timber core that is made from 17 layers of laminated veneer lumbar. This core enhances the door’s durability and strength.

  • Exceptional Durability: Endurance Doors are known for their exceptional durability, able to withstand various weather conditions and daily wear and tear.

  • Enhanced Security: The solid timber core also contributes to the door’s security, making it a tough barrier against break-ins.

  • Insulation: With their solid core, Endurance Doors offer excellent insulation, helping to keep your home warm and quiet.

  • Design Variety: Endurance Doors offer a wide range of designs and styles, as well as a variety of colours, allowing you to find a door that matches your home’s aesthetic.

  • High-Quality Accessories: Endurance Doors also offer a range of high-quality hardware accessories for a beautiful finish.


  1. Solid Timber Core: Solidor doors are built with a solid timber core, making them strong and durable, however they do not use laminated veneer lumbar like Endurance Doors

  2. 48mm Deep Doors: Solidor doors are 48mm thick, enhancing their security and energy efficiency compare to some other composite doors.

  3. Colour Combinations: Solidor offers a wide range of colours, with 19 different colours available.

  4. High-Quality Accessories: Solidor offers a range of high-quality hardware accessories for a beautiful finish.

  5. Security: Solidor doors feature unique Avantis locks, which are known for their high security. They also offer other high-security locking mechanisms for different types of doors.

  6. Thermal Efficiency: Solidor doors are designed to be energy efficient, helping to keep your home warm.

rockdoor vogue haze slate grey
rockdoor english cottage white worksworth


In our journey through the world of composite doors, we’ve explored three top brands in the UK for 2024: Rockdoor, Endurance Doors, and Solidor. Each brand has its unique strengths and reasons for considering, but these three brands are the most popular composite doors in the UK, and arguably the best composite doors in the UK.

As someone who has experience with all three composite doors from an installers perspective, Rockdoor composite doors are the brand I would put above the rest of the other brands.

Rockdoor stands out for its overall quality, offering high-density doors with excellent thermal efficiency and security features. Endurance Doors impress with their solid timber core, exceptional durability, and design variety. Solidor, with its solid timber core and wide range of colour combinations, offers both strength and style.

Choosing the right composite door comes down to your specific needs and preferences. Whether it’s durability, design variety, thermal efficiency, or security features, these brands offer a range of options to suit different requirements.

Why Choose Us For Your New Door?

In your quest for the best composite doors, you deserve a service that brings your vision to life. With our 15 years of expertise, we guide you seamlessly through the selection process.

Our commitment to transparency and honesty ensures you’re well-informed every step of the way. We’re here to answer all your queries and ensure you know precisely what you’re investing in.

But our service doesn’t stop at selection. The installation process is crucial to the functionality and operation of your door, as per the manufacturer’s design. At Very Secure Doors, we pride ourselves on our meticulous installation process. We scrutinise every detail, adhering to our high standards, so you can have peace of mind knowing your door is installed to perfection.

  •  Family run business

  •  Low overheads

  •  Competitive prices

  •  Excellent service

  •  Honest transparent advice

  •  No sales pressure or calls

  •  Full manufacturers warranty

  •  Fast lead times

Importance of a professional installer and supplier

Just before we delve into the frequently asked questions, it’s crucial to highlight two factors that are often overlooked but are more important than everything we’ve discussed so far:

  1. Finding the Right Supplier

  2. Getting a Professional Installation

The guarantee of your composite door lies with the supplier. It’s them you’ll need to turn to if you have any issues with your door, wether that is an adjustment, or replacement part under warranty. Therefore, it’s essential to choose a supplier with a good track record, positive reviews, and a well-established presence. Remember, if they go out of business, so does your guarantee.

As for the installation, it’s not just about getting the door fitted. It’s about getting it fitted right. A good door fitted badly is, in essence, a bad door. So, find an installer who cares about the small details, someone who is a perfectionist, takes their time, and does not rush the job. This attention to detail will help improve the longevity of your door and ensure you get the most out of your investment.

So, as we move forward, keep these two factors in mind. They could make all the difference in your composite door experience.

Get A Quote

Get in touch with us today and let us know your requirements and we can send you a free no obligation quotation for your Rockdoor

rockdoor vogue

Get A Quote

Get in touch with us today and let us know your requirements and we can send you a free no obligation quotation for your new project and a 100% accurate price.

Frequently Asked Questions

A composite door is a type of door made from a blend of materials such as PVC, wood, insulating foam, and glass reinforced plastic. This mix gives the door unique properties like improved strength, durability, and thermal efficiency.

Composite doors offer a balance of security, durability, insulation, and style. They’re strong, long-lasting, energy-efficient, and available in various designs.

Rockdoor stands out for its premium quality doors, excellent thermal efficiency, and strong security features.

Consider factors like durability, design variety, thermal efficiency, colours, accessories, security features, and price.

Composite doors are designed to be durable and can last for several decades with proper care and maintenance.

Yes, composite doors can be painted, but this will likely invalidate the manufacturers guarantee. It is best to check with your supplier.

Composite doors generally offer better insulation, durability, and require less maintenance than wooden doors. However, the choice between the two often depends on personal preference and specific needs.

The cost of a composite door can vary depending on the brand, design, and additional features. It’s best to check with the specific supplier for accurate pricing but typically this will be onwards of £1,300 including VAT and installation.

From our experience, cheaper composite doors can fade, however the likes of higher end Rockdoor, Solidor or Endurance Doors do not fade over time.

Composite doors are relatively low maintenance. Regular cleaning with a soft cloth and mild soapy water can help keep your door looking its best, and we also recommend to hoover and clean the bottom part of the frame called the threshold every once in a a while.

Yes, all composite doors do move slightly but its about minimising how much they move, for example a Rockdoor has a bow tolerance of 3mm, which will not affect the door operation in the slightest. We have seen some composite doors warp over 10mm whereby closing and locking the door is a struggle.

Yes, composite doors are known for their high security. They are robust and often come with 3-star high-quality locking systems. Rockdoor is the most secure composite door.

Composite doors are highly energy efficient. They offer excellent insulation, helping to keep your home warm and potentially reducing energy bills.

Yes, many composite door brands offer a range of customisation options, including colours, designs, and hardware accessories.

Very. The guarantee of your new composite door lies with your supplier, so you want to make sure they are reliable, have excellent reviews, well established and offer great customer service.

Very. A composite door is only as good as it's been fitted, and the tolerances are very small so you need someone who takes care, looks for perfection and does not rush the installation.