Just Doors & Conservatories

Composite Doors

All our solid core composite doors come with the following as standard:

  • Sculptured hard-wearing door frame
  • Heavy-duty stainless steel body hinges
  • Yale Lockmaster tested to British standard PAS23/24
  • Ultion cylinder approved by the Police
  • Sustainable timber sourced from managed forests
  • 77mm PVCu threshold with other options available
  • Multiple colour and glazing combinations
Build Your Own Door


Download our 2020 brochure

Our Solid Core Composite Doors lead the way when it comes to both style and security

Constructed from a laminated veneered timber called Kerto®, sixteen layers are used to provide strength and durability. In many doors, grain direction can be a weak spot with timber warping or even splitting. Our composite door construction ensures the woodgrain is running in different directions, thereby removing any potential weaknesses.

The Benefits of a Solid Core Composite Door

GRP Doors

Composite doors are typically made from a material called Glass Reinforced Plastic (GRP). A door will be comprised of two outer layers of GRP which are attached to either side of the doors sub-frame. The gap between the GRP layers is then filled with high-density foam. Only a small proportion of the finished composite door is manufactured from a solid material. The GRP layers are robust but can be susceptible to scratching and denting, neither of which are easy to repair. You may also find that some GRP door skins fade over time, especially those in direct sunlight.

Solid Core Composite Doors

As we’ve detailed above, our Solid Core doors are created using 16 layers of Kerto®, a laminated, veneered timber that is incredibly strong and dimensionally stable. Kerto® is used in a wide range of construction projects from new builds to renovation and repair projects.

The 16 layers of Kerto® are orientated, so the wood grain is running in multiple directions. This increases the strength and rigidity of the finished composite door and also offers significantly improved security. Our solid core composite doors and frames are both manufactured in Britain under strict BS EN ISO9001:2015 quality management systems.

Bonded to the Kerto® layers are two PVCu skins. PVCu is far more durable than GRP and is less prone to fading or scratching. The PVCu can be created with a highly realistic woodgrain effect or in a smooth finish. Both options are available in 24 colour variations.

For details of how to correctly measure for your new composite door please view our measuring guide.


Build Your Own Door

Solid Core Composite Doors – Key Features

Choice of Frames

Our solid core composite doors come complete with a sculptured frame with Chamfered available on request. The door frames are manufactured in a choice of 22 coloured foils as well as plain white or cream. For a more complete finish, the colour of the door frame can be matched to the door.

Threshold Options

The standard threshold is a 77mm PVCu with the option of a 57mm low threshold if required. We can also create a 24mm aluminium threshold which can be used in conjunction with a wheelchair ramp.

A Style for Every Home

From traditional to contemporary, you are sure to find a door style in our range that suits your property. We have panelled designs with curved glazing options in the Caunton and Maple ranges. For modern entrances, there is the Urban range that includes a choice of different glazing placement options. Whatever your style, we are sure to have a door that fits.

Sustainable Timber

We are passionate about the environment, and we appreciate the impact that manufacturing can have. We are very proud of the fact that all the timber we use is sourced from sustainably managed forests. What’s more, at the end of the composite doors life the wood can be recycled rather than being sent to landfill.

Picking a Colour

Perhaps the hardest part of choosing one of our solid core composite doors is picking the colour. Our range has 22 colour options, plus white and cream. If you wish, you can choose a different colour for the external and internal faces of the door to complement both exterior and interior colour schemes.

Fit and Forget

None of our composite front doors requires painting or any other maintenance. We recommend cleaning to keep them looking their best, which can be done in conjunction with having your windows cleaned.

Glazing Options

The glass in our solid core composite doors is supplied as double glazed with a standard B rating for energy efficiency. If you require triple glazing, you can select from the Zinc range, which includes a choice of design options. Each of our front door styles includes a selection of glazing designs. Depending on your requirement for extra light or privacy, you can decide on how translucent you want the glass to be. To add a personal touch to your front door, you can include coloured glazing or a house number.


When creating a new front door, it’s an excellent opportunity to personalise and brighten up the entrance to your property. From new side panels to a perfectly placed letterbox, these final details can make all the difference. We offer an extended range of traditional, heritage and architectural door furniture in a wide selection of colours. With options for auto slam locks and stainless-steel bar handles your door will be truly bespoke to you.

Side Panels

When installing a new composite door, it is a good opportunity to consider replacing or adding side panels. Side panels can improve the appearance of the property, and with the addition of glass, extra light can brighten up the inside doorway. Depending on your location, you can select clear glass to make the most of a good view or an obscured glass for privacy. The side panel can match the colour and finish of the front door, or you could choose to install something different as a contrast.


The type of door handle you select will depend on personal preference and style. Our range of door handles has been developed to coordinate with all our door designs. The Balmoral range has a classic style that works well with a wide variety of our solid core composite doors. You can select from a slimline handle with its elegant looks or a pad handle that is easier to hold.

The ‘Sweet Design’ handle has been specially developed to provide an extra level of security. The mechanism is highly resistant to snapping and comes with a 20-year anti-corrosion guarantee. All our door handles are available in a choice of colours that can be coordinated with the rest of your solid core door furniture.


The door hinges we use have been developed to ensure the perfect fit and functionality. When ordering your solid core door, you have two hinges options.

The standard solid core composite door hinge has a 2-way adjustment and is manufactured from heavy-duty stainless steel. This hinge is fixed to the door face and automatically sets the correct compression. The slimline cover is quick to remove and are available in nine colour options, including white, black and metallic finishes.

The Trojan has full adjustability to ensure the perfect fit for a high-quality finish. With simultaneous vertical adjustment across all hinges, even load distribution is easily achieved. The Trojan hinge is available in 6 different colours options.

Door Knockers

With so much choice for front door alert systems, you may decide you don’t need a door knocker. However, the front door knocker is something of a British tradition. First used by grand homes as a sign of wealth and status, a door knocker has become a popular feature. Our range of door knockers offers both traditional and modern styles for that perfect finishing touch.

The popular Urn style knocker is available with or without a viewing hole and has a wide selection of colour options. The slimline Architectural and ‘Sweet Design’ knockers fit seamlessly onto our modern solid core composite door style.

Bar Handles & Escutcheons

Bar handles are a modern door style feature that provide a stylish, sleek look when paired with our Urban and Contemporary door ranges. When used in conjunction with a slam locking system, they create a highly functional and secure front door. Choose from bow or inline shaped handles, manufactured from austenitic grade 304 stainless steel which is highly resistant to corrosion.

Escutcheons are keyhole covers or shields. They are used to surround a keyhole if it is not part of a door handle. You can choose from a standard escutcheon that surrounds the keyhole with a flush finish or a cylinder pull which includes a lip to help with pulling the door closed.


An important feature of the front door is a letterbox. In all the excitement of selecting your doors style and colour, you may forget this crucial detail. Depending on the type of door you have selected, the letterbox can be positioned in the centre, or base of your solid core composite door. A letterplate is required to cover the letterbox to protect your home from draughts and for security. We have four different styles to choose from in a range of finishes. The Nu Mail option can be fitted with a shield for an extra level of security.


As part of our composite door ordering process, you may choose to select the ‘Secured by Design’ feature. This is a police initiative that ensures the front door meets all the required standards for optimum security. When you choose this option, your front door design will automatically select laminated glass. The laminated glass has been developed to withstand the force of a brick being thrown at it. During the ordering process, the highest security rated locks, a door chain and a spyhole feature will also be recommended to you.


The multi-lock systems we build into our solid core composite doors have been selected as they provide the highest level of security available on the market today. You have the choice of four different lock types.

Yale Lockmaster
  • Incorporates two hook locks with a centre latch and deadbolt.
  • The gearbox has a unique ‘slider’ technology for a long-lasting, smooth movement.
  • The Yale Lockmaster is accredited by the ‘Secured by Design’ initiative and tested to British standard PAS23/24.
Winkhaus Heritage
  • Slam shut lock.
  • It has the appearance of a traditional rim latch but incorporates the latest high-security multipoint lock which activates automatically once the door is shut.
  • Contains two anti-push back hooks with centre latch and deadbolt.
GU Security Automatic Lock
  • Slam shut system with a spindle position that gives you an extra choice of handle location.
  • Registered with the ‘Secured by Design’ initiative.
  • Has three deadbolts and a centre latch.
Yale Conexis
  • A smart lock which can be used with most 92mm centred multi point door locks.
  • This is a keyless system which you configure, control and unlock from your smartphone via the secure Bluetooth app.
  • You can alternatively use a key card or key tag to open your solid core door.


The cylinder part of your locking system is one of the most critical security features. The Ultion cylinder locks that we install to our solid core doors are approved by the Police and master locksmiths. Ultion cylinders have the highest kitemark star rating and have been described as ‘the most secure lock ever made’.

Ultion cylinders have passed rigorous tests, and the Brisant-Secure who makes the product is so confident in their security, they offer £2000 if an intruder burgles after gaining entry by snapping an Ultion. If an attempt to damage an Ultion system is started, a lockdown mode is activated. This mode involves the initiation of 20 anti-drill rods made with a material called molybdenum which is 25% denser than iron.

Since the Security Guarantee was introduced we’ve seen loads of break-in attempts where Ultion protected homeowners by beating intruders. So we felt it was time to reflect this proven confidence. Even on locks with the existing £1000 guarantee card all homeowner guarantee registrations have been uplifted to £2000. The new Ultion 3 star Plus marking represents the enhanced security and durability performance of the With Extra Molybdenum (WXM) build.

Fire Doors

For extra safety and security, we also supply a range of fire doors that have been tested and pass the latest fire door standards BS476-22. All features of our fire doors, from the glazing to the locks, have been tested for safety and security. We can also supply our fire doors with automatic door closing mechanisms if required.

Solid Core Composite Doors – Design Your Own

So now you know all about our solid core composite doors features and design options it’s time to get building your own door.

For more information, you can also download our 2020 brochure by clicking here.

If you have any questions, the team at Just Doors and Conservatories will be happy to help.

Build Your Own Door


Solid Core Composite Doors FAQ’s

Yes, our ‘online door builder’ allows you to select your preferred door style from our wide range of composite doors and then add the accessories and security features you require. You can find the door builder by clicking here.
You can order your solid core composite doors directly from our website or by contacting our sales team. Our contact details can be found here.
Our solid core composite doors are made from a laminated veneered timber called Kerto. The doors core is constructed of 16 layers of Kerto with the woodgrains running in different directions to increase the durability of the door. We cover the timber core with two PVCu skins. PVCu is a durable material that is resistant to fading and scratching.
Most composite doors are covered in a material called Glass Reinforced Plastic which is commonly abbreviated to GRP. GRP composite doors are prone to fading, especially if positioned in direct sunlight. GRP composite doors can also be easily scratched and dented. At Just Doors and Conservatories our entire door range is covered in a material called PVCu. This is a lightweight but very robust form of plastic that won’t fade in direct sunlight and can withstand the most extreme weather conditions.
Solid composite exterior doors have many advantages for homeowners. They are very low maintenance, provide peace of mind thanks to their high-security rating and have excellent thermal efficiency, which means they are energy efficient and great at keeping your home nice and warm. Another benefit is the range of composite door colours available. Whether you’re looking for duck egg blue, Chartwell green or bright pink, you’ll be able to find the right colour for your home. A Upvc door also offers high security, low maintenance and good thermal efficiency. However, the range of door colours and the finishes are minimal.
Yes, we offer nationwide delivery; however, delivery costs may vary depending on your location. For further details, please contact us.
All of our composite doors are made from timber sourced from sustainably managed forests. Unlike most front doors, you can also recycle our timber core doors at the end of their life.