Composite Doors By Greenoaks

Prestige Composite Doors by Greenoaks

Greenoak Concept & Design provides two composite doors, Rockdoor and Distinction, both are one and two as market leaders respectively. The thickness of the doors means that not only is it robust, but also highly energy-efficient due to the volume of insulating foam and timber inside, or in the in the case of Rockdoor “Steel”.

Greenoaks composite doors are available in all popular front door colours to suit any age and style of house. From contemporary anthracite grey to classic black, through to deep greens and blues. You can also choose to be bold with a dash of colour from striking pinks and yellows to really set your home apart.

What is a composite door?

A composite door is a combination of different materials to make a stronger, more durable door. The internal frame is made with steel reinforced rods for extra strength. The external skin is made from a layer of interwoven Glass Reinforced Plastic (GRP), also known as fibreglass – it’s exceptionally tough, weatherproof, and is moulded perfectly to replicate a wood grain.

Inside the door is injected with a thermal polyurethane foam core and offers excellent heat-retaining A-rated insulation with an A++-rated triple glazed option available.

Composite doors are made with the colour infused with the outer layer, so scratches don’t show and colours don’t fade. This style of door is hard-wearing, virtually maintenance-free and keeps looking its best for years.

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Over 3000 Potential Colour Combinations

White. Cream. Rosewood. Chartwell Green. Irish Oak. Anthracite Grey. The fenestration industry has witnessed a revolution of colour throughout the last decade – and it shows no signs of stopping. The days of property owners requesting a full suite of white windows with matching white doors and a conservatory are much less prevalent than before.

Order forms are now filled with requests for windows foiled in all colours of the rainbow, with woodgrain, patterned or shimmer effects, many wanting two different colours for frame and sash.

We’ve entered the age of personalisation at every level – and homeowners are demanding more choice than ever – so what if we told you one PVCu systems company is able to offer almost 3,330 different colour combinations within just 7 days, with thousands more on longer lead times?

Why choose a Composite Door?

Our Most Secure Doors

Greenoaks composite door offers peace of mind because each one is packed with security measures to keep your home secure. The skin is a super tough multi-layered GRP, with an anti-saw security mesh layer and a multipoint, 3* locking cylinder incorporating anti-pick and anti-drill protection. Added to this is an internal steel reinforcement, and a special hinge bolt to stop the door from being lifted off its hinges. We’ve left nothing to chance where security is concerned.

Energy Efficient & Weather-Proof

Greenoak composite doors achieve excellent energy efficiency, with an A++ option available and triple glazing as standard. All our doors will ensure your home retains more of the precious heat inside. Additionally, we use the very best materials to ensure year-round protection against the elements and to avoid colour fading.

Greenoak Concept & Design

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Greenoak Concept & Design have been raising the standards for more than 14 years.

More about us: We’re an independent Essex-based specialists in high quality UPVC Windows, Doors, Tiled Conservatory Roofing, Wall Cladding, and Fascias, Soffits and Guttering.

FREE ONSITE QUOTATION

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Composite Doors Frequently Asked Questions

Rockdoor and Distinction are the UK’s two market-leading composite door brands, and we supply both. Rockdoor is known for its steel-reinforced core, while Distinction offers a similarly robust construction with its own range of styles and finishes. Our team can talk you through which suits your home and budget during your free quotation.

Pricing depends on the door style, glazing design, hardware, and colour finish you choose, bespoke colours and glazed panels will affect the final price. Get in touch or use our Door Designer tools above to build your ideal door and request a quote.

Yes. Every composite door includes a super-tough multi-layered GRP skin, an anti-saw security mesh layer, internal steel reinforcement, a multipoint 3-star locking cylinder with anti-pick and anti-drill protection, and a special hinge bolt to stop the door being lifted off its hinges.
Our composite doors achieve A-rated insulation as standard, thanks to the thermal polyurethane foam core, with an A++ rated triple-glazed option available for even better heat retention.
Yes. All our composite doors are backed by an insurance-backed guarantee via Certass and Homepro, and are Secured by Design and PAS24 accredited for extra peace of mind.

Thank You For Your Continued Support

Due to high demand, we are now accepting bookings for December 2026 installations, with our diary also open for 2027 projects.
As a special thank you to both our new and existing customers, we’re offering an exclusive: