Composite Doors | Greenoak Concept & Design (2025)

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Composite Doors | Greenoak Concept & Design (1)

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.

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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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Door Designer

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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?

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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.

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Composite Doors | Greenoak Concept & Design (42) Rating

4.9

Based on 56 Reviews

Composite Doors | Greenoak Concept & Design (43)

Composite Doors | Greenoak Concept & Design (44)

Way Main Wong

05/11/2023

Good original consultation with Dale, general advice without being pushy. Survey efficient and quote broken down and understandable. Very good team from Greenoak, work done as per schedule, clean and tidy. Very considerate when one of us was unwell, kept the noise down. Problem with garage door investigated and rectified very quickly. Really pleased with final result, completely transformed external appearance of house. Thanks to whole team inc Tom Jay Mike Dave Callum Ed and esp Mark and Tegan.

Composite Doors | Greenoak Concept & Design (45)

Composite Doors | Greenoak Concept & Design (46)

Kitty Heyns

05/10/2023

Amazing service from start to finish.Wouldn't go anywhere else, highly recommend to anyone.

Composite Doors | Greenoak Concept & Design (47)

Composite Doors | Greenoak Concept & Design (48)

Danny Clark

05/10/2023

5 * very helpful and professional great service 👍 👏 👌 highly recommended.

Composite Doors | Greenoak Concept & Design (49)

Composite Doors | Greenoak Concept & Design (50)

Roman Clark

05/10/2023

This my second time using Greenoaks Conecept and design , I cannot vouch for them enough ! Dale and the team completed a very a high standard of work throughout on a few properties for me and would highly recommend to anyone looking .

Composite Doors | Greenoak Concept & Design (51)

Composite Doors | Greenoak Concept & Design (52)

Riversidezoe

05/10/2023

Dale and his team are amazing! I will use them again!

Composite Doors | Greenoak Concept & Design (53)

Composite Doors | Greenoak Concept & Design (54)

Mary Dean

27/09/2023

Highly recommend this company. Had our conservatory roof done and they did a fantastic job. They kept us informed every step of the way of what would be happening. Cleaned up at the end of each day and was very hardworking, polite and friendly.

Composite Doors | Greenoak Concept & Design (55)

Composite Doors | Greenoak Concept & Design (56)

Dale has been a star. From his first visit to give me a price, to completion of the works. Punctuality and communication of the Greenoak team (Dave/Ray/Callum) was excellent.I am so pleased with the job that Green Oak have completed for me. They were professional, tidy and worked so hard. The job is finished to a high standard and I will 100% use them again. Would highly recommend.

Composite Doors | Greenoak Concept & Design (57)

Composite Doors | Greenoak Concept & Design (58)

Maria Howe

07/09/2023

Job was done in the hours I was told. Very efficient and happy with my new conservatory roof. Thank you and would happily recommend Greenoak

Composite Doors | Greenoak Concept & Design (59)

Composite Doors | Greenoak Concept & Design (60)

alan shinn

05/07/2023

We recently had relacement windows and doors by Greenoak Concept. Many thanks to Dale and all the team,they are very professional, punctual, polite and leave the job in a clean and tidy condition. Very pleased with the outcome, many thanks to all at Greenoak.

Composite Doors | Greenoak Concept & Design (61)

Composite Doors | Greenoak Concept & Design (62)

Ian Trebinski

03/07/2023

Dale and the Greenoak team are fantastic; having delivered 2 large projects on our house, both on-time and on-budget (and with a laugh & smile!) we can’t recommend them enough! Thank you!

Composite Doors | Greenoak Concept & Design (63)

Composite Doors | Greenoak Concept & Design (64)

ian jefferies

29/06/2023

Professional job.

Composite Doors | Greenoak Concept & Design (65)

Composite Doors | Greenoak Concept & Design (66)

Nick Brennan

12/05/2023

So far very happy with the installation . Our tired old conservatory has been totally transformed by the team at Greenoaks. They worked cleanly and efficiently whilst navigating our day today running if the house. We’re actually looking forward to the heat of summer and cold of winter!!

Composite Doors | Greenoak Concept & Design (67)

Composite Doors | Greenoak Concept & Design (68)

Richard Earey

12/04/2023

Dale, you and your team, thank you so much for your time and dedication. Our new composite Rock door looks and feels fantastic. It feels really good using a local company that cares about their customer from start to finish.Thank you

Composite Doors | Greenoak Concept & Design (69)

Composite Doors | Greenoak Concept & Design (70)

John Dobinson

30/03/2023

We have had a solid roof put on our conservatory by Green Oak. We were very impressed from the outset. Dale took time to explain every aspect of the build bringing a model of the roof so we could see the construction. Then he left us think about it and there was no hard sell.The workmen were very pleasant, friendly and worked extremely hard. Despite being one man down the other chap worked late into the evening to make sure the construction was finished on time ( rather than have to come back for a couple of hours the following day), as did the man doing the plaster boarding. Every evening the site was left tidy and all rubbish taken away once the work was finished.The plasterer and electrician also did a brilliant job and all works was finished on time.We are really happy with the end result and couldn’t recommend the firm more highly.John & Rita Dobinson

Composite Doors | Greenoak Concept & Design (71)

Composite Doors | Greenoak Concept & Design (72)

Nicky Boosey

15/03/2023

Dale was very professional in giving us sound advice and explained the whole process from start to finish. The job commenced on time, Mike and Mark treated our home with respect and were very knowledgeable and kept us informed all the way along. The quality of work is excellent and we would recommend them.

Composite Doors | Greenoak Concept & Design (73)

Composite Doors | Greenoak Concept & Design (74)

Ian Creek

10/03/2023

We needed 11 new windows of various sizes so we spent some time searching reviews for a highly rated but local Double Glazing window installer. Greenoak came out top of our search results, We reached out and Dale responded quickly followed by a visit a few days after. The resultant quote was very competitive versus other quotes we had received. It was an easy decision to go with Greenoak.Dale came across as very knowledgeable, friendly and genuinely customer focussed. He invited us to the showroom in Leigh where he took us through the detail to ensure we were fully aligned on requirements and expectations. We were very impressed with him and his business and by his overall professionalism.The installation took place on 20th Feb 2023 and took 4 days in total. The whole process was exemplary, we could not fault the team in any way. They were tidy, considerate and very thorough. We have had windows fitted before by various other company's but the quality of fit and finish from the Greenoak fitters was far superior. The guys worked solidly and clearly did not skimp on anything, ensuring that the windows were not only properly fitted but sealed professionally too. They did an outstanding job including clearing all of the old windows and rubbishOverall we'd rate Greenoak at 10/10. We felt reassured by their high standards of work ethics, integrity and customer satisfaction. We honestly doubt there is anyone better out there for this type of work.We therefore wholeheartedly recommend themIan and Jenny

Composite Doors | Greenoak Concept & Design (75)

Composite Doors | Greenoak Concept & Design (76)

Deborah Wilson

04/03/2023

Fantastic job done by Greenoak, the guys were professional, friendly and a pleasure to have in my home. I couldn’t be happier with the job they did. Highly recommended.

Composite Doors | Greenoak Concept & Design (77)

Composite Doors | Greenoak Concept & Design (78)

Lisa Williams

23/02/2023

Brilliant company, very friendly and easy to work with. Very pleased with the finished cladding on our office wall - excellent quality and good value

Composite Doors | Greenoak Concept & Design (79)

Composite Doors | Greenoak Concept & Design (80)

Vic

04/02/2023

Replacement Conservatory Roof.Fantastic company and service from the whole team! Dale is great and gave me a quote for my new lightweight roof, great bloke and not pushy, loved the fact he gave a all in price rather than start low and add extras. The fitting team are fantastic!, Mike, Mark and Casper treated my home like their own, , great attention to detail and did everything I asked to get the perfect finish, I honestly cant find 1 fault and I am fussy! I could not be more happier with my roof!!Take my advice, Don't look anywhere else ,I cant rate them highly enough. Greenoak are the BEST!

Composite Doors | Greenoak Concept & Design (81)

Composite Doors | Greenoak Concept & Design (82)

Following our initial discussions with Dale, our expectations were already set high when it came around to installation. Some truly awful weather right at the start of the installation virtually wiped out the first two days work, and the anticipated seven day build seemed to be in jeopardy right from the start. But Mike and his crew - supplemented by two and sometimes three others, working in still inclement weather, brought the build back on schedule by the end of day five, and the plastering and electrical second fix over days six and seven meant the whole project was delivered to time, and budget meaning that our initial high expectations had even been exceeded. I have nothing but the highest regard for their workmanship and scheduling - and not forgetting Dione in the office who kept me informed throughout and efficiently managed the stage payments. In my experience it is unusual to receive a great sales pitch and then to have that exceeded by the installation teams - I couldn't recommend Greenoak's services more highly.

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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.

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Composite Doors | Greenoak Concept & Design (2025)
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