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Plastic Decking Sub-Frame FAQs

Recycled plastic joists are a durable, long-lasting alternative to traditional timber joists. They are made from 100% recycled plastic, engineered to provide a strong and stable support structure for projects like decking, sheds, and garden rooms. They will not rot, split, or crack.

The primary benefit is longevity. Unlike timber, recycled plastic joists are completely waterproof and resistant to rot, damp, fungi, and insect attacks. This means they will not degrade over time, providing a 'fit and forget' foundation that will outlast any timber equivalent.

Yes, absolutely. They are engineered to be incredibly strong and rigid, providing a robust and stable base for decking and other outdoor structures. We use them to ensure the foundation of your project is as long-lasting as the high-quality decking we install on top.

Recycled plastic joists are designed to last for decades. Because they are immune to the elements that cause timber to fail, they have a life expectancy of 50 years or more, ensuring your investment is protected for a lifetime.

Our joists are made from 100% recycled plastic materials that would otherwise end up in landfill. By choosing them, you are supporting a circular economy, reducing plastic waste, and preventing the need to harvest new timber.

Yes. The plastic is chemically inert, meaning it will not leach any harmful chemicals or toxins into the surrounding soil or environment. It is a safe and stable material for use in any garden setting.

Yes. At the end of their very long life, our recycled plastic joists can be recycled again, contributing to a closed-loop system and further reducing environmental impact.

Definitely. Their strength and durability make them an ideal subframe for a wide range of applications, including garden rooms, sheds, raised planters, walkways, and any outdoor structure that requires a solid, rot-proof base.

Yes, one of their biggest advantages is that they can be laid directly onto the ground, gravel, or grass without any risk of rotting or water damage. This makes installation quicker and simpler compared to timber, which requires raising off the ground.

They can be cut, drilled, and screwed into using standard woodworking tools, just like timber. This makes them easy for our professional teams to work with during installation.

Like most building materials, plastic joists will experience some thermal expansion and contraction with temperature changes. Our expert installation team understands this and ensures the correct spacing is used during construction to allow for this natural movement.

Recycled plastic joists are solid and dense, making them heavier than a comparable piece of softwood timber. This density contributes to their strength and durability.

None. Once installed, they require zero maintenance. You will never need to treat, paint, or seal them. They provide a completely maintenance-free foundation for your project.

Yes. Plastic is completely unappealing to wood-boring insects, termites, and rodents. Your subframe will remain structurally sound and free from pest damage.

They are the perfect solution for the UK climate. They are 100% waterproof and will not absorb moisture, swell, or warp, even in constant contact with damp ground or in areas with poor drainage.

The initial material cost for recycled plastic joists can be higher than for standard treated timber. However, they represent far better value over the long term. Because they never need replacing or maintaining, the total lifetime cost is significantly lower than wood.

We are committed to building high-quality, long-lasting outdoor spaces for our clients. Using a rot-proof plastic subframe ensures the foundation of your project is as durable as the premium decking and materials we use on top, guaranteeing a structure that stands the test of time.

Yes, our recycled plastic joists provide a suitable and stable subframe for all types of decking, including composite, PVC, and traditional timber boards.

The material itself comes with a manufacturer's warranty, reflecting its exceptional lifespan. At OMG, we guarantee our workmanship, and using superior materials like plastic joists allows us to deliver a final project that we can stand behind with confidence.

Simply contact the Outdoor Makeover Group. Our team will discuss your project, explain the benefits of using a plastic subframe, and provide a detailed, no-obligation quote for a superior, long-lasting installation.

Why Choose OMG
5 Star Service
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Based in the South West
Fully Project Managed
Up to 25 year Guarantee
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Get Your Free, No-Obligation Quote Today

Expect a seamless experience when you request a quote from Outdoor Makeover Group. Whether you’re planning to transform your outdoor space, upgrade your driveway, or enhance your home, we’re here to make the process simple and stress-free.

It’s as easy as 1, 2, 3—enjoy! OMG offers a no-fee, no-obligation survey to help you get started. Contact us today to book your free on-site consultation, where we’ll provide a personalised quotation and design service tailored to your needs—all with no cost and no commitment.


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Proven Expertise You Can Trust

At OMG, we complete 15 to 25 projects every week, showcasing our dedication to quality and efficiency. From driveways to garden transformations, our experience speaks for itself. With every project, we aim to exceed expectations and deliver results that stand the test of time.

Skilled Teams, Exceptional Results

Our fully employed teams are specialists in their fields, ensuring every job is completed with precision and care. We don’t just meet standards — we set them. When you choose Outdoor Makeover Group, you’re choosing a team that’s passionate about turning your vision into reality.

5-Star Service, Every Time

With only 5-star reviews, OMG is the trusted name in outdoor home improvements. Our commitment to quality, customer care, and attention to detail has earned us the loyalty of countless happy clients. Visit Outdoor Makeover Reviews to see why we’re the best choice for your project!

We’re committed to 5 star service

See what our customers say …

Hilary O'Nions - Google
19th June 2025

We are very pleased and delighted that we chose OMG to renew our old concrete garden path with bonded resin. The job was swiftly arranged with very courteous and friendly communication with the office. Junior and Francis worked fast in a professional way with hardly a break, and the path was transformed. They were friendly and communicative and explained everything they were doing. It is a good experience to walk on it now as it is comfortable and safe.

Christine Willis - Google
20th March 2026

We have just had our second project completed by OMG. We have now had decking installed and now have wonderful new driveway gates. Both projects were completed without a hitch and everything was organised promptly, efficiently and in a very friendly manner by Ruth and Naomi. E-mails and telephone calls were received updating us on how the project preparation was progressing and suggesting installation dates etc. On the agreed day Ely, who completed our previous project, returned to carry out the work. Ely was as efficient and cheerful as always and completed the job within the day. The gates look tremendous, and are of good quality. Thank you to the whole OMG team.

Eric Ankers - Google
2nd October 2025

very pleased 10 out of 10 from start to finish,the visit to show room.staff very professional once plan agreed quick start date.the staff carrying out work highly skilled and pleasant finish superb and cleaned up site.can recommend highly

Margaret - Google
19th September 2025

OMG recently erected a composite fence at the rear boundary of my property. Every help and advice was provided by Ed and the survey and quote was free. The operatives, Tristan and his assistant arrived promptly on time and were courteous and considerate, kept me informed during the process to make sure I was happy. They worked incredibly hard and the completed job looks amazing. Everything was left clean & tidy, with all waste removed. (I am an OAP and they moved everything for me where necessary.) Also Naomi in the office was super efficient and helpful. I am delighted with the end result. Thank you OMG!

Lesley Hockin - Google
23rd March 2026

I am absolutely delighted with the driveway which just looks amazing. The two contractors on site for the makeover were absolutely fantastic and such hard workers. They were really thoughtful, polite and a pleasure to have around. The other lads that came in to do the brickwork were also fantastic, and I would recommend the Outdoor Makeover Group to anyone who wants a decent job done, in the timeframe promised and at the price quoted. A shout out to the office personnel at the end of the phone. All so lovely and helpful, and that counts for so much in this world.

Peter Pentecost - Google
10th September 2025

Top class service from booking an estimate to the completed job. The new artificial lawn looks amazing. Kept us informed at every stage, clean, efficient and top quality job, would recommend to everyone

Eva T - Google
10th March 2026

Efficient and experienced workmen, Rob and Nathan, worked hard and left everything tidy. On the phone, Naomi was a friendly and reassuring voice. The drive looks great, just have to keep the pesky seagulls away!

Mr Pearce - Google
21st July 2025

The Team from OMG turned-to for the three project's at the time specified / agreed upon. Composite Fencing. Composite Decking, and Resin driveway / hardstand. Their work was thorough, as well as professional. Recommend this company to all, right down to the backroom staff to the 'up-front' on location workers.

P Sloman - Google
22nd April 2025

From first contact at the office, to the surveyor, and the gentlemen who installed our decking and balustrades, the whole process was easy, carefree and affordable. Everyone we dealt with was kind, friendly and knowledgeable. We couldn't be happier with the end result; it is just what we wanted. Payment was taken in stages so we always felt that OMG was a credible and safe company to deal with. Highly recommend!

Luke Hagan - Google
7th February 2026

After years of trying to find people to renovate our balcony we finally came across the Outdoor Makeover Group and I'm so glad we did. Every step was really easy, professional and well communicated. Visiting the showroom answered any questions I had, and the finished product is absolutely top quality. Highly recommend.

Pete Long - Google
27th May 2025

What a great experience! Right from first visiting the showroom , to the site visit and then the installation, we couldn't have asked for better. The products are top quality but it is the people that make it even better. They were all friendly and helpful, very good at their jobs, great communication throughout and gave great advice too. Special mention to Ed for the design and quote, Liam and Gabe who were our brilliant installers and a shout out for Naomi in the showroom who kept us informed, dealt with all our queries and couldn't have been nicer. Thoroughly recommended!

Martin Jones - Google
11th June 2025

Well.what can I say, as you can appreciate it's alot of money to have a drive makeover, so choosing the right company was paramount, after finding OMG on the net and reading the reviews I knew this was the right path for our journey, The care and professionalism was felt right from the start,from the initial survey to the final fantastic transformation they carried out, nothing was too much trouble, a big shout out to Edd,Gareth, naomi and shane and the rest of the team, we will definitely recommend you to all our family and friends,

Alan - Google
23rd July 2025

After visiting the Showroom and, seeing the product, we were confident that we were making the right choice. From the Surveyor visiting to the last piece of decking being fitted everything ran like clockwork. The people installing the decking kept us informed of what they were doing as the project progressed and, did a first class job. Very professional and polite. I would highly recommend OMG as the go to people for anybody thinking of having work done, like us, you won't be disappointed.

Steve Tozer - Google
8th April 2026

We are very happy with the decking project OMG have done for us. Liam and Gabe were both craftsmen and finished the job to a high standard. They was punctual, friendly and professional. Thanks OMG for a fantastic job! Highly recommended.

Nigel - Facebook
27th May 2025

Very pleased with the transformation and not often im speechless but the team deliver beyond normal and you should be proud of omg its awesome from the starting experience to the end . Good trade is so hard to find these days

Lesley - Google
3rd June 2025

Lesley Cooper I had done a lot of research with regard Resin, there were an awful lot of companies out there, and not always the best, but I have to say from the moment we visited the showroom, we were made to feel very welcome from the very beginning. The product display and choice was second to none, there was no pressure selling, and we were made to feel very at ease and to think about our choices. Ed and the team were amazing, Naomi was always ever helpful in the office with any questions I had, I expect the poor girl had had enough of me with all my questions!! we chose well, the team came down to install artificial grass, fencing and resin, from the moment the team arrived, they did not stop, I have never known a bunch of lads work as hard as they did, it made a refreshing change not to have to listen to what they had done the night before! nor was there any swearing! it was just so lovely that a group of blokes could get on so well, and work as a team, and as for the lads which came down Saturday they just bounced off each other, and enjoyed a bit of banter which was lovely to see and hear. I wouldn't hesitate to recommend OMG to anyone, they are a highly motivated professional team who offer value for money and a product which is second to none, so thankyou OMG for all your help, you are truly amazing and our garden looks like a show home.

Bob - Google
7th April 2025

Absolutely amazing transformation from start to finish. The workmen kept me informed as they worked turning my garden around. Can highly recommend OMG. Will certainly deal with them again in the future.

Suzanne King - Google
13th November 2025

What can I say about the Outdoor Makeover Group other than OMG! These guys were fantastic. They completed a challenging multi-tiered decking project for me, having to work round a previously installed swim spa, and on a sloped garden. The consultation and design process was easy and the ideas shared by the team ultimately transformed my garden - thank you Ed! The build itself was also handled brilliantly - the team were exceptionally hard working, thorough and great to deal with on the day to day decision making, needed for such a large project. A shout out to Liam, Tae, Mark and Gabe for their hard work, patience with awful weather and good humour. I could not have wished for a better result, or team to work with on my project, and have no hesitation in recommending OMG to anyone looking for garden design and build services. Thanks OMG!

Steve Toms - Google
23rd October 2025

An incredible experience from start to finish. Everybody was so professional and helpful and brought our dream to reality. Thank you everybody at OMG.

Banster Boy - Google
18th March 2026

Kitchen and wardrobes makeover and very pleased with the high standard of work completed / final finish . Staff involved were respectful and pleasant to deal with etc .