Timber Decking Replacement in South Wales
Your deck looked good when it went down. That was ten years ago. Now it's grey, splintery, and you've spent another weekend treating boards that'll look tired again by November.Replace it once with Trex composite decking and never touch it again. No treating. No painting. No splinters. Just a deck that holds its finish for decades.
TrexPro Gold installer.
12+ Years Experience
5-star rated on Google
Why South Wales Homeowners Are Replacing Timber Decking With Composite
Timber decking and Welsh weather are a bad combination. Regular rain, cold winters, and damp springs mean that even well-maintained timber decks start to show their age within a few years. Boards go grey. They warp slightly. Moss and algae take hold. You find yourself treating it every spring, then again in autumn, and it still looks worse each year.
At Ellis Decks, we get a lot of calls from homeowners who are simply tired of it. Not people who want a bigger deck or a fancier one. People who want their outdoor space back without the annual maintenance battle.
Replacing old timber with Trex composite is the permanent fix. Trex is engineered specifically to resist the conditions that destroy timber: moisture, UV, freeze-thaw cycles, and everyday wear. Once it's down, the job is done. No treatment, no painting, no annual inspection to see which boards need replacing.
Signs Your Timber Deck Needs Replacing
Most people hold on too long before replacing a timber deck. If any of these sound familiar, you're past the point where treating or patching will solve it:
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Boards are grey, cracked, or visibly rotting in places
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You're treating the deck every year but it looks bad within months
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Some boards have gone soft underfoot
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There are splinters appearing on surfaces people walk on
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The frame underneath is showing signs of rot or movement
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Screws are popping or boards are pulling away from fixings
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You've stopped using the deck because it looks or feels unsafe
If your deck is showing one or two of these signs, targeted repairs might buy you a couple of years. If it's showing three or more, a full replacement is the more cost-effective route. Patching a failing deck repeatedly costs more over time than replacing it once properly.
What Our Customers Say
" We had our deck built by Ellis in September of last year. Ellis was very professional from start to finish. He came up with very good ideas for the design. Extremely pleased with the finished deck and railing system. We would definitely recommend both Trex as a product and Ellis as the contractor. We’re looking forward to many years enjoying our deck. Thanks again Ellis "
"Ellis is the main man!
We had Ellis and Liam come to sort out our timber decking for us and what a job the boys have done on our new Trex deck! We would highly recommend to anyone, thank you for your hard work it has truly paid off! Our garden is perfect"
"Ellis has completed several jobs for us from replacing picket fencing to a composite deck and railings. His attention to detail is to be admired, he is not afraid of giving you ideas for your project. We cannot rate or recommend Ellis highly enough."
What Happens When We Replace Your Deck
1
We assess the existing deck.
Before quoting, we look at the frame as well as the boards. If the subframe is sound, we can often keep it and replace the surface boards only. If the frame has moved or rotted, we quote for a full new build. You get an honest assessment, not a default upsell.
2
We remove and dispose of the old decking
All old timber, fixings, and waste are cleared from site. You do not need to arrange a skip.
3
We prepare or replace the subframe
If needed, the frame is rebuilt to ensure a solid, level base. Composite decking is only as good as what it sits on.
4
We install the Trex composite decking
All boards are laid using hidden fastening systems for a clean, screw-free surface finish. We work to manufacturer standards as a TrexPro Gold installer.
5
We carry out a final check and clean the area.
The finished deck is inspected, any off-cuts cleared, and the space is left tidy before we hand over.
Timber vs Trex Composite What Changes
Why Choose Us
Why Homeowners & Businesses Choose Us For Decking Projects In Cardiff
TrexPro Gold installer
Trex accredits installers based on experience and quality standards. Gold is the upper tier. It means every deck we install meets manufacturer standards and qualifies for the full 25 or 50-year warranty. Without an approved installer, that warranty does not apply.
3D design service
Before work begins, we can produce a 3D design showing how the finished deck will look in your space. This is especially useful when upgrading from timber, as many homeowners want to rethink the layout or add features like seating or lighting at the same time.
We assess the frame
We check the subframe before pricing. If the frame is sound, we say so and save you money. If it needs replacing, you find out before we start, not halfway through the job.
Removal of the old deck
You do not need to organise a skip or arrange waste removal. Old timber, fixings, and debris are cleared and disposed of by us. The replacement process is handled from start to finish.
12 years replacing decks
We have been installing and replacing decks in this region since 2012. We know the ground conditions, the local climate, and what causes South Wales decks to fail faster than they should. That experience shows up in how we prepare the base.
5-star rated
"Ellis is the main man. We would highly recommend to anyone, thank you for your hard work, it has truly paid off. Our garden is perfect." — James East, South Wales
Frequently Asked Questions
How much does it cost to replace timber decking with composite in South Wales?
The cost depends on the size of the existing deck, the condition of the subframe, and the Trex range selected. As a rough guide, composite replacement projects typically start from a few thousand pounds for a standard garden deck. We provide a detailed, fixed quote after assessing the space. There are no surprises once work begins.
Do you remove the old timber decking as part of the job?
Yes. We remove and dispose of all old timber, fixings, and debris. You do not need to arrange a skip or clear the area yourself. Removal and disposal are included in our replacement quotes.
Can the existing subframe be reused when replacing boards?
Sometimes. If the subframe is structurally sound and level, we can lay new composite boards directly on top, which reduces cost and installation time. We inspect the frame before quoting and give an honest assessment. If it needs replacing, we tell you upfront.
Is composite decking slippery when wet?
Trex composite decking is engineered with slip resistance in mind and performs significantly better than timber in wet conditions. Like any outdoor surface, it should be kept clear of algae and debris, but regular brushing keeps it safe and easy to use year-round.
How long does a decking replacement take?
Most standard residential replacements take three to five working days, depending on the size and whether a new subframe is required. Larger or more complex projects can take up to two weeks. We provide an accurate timeline with your quote.
Is it always better to replace rather than repair?
Not always. If the deck has one or two problem areas and the frame is solid, targeted repairs can add a few years of life. But if multiple boards are failing, the frame has moved, or you're spending money on treatment every year without results, replacement is almost always more cost-effective over a five-year period. We will tell you honestly which applies to your deck.
How far in advance do I need to book?
We typically book two to four weeks ahead during spring and summer, when demand is highest. If you're considering a replacement this season, it is worth getting in touch early to secure a date. Autumn and winter availability is usually more flexible.
Still Have Questions?
Areas We Cover for Decking Replacement
Ellis Decks carries out timber decking replacement across South Wales and surrounding areas. We regularly work in:
Abergavenny
Cardiff
Monmouthshire
Brecon
Ebbw Vale
Usk
Blaenau Gwent
Newport
If you’re unsure whether we cover your area, just get in touch and we’ll let you know.