Plastic & UPVC Decking

Plastic UPVC Decking

UPVC Decking Installers

Whilst most people are familiar with composite decking, plastic or UPVC decking is also growing in popularity the main reasons being, just like composite decking, it provides a low maintenance decking option. Just like timber or composite our Zest Decking teams are just as happy to install UPVC plastic decking if that ends up being the choice you opt for. Since UPVC decking is available in a wider variety of colours, certainly than timber,  this may be where you can achieve the look you're after for your decking area.

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What is Plastic Decking | UPVC Decking?

Historically plastic decking was fairly exclusively associated with the deck areas which surround static caravans, however, as technology and material developments have advances UPVC decking now has a place in gardens across the UK.

So what is plastic or UPVC decking and how does this differ form composite decking. Fairly simply the main difference between a plastic and a composite deck board is that a plastic deck board will be made up entirely from plastic where as a composite board will comprise of mainly plastic but will also contain a percentage of wood fibres. So - does this may much of a difference?

We certainly not according to UPVC decking manufacturers. Most plastic decking manufacturers use recycled plastic for their boards so the argument of sustainability, recyclability again becomes quite a subjective area with one type of board whether it be timber, composite or plastic having a case for having a lower total carbon footprint over its lifetime compared to the others.

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UPVC Decking versus Composite Decking

When looking at the differences UPVC decking and composite this is more of a comparison exercise. in summing up some of the similarities both a predominantly made up from synthetic materials and it is the synthetic or plastic parts which provide similarities in features and benefits for both. One being the fact that both are pest, moisture and as a result much more rot resistance. Both require minimal maintenance compared to timber decking and are durable finishes. Both can have anti-slip properties which contrary to instinct, means that both are less likely to be as slippery as timber when wet.

Whilst UPVC decking will claim to be slightly stronger than composite, both will be strong enough for their intended purposes so why this is a feature if provides limited 'real benefit' over composite. It is also slightly lighter so whilst this is preferential from an installer's perspective it makes little difference to you as the deck owner once laid.

By being made completely of plastic UPVC decking it is therefore easier to recycle when this point is reached and is slightly more mould resistant than composite decking.

One claim composite manufacturers will make of plastic decking is that it will  have a greater tendency to warp. The may well have been the case several years ago but with advancements in materials, fixing and laying with the correct expansion gaps this should not happen with modern UPVC decks.

As you an see there is very little to choose between them so the final decision may well simply come down to personal preference on a design or colour between the two.


Cost of UPVC versus Composite Decking versus Timber Decking

In todays current climate of uncertainty both in terms of imports/experts and raw material availability we are in fluctuating times regarding comparative pricing between the different decking board options. Wood prices are raising dramatically due to supply and production shortages, which is pushing timber prices nearer to composites and plastic decking so what used to be a substantially big installation price difference is getting less and less different. So unless you have already made a decision on which type of decking you want, it may well be worth asking for quotes for composite and plastic if you have some flexibility in your timber decking budget, especially if you are planning on staying in your property for a number of years


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UPVC Decking maintenance

To be perfectly honest there is little to say about this - what is saying a lot! Whilst manufacturers will provide guarantees of around 20 years many will be expected to last nearer 30. It is worth remembering that it is plastic and not totally indestructible o resistant to all drops and spills. A gentle clean with a pressure washer will help remove and settles debris and if anything spills on it you should aim to clear it up as soon as possible - which should really be the case with all decking. 

It is also worth carrying out an annual inspection get to ensure that fastenings are still tightly in place and haven't worked themselves loose it all. If they have simply tightening them will minimise greater movement and potential damage.

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Need help?

Frequently Asked Questions

Decking Tips


  • How long should timber decking last?

    Clearly, a major factor in how long timber decking will last will depend on the level and frequency of wood treatment. Using good quality decking protective treatment applied at the very least every three years should mean that your softwood decking lasts about 15 years. If you’ve inherited decking by moving house the telltale signs mentioned earlier such as cracking and shrinkage may mean that your decking has gone beyond retrospective treatment and you’ll need to look at full deck replacement. If your structural timber is in good condition it may mean a simpler and less costly task of simply replacing the deck boards. Even with a timber structure, composite decking can be still be fitted onto this base to provide a low maintenance alternative to timber deck boards. Otherwise, prepare yourself for deck treatment work every couple of years to make your new softwood timber decking last at least 15 years!

  • When does decking need replacing?

    There will be a number of indicators that your decking is past its prime. Clearly, the final decision will rest with you in terms of how long you leave it and of course whether your finances will allow for a new decking this year rather than next. 

    That said, we’ll try and provide you with some points to review and hope that when the time comes you will give us at Zest Decking a call.

    If you have boards where gaps are growing between them, or there is deck board movement, this can be an indicator that there may be an issue with the supporting structural timber below as well as the deck boards on top. A good way to check is to remove at least one of the boards to decide if the issue is with the decking boards, the structural timbers or both. If you have balustrades and handrails which also have a lot of play in them it’s a good indication that your decking structure has pretty much had its day.

    If the structure has been checked and given the thumbs up but deck boards have extensive cracks, splinters, colour variations or other damage you can simply replace the boards.

    Ideally, if you are having new or replacement timber deck boards it is prudent to have these fitted with a slight slope to allow rainwater to run off and not stagnate or puddle in the deck grooves.  Therefore the decking should be laid so that the slope runs along the length of the grooves to allow water to run off the wooden decking helping it to last longer.

    If you have movement of the total structure or it looks like it is leaning, then there is an issue with the structure, most likely around the structural deck posts. Clearly, this poses a potentially serious hazard and replacing your decking completely, should be recommended.


  • Which decking boards are best?

    Well, that depends on what you’re looking for. Best for the price will be softwood decking as this will be the cheapest decking board option but the downside is that they will require by far the most maintenance so long term may not be the cheapest if you were to add up the time, effort and treatment materials for over 15 or so years. However, if your initial budget is limited this is a great way to finally getting yourself a decking area for your garden. The better wood-alternative is hardwood decking but this can end up being one of the most expensive decking materials. It is expensive as hardwoods such as walnut and balau are much slower growing than softwoods so are not as widely available. They will generally have a natural darker appearance and will look like an expensive interior floor and will require quite little maintenance. If looked after well, they can last almost as long as composite boards, so will have a lower cost if the total cost of your decking is divided over the number of years it lasts. 

    Finally, composite and plastic boards are the lowest maintenance options by far. For the general look and feel composite will provide a more authentic wood effect due to the natural wood fibres also since the production process is slightly simpler the cost of plastic should be slightly less than composite. Plastic decking will typically ‘look more plastic’ than composite decking and there have been instances where if plastic decking has not been laid with appropriate expansion gaps warping may occur. For the smaller additional cost of composite decking to have a great looking virtually maintenance-free decking which should last at least 30 years composite will generally be the best long term decking both in terms of overall lifetime costs and aesthetics.


  • Where’s the best place for deck lights?

    Adding lights to your decking can make your decking a real showpiece as darkness starts to decent on your garden in later summer. However, too few and they provide little practical use and you would still need to provide additional lighting for your decking. Too many and the aura will be overbearing and unpleasant for most people. 

    Since deck lights can be placed in a number of locations getting the correct balance between them will make a big difference to the overall look of your decking at night.

    Incorporating decking in the centre of a deck board, avoiding joints and between 1.2m and 1.8m apart is a good rule of thumb. Where you have stairs leading to your deck, aim for the lights per step being a similar distance apart. Where you have wall lights at the side of your decking, since these serve a more decorative purpose, extending the space 2-3m apart should work fine whilst lights on balustrades should be 1.8m-2.5m apart.


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