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Groynes are a popular form of sea defence in the UK and many of our beautiful beaches have wooden groynes built on them. They play a vital part in efforts to help protect our beaches from further coastal erosion and to help our beaches be as stable of possible. They are also used in rivers to slow down the rate of erosion and improve navigation.  Although groynes can be made from several different materials, including stone and concrete, here we discuss why wood is a great option to choose.

How Groynes Work
The purpose of groynes is to stop the movement of sand or pebbles from moving too far along the coast due to a process called Long Shore Drift. The groynes are strategically placed at right angles along the coastline at varying points down the beach. They interrupt the water flow and capture the material, trapping it, which helps build up the beach and extend the land rather than it eroding away with the continuous tide. The difference groynes make to the UK coastline is extremely significant and are usually used in conjunction with other methods of sea defence, such as sea walls.

Appearance
Groynes are often built from concrete or rocks. Although these are both effective options, wooden groynes are popular for their appearance compared to both of these. Over time, the wood endures battering from the waves which creates smooth looking wood that is a stunning feature on our coastline.

Cost
Compared to other hard engineering options, wooden groynes can provide good value for money. They can integrate into the environment more naturally than other forms of sea defence. Having a form of sea defence such as wooden groynes can provide peace of mind to both visiting tourists but also to residents and local business owners who live near the sea.

Simple to Construct
A great advantage of wooden groynes is that they are reasonably simple to construct, especially when compared to concrete. They are usually installed in groups and are easy to adapt depending on the state of the coastline. They can be built at different lengths and spaced apart easily to adapt to the beach they are placed on and how much sediment they want to capture.

Versatility in Size
You can have a completely solid groyne which will absorb all of the energy from the waves and therefore capture more sediment in that section of the beach. Alternatively, you can have partly open groynes which allow some water and sediment to pass through but still takes energy from the waves, but to a lesser degree.

Durability
Groynes need to be durable enough to withstand long exposure to the sun, marine life, salt water and the impact of the waves, and timber is a great material to cope with these factors. The lifespan of wooden groynes is decades and involves minimum maintenance.

Why is wood such a good choice?
We have been using timber for water construction for centuries. This is because wood has a lot of desirable qualities which are needed when building in water. These include

  • Having a high strength to weight ratio
  • It has high density
  • It is easy to work with
  • It has good durability
  • It has good resistance to abrasion

Marine timber has the ability to withstand strong winds and waves better than a lot of other materials. This natural resilience therefore makes it an obvious choice for both coastal and river situations. Wood can be cut to size and therefore is very versatile and adaptable to each individual project’s needs.

What types of wood are best?
Overall, hardwoods are a better option over softwood species as they can be more durable and have a higher resistance to abrasion.

Tropical hardwoods are great options to use. Two of the most popular choices are Ekki and Greenheart. However, other tropical hardwoods such as Balau and Jarrah have been used for water projects as well. Ekki is an especially great choice as it is also referred to as “iron wood” due to the strength of the material. It is because of its characteristics of being strong, durable and able to withstand abrasion that Ekki has been used in marine construction for over a century.

Who are Eco Choice?
Eco Choice are specialist suppliers of certified timber and recycled plastic products. We were formed in 2005 with the aim of promoting FSC certified timbers to the UK construction industry. We offer products from a wide range of different timber species. We are passionate about supplying our clients with independently certified timber products while encouraging responsible and sustainable practices at the source level. To find out how we can help you and to get a quick, no obligation quote, please call us on 0345 638 1340, email us on info@ecochoice.co.uk or for more information about our sustainable timber products, please visit our website https://ecochoice.co.uk

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Wooden sea defence

Ask Joe! Expert industry advice

Unsure which timer is best for your project?

Our timber experts have years of experience and will be able to match the perfect species to your project, as well as provide a quote for sustainable timber at highly competitive prices.

Frequently asked questions

Do you supply timber for domestic uses?

Yes, we supply timber for domestic applications as well as commercial and public constructions. From garden decking to shed cladding, we will be happy to supply smaller deliveries for home use.

Is your timber FSC-certified?

Yes, all timber we supply is FSC or PEFC certified and sourced from independently verified responsibly managed forests. If we can’t find your request in FSC/PEFC certified timber we’ll suggest an alternative that is certified or clearly note that the offer is minimum EUTR.

Where does EcoChoice deliver to?

EcoChoice delivers to construction sites, warehouses and homes across the UK, as long as there’s access and unloading for our trucks.

What are the best timber species for exterior use?

There are many different timber species suitable for exterior use and which is the best for your project depends on your requirements. In general, though, we recommend EkkiGreenheartOpepe and Oak for heavier civil/marine uses. For intermediary external use such as decking, where the timber needs to be both strong and durable but not on the same level as civil engineering (bridgespiling, etc) we usually supply CumaruIpe, Jatoba, and Balau. And for the lighter exterior use where the timber is non-structural such as cladding, we deliver CedarLarchThermowood and others.

Which timber is the most durable?

Durability Class 1 timbers are the most durable. This of course depends on the use (hazard) class they’ll be in service for. For direct ground and water contact such as sleepers, fenders, marine piling, etc, Ekki and Greenheart are known to be the most durable timbers available. For decking and cladding where there’s no direct ground contact (use class 3) there’s a much wider range of timbers such Larch, Cedar, Thermo modified Pine or Ash and others.

What’s the best timber for internal cladding?

Internal cladding, where your timber is not in ground and not exposed to the elements can be classed as either use-class 1 or 2 – in which case most timbers will meet this durability criteria. That is not to say they’ll be the best, since internal environments have lower humidity (moisture) levels than outside. So in these cases, it’s best to go for a kiln-dried timber cladding board as these are more stable and delivered already in lower MC (moisture content) than the usual fresh sawn timbers sent to external applications. A word of caution – as timber reacts to variations in moisture, it’s best to avoid cladding any areas inside your bathroom.

How can I make decking less slippery?

The first thing is to ensure your deck boards are kept clean from leaves and other debris which will, over time, cover the surface and make it more slippery. Grooved boards can be used to improve grip if installed and used perpendicular to traffic, so especially useful in narrow passages and footbridges. Lastly, you can add our Grip-Choice strips: these are a mix of epoxy with aggregates that add gripping ridges to your deck area. Gripchoice is an easy way to make decking less slippery and safer, especially over large areas or where there’s high traffic. We can pre-install Grip-Choice strips for your decking before delivery or ship the strips separately to add to your existing deck’s grooves as a retro-fit solution.

What wood machining services do you offer?

We can offer planing, sawing, drilling and profiling of rough-sawn wood to any profile you require: from handrails to large port fenders.

Can you supply pre-drilled timber?

Yes, we will be happy to provide pre-drilled timber which is tailored to your needs for quick installation, thus saving you valuable time on site.

What cladding profiles do you supply?

We provide a wide range of cladding profiles, including tongue and groove, featheredge and shiplap. You can check the standard profiles here – but we can also match or custom make profiles to suit your specific needs.

Does timber change colour?

Yes, timber is well-known for changing colour over time. Some species can darken quickly right after installation, and like most untreated wood will eventually weather to a beautiful silver-grey. Interior timber is less likely to change colour (depending on conditions), and timber can be stained, painted or treated with UV-resistant oils to reduce colour change.

Do I need to treat exterior timber?

Some timbers such as Oak and Ekki, can withstand the strains of exterior use without any treatment. However, to extend the lifespan and maintain the aesthetic of your wood, we do recommend treating your timber with stains and oils. Pre-treated timber, such as ThermoWood and OrganoWood, are low-maintenance options which are more durable, but can have their life service extended by applying a clean and stain maintenance schedule.

Do I need to treat interior timber?

Depends on what area the timber is being used. For floor joists and timber rafters, it is common to see timber treated, or least very well kiln-dried. Other uses such as flooring may benefit from varnishing while internal timber cladding for decorative purposes shouldn’t require any treatment other than if you want to change its colour with different types of stains or oils.

Where are you based?

We’re based in Cambridge, UK, and coordinate multiple sawmills all over the world to manufacture your order. We then organise delivery with a range of hauliers so that your orders gets to your site on time.

What are the usual decking sizes?

Timber decking is usually 21x140mm or similar. For heavier applications where there’s more load and traffic, we deliver 35 or 45mm thick boards (such as Hastings Pier). Narrower boards are also possible: 95-90mm is a standard width – but we can manufacture whatever size you require.

What are the usual cladding sizes?

Typical cladding section sizes are 18×95 and 18x145mm although we can always custom make a section to suit your project’s design requirements. That includes waney edge boards in Oak or Chestnut as well as extra wide 195mm boards.

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Good quality, great service, fast delivery!

5

Marinella Li

Always helpful! One of our valued TDCA DeckMark and CladMark accredited supplier members which means their quality procedures are routinely audited and stand up to scrutiny giving you extra peace of mind.

5

Janet Sycamore

Having needed the supply of cladding, decking boards and other specified timbers through out the year Eco choice have been very helpful in sourcing the specified timbers and quantities required at a very competitive price.

5

Tim Saunders

Great quality, service and price. A pleasure to deal with. I would highly recommend Eco Choice.

5

Emma Hurrell

Fantastic company- Mike and the team are the best in the business- worked with them for many years.

5

Prem Raja

Always reliable and quality products, easy to deal with company.

5

Stone Zone

4.9

Average rating on Google Reviews

  • 6 years ago

Fantastic company- Mike and the team are the best in the business- worked with them for many years.

Prem Raja

  • 6 years ago

Always reliable and quality products, easy to deal with company.

Stone Zone

  • 6 years ago

Great quality, service and price. A pleasure to deal with. I would highly recommend Eco Choice.

Emma Hurrell

  • 9 years ago

Wonderful guys!

Nicola Edmead

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