Things to consider when cladding your build

Timber cladding can be a fantastic way to finish any commercial or residential build. Attractive, practical and contemporary, wood can help a design to settle into its surroundings and age gracefully.

The key to achieving a high-quality finish on your wood-clad building is specifying the right timber for the job. Different woods and profiles behave in different ways, so you’ll need to determine what suits your building better. To help you get the best possible results from your build, we’re taking a look at the most important things to consider when choosing wood cladding for your building.

Style

For many architects and clients, the most important consideration when it comes to choosing timber cladding is aesthetic. The orientation, size and profile of your cladding will have a big impact on how the finished property looks, so it’s essential to get these aspects right if the build is going to be a success.

Orientation – timber cladding can be installed with the boards running vertically, horizontally or diagonally. The orientation you choose will help to determine the look and feel of the finished building.

Size – cladding boards come in a range of widths and thicknesses. Think about how the thickness of the boards will impact on the look of your building: do you want a chunky texture to your walls or a flat smooth consistent look?  There’s also the possibility of going for multiple widths, adding a scattered feel to your facade. Lastly, if you want your boards to run vertically up the side of your building, think about whether or not you want joints to be visible. If not, talk to your supplier about species that are long enough to run up your facade in a single length.

Profile – this is where attention to detail pays as there is a wide selection of standard profiles available: shiplap, tongue and groove, board-on-board, rhombus and many others. Try to imagine what the boards in each profile would look like when installed side by side. Do you prefer a bigger or smaller gap between them? One of the most popular profiles is TGV: tongue-and-groove fitting, with a groove in a V shape running along the length between the boards, such as the image below:

You’ll find a full range of profiles and styles of wood cladding from most manufacturers, although the trade can usually cater to custom made profiles depending on the size of your project.

Maintenance

You’ll also need to consider how the cladding will alter over time. All wood changes as it ages, with some types of timber fading to a silvery grey within months and others holding their natural colour for much longer.

Still, while timber cladding is a relatively low-maintenance solution for the exterior of your building, it will need some upkeep if it’s going to stay in good condition, especially if you decide to add a coating for colour or extra protection. As @granddesignsmag explains, “Different species vary in the amount of maintenance required. Wood that is naturally knot-free (clear grade) brings a clean, contemporary look while knottier varieties have a more rustic appeal.” Speak to your timber cladding supplier about the types of timber available and the maintenance properties of each cladding option.

Performance

Well designed, good quality timber should provide reliable performance for years to come. Often, one of the most important factors in the longevity of timber cladding is moisture content. Getting the moisture content right will ensure the cladding doesn’t expand or contract too much in extreme conditions and natural ventilation is the best way to get there – so make sure you leave a small gap between boards for the air to circulate and allow the boards to naturally adapt to their environment.

Minimising the movement of wood helps to prevent twisting and cracking and keeps cladding looking like new and working longer. This is where good fixings (we always recommend stainless steel screws) become vital to the success of your cladding project. Most types of cladding can be made more durable by the application of specialist treatments. The design of your cladding can also help to mask the effects of moisture on the cladding and help to minimise the impact of weather on your building’s façade.

Learn more about the different types of wood cladding available, and get advice on the products most suitable for your building, by exploring our site today.

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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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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.

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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.

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