Let's go!

Did you know that timber trusses have been used in the UK since the Middle Ages? Some of the oldest still standing in England date back to 1200 and are found at King’s Ely, in one of their school’s boarding houses. They are an architectural staple when creating buildings, and a traditional construction method which is well and truly alive today.

If you are planning a construction project and are interested in learning more about roof trusses, we have put together a guide to the five most common types of timber trusses.

King Post Truss

King post truss example

The King Post truss style is one of the oldest on the books and pretty simple in structure. The timber truss is made up of two main rafters, a tie beam and a central king post which runs vertically to the top of the roof.

It is most commonly used for small to medium-sized buildings, usually for residential purposes. You might also see the Kings Post truss in agricultural architecture (which is a professional way of saying ‘barns’). It is straightforward, brings strong load-bearing properties to the project and maintains an open, spacious feel for interiors.

Queen Post Truss

Queen post truss example

Every King has his Queen, and in the world of timber trusses, it is no different. The Queen Post truss is a variation of the King Post, with the only real difference being that it has another vertical post, with a horizontal straining beam running between the two posts for a more even spread of the weight load.

You will find the Queen Post truss in residential and commercial spaces, and it can cover a slightly larger span than the King Post style.

Scissor Truss

Scissor truss example

Scissor by name, scissor by nature. This timber truss style gets its name from the interesting pattern made by the sloping bottom timber beams, which look somewhat like a pair of open scissors. This unique style makes it a smart choice for vaulted ceilings which need larger spans, creating an open, spacious interior for a grand look.

Churches and large halls often use the Scissor truss,but it is also becoming a staple in modern home architecture. As open-plan living becomes increasingly prioritised, this style of truss fits the bill for light, large spaces.

Fink (or Common) Truss

Fink truss example

Another of the oldest trusses on the list is the Fink Truss – or Common Truss. This is a basic truss design, making it a good choice for simple architecture and cost-effective construction. It is characterised by a W-shape post formation, spreading the weight of the roof effectively while minimising the amount of timber you need, and is most frequently seen in residential builds.

You can also have double fink trusses that incorporate more timber posts for a sturdier finish.

Hammer Beam Truss

Hammer beam truss example

Stepping outside the comfort zone for timber truss styles, we have the Hammer Beam truss. This is the most ornate, complex and visually impressive truss style and is undoubtedly a decorative piece. This is not a truss you would hide away in a dusty loft! There are arches, curves and many connecting timber beams and posts, providing a high load-bearing capability for large spans and huge, high ceilings.

Choose the Right Timber For Your Truss

Once you have picked your style of truss, it is time to find your timber. You will need a durable, strong timber which can withstand a fair amount of weight to make the most of your chosen timber truss style, for example – Oak, Chestnut or Douglas Fir. .

If you would like to learn more about the right timber species for your specific truss, get in touch and we will be happy to help. We can match your project to one of our many sustainable timbers, creating the perfect pairing for a long-lasting, beautiful timber truss.

Tags:

Categories:

Timber truss type guide

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.

Trusted by

What our customers say about us

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

  • 9 years ago

Wonderful guys!

Nicola Edmead

  • 6 years ago

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

Prem Raja

  • 2 weeks ago

Good quality, great service, fast delivery!

Marinella Li

  • 6 years ago

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

Emma Hurrell

Your enquiry

Name(Required)

Contact us today

Opening hours

Mondays: 09:00 – 17:00
Tuesdays: 09:00 – 17:00
Wednesdays: 09:00 – 17:00
Thursdays: 09:00 – 17:00
Fridays: 09:00 – 16:00
Saturdays: Closed
Sundays: Closed