Roof Trusses

Bespoke roof trusses for projects of all sizes and complexity.

Roof Trusses

As roof truss manufacturers we supply pre-fabricated trussed rafters, spanning up to 16 metres, and individual sections up to 4.5 metres high that can be used in the construction of roofs of any shape or size. Our roof trusses are all manufactured using the highest quality products by our dedicated team of professionals to ensure premium customer service. We are specialists in our field having been in operation since 1977. During this time, in excess of a million timber trusses have been designed, manufactured and transported to all parts of the U.K.

We understand that every build is different and as a result, different roof truss types of varying shape and sizes are required. All of our trusses are made to measure and we are used to catering for extremely complex types of roof truss design. Be assured that we can help you with your project no matter the size, how detailed it may be or how quickly you require delivery – we maintain lead times of as little as 5 days from manufacture through to delivery.

Our manufactured roof trusses are supplied with structural calculations that will meet building control regulation and our detailed plans include layout drawings, individual truss drawings and details on structural infill timber and any builder’s metalwork that is required.

Types Of Roof Trusses

There is a wide range of roof truss types available – they come in many varying shapes, sizes and profiles. It’s safe to say we have seen them all in our time and below are just some of the roof truss types that we have manufactured.

Roof Truss Design

With 40 years of roof truss design and fabrication expertise behind us, Minera Roof Trusses are experienced in not only meeting but often exceeding our customers’ expectations. Our design offices employ highly skilled technical staff, whose on-going software development training ensures we are at the forefront of the industry.

Submit Your Information

From either the original drawings that you submit to us or via information gained through a telephone conversation, we input the dimensions of your building into state of the art Gang-Nail Systems design software, each truss solution is designed for the specific application.

We kindly ask that you send in with your quote the following information so that we may begin your design at the earliest opportunity: Floor Plans, Elevation Plans and Section Plans.

3d Generation

Once the dimensions have been input, our design engineers will then input the roof shapes onto the walls and give each wall a plane.

With your buildings’ walls entered into the 3D Design Software, your roof planes are then drawn on, enabling our engineers to visualise your roof, three dimensionally.

Whatever the scale of your truss requirement, you can be assured that each project receives the same high level of dedication and is delivered to the same exceptional standard. Once satisfied with the geometry of your building, the designer will proceed to draw each roof truss onto your building. In this example, it is Attic Roof Trusses.

Design And Quotation

From the design software, we can then design each of the different shaped roof trusses that you require for your project and we will then offer you a free quotation and design of your roof.

Close attention at the design stage ensures specifications meet the exact requirements of your building project. You receive layout drawings for your final approval and we deliver to you on agreed lead times.

Our experienced design team can address any specialist requirements or unusual specifications, such as truss rafter roofs for curved buildings and special support conditions.

Our Free Site Measure Service

Let us take responsibility.
Accurate measurements reducing the risk of errors.

How We Calculate The Cost

Roof Truss prices can vary hugely depending on the complexity of the truss, so it goes without saying that there’s no ‘one size fits all’ scenario in providing you with a cost for your build. If you need a quotation or an idea of pricing, then please visit our online quotation page, and we’ll get to work on a price specifically calculated for your build. for your needs. Despite that, roof trusses of a complex nature are an area that we excel in at Minera Roof Trusses.

A full rundown of the items that we take into consideration when providing you with a quote are as follows:

The Span of the Truss

The Span of the Truss

The span is the distance between the outside edges of the two supporting wallplates. This usually forms the overall length of the ceiling tie on a truss. The larger the span the bigger the timbers will need to be to meet regulation and support the roof.

The Pitch of the Truss

The Pitch of the Truss

The pitch of a roof truss is the angle of the rafter from the horizontal ceiling tie, measured in degrees. The steeper the pitch the longer the timber of the top chord will need to be to meet the required angle.

The Truss Type

The Truss Type

You may need a standard truss, attic truss or you may opt for a raised tie truss, all of these are considerations and will impact on the design time in the office. We have the full low down on the types of roof trusses we can supply for your reference.

Quality of Trusses

Quantity of Trusses

The quantity of trusses you will require will be dictated by the length of the roof we are catering for. Depending on the size of your building you may need more or less trusses with bigger or smaller centres (space between the trusses), this will have a pro rata impact on your truss quote.

The Metalwork Required

The Metalwork Required

At Minera Roof Trusses we ensure that our roof truss quotations cover all bases so there aren’t any nasty additional accessory costs at the end – therefore all metal work such as joist hangers, truss clips and stability bracing is included in your quote and isn’t considered an ‘add on’.

Treatment of the Trusses

You may choose to have your trusses treated to protect them from insect attack. In some areas of South East England the treatment of timber is compulsory due to the risk of House Longhorn Beetle. Please consult your local council for more information on your area.

The Design Time Involved

After confirmation of your quote, designs go through further stringent quality control checks and all measurements are reviewed by our Production Department before progressing to our factory to be made.


We’re located in a lovely village called Minera in Wrexham, North Wales and have the luxury of our own wagon fleet which enables us to deliver nationwide within 5 working days from order to your door step. All delivery costs are included in your quotation so again, there are no hidden extras to be added after you order.

Floor Joists

We supply metal web joists which just like our trusses are super speedy to install with no onsite alterations required. Getting your trusses and joists at the same time will mean quicker progress is made on site, cost savings on delivery and quicker delivery times (we offer 5 day delivery nationwide). There are many more benefits which you may have a read through.

Addition of Roof Windows

Adding sources of light can hugely impact the feel of your space. If you’ve chosen attic trusses you may also like to add in roof windows to your design. We supply both Keylite and Velux and can incorporate these into the quote as per your specification.

The Floor Loading Requirement for Attic Trusses

Whether you need your space to be suitable for residential or commercial loading, we will ensure all timbers specified will be compliant with building regulations. Unless specified, we will assume residential loading feasibility is required.

The Roof Tile Type

The type of tile you choose and its associated weighting impacts on the type of timber we will use for your build. Unless you specify your tile type at initial contact we will base your quote on a concrete interlocking tile. This will later be confirmed with you and timbers reviewed if necessary.


Quality Timber

We manufacture our timber roof trusses, attic roof trusses and engineered floor joists using the strongest grade of timber that is available to the UK market. There are many different types of timber available in the UK so we hope this page will provide you with some key pieces of information that will allow you to recognise the substantial differences between the timber we supply and the timber you may see in places such as your local builders’ merchants.

Timber Sizes Available:

  • 35mm x 72mm
  • 35mm x 84mm
  • 35mm x 97mm
  • 35mm x 122mm
  • 35mm x 147mm


  • 46mm x 72mm
  • 46mm x 97mm
  • 46mm x 122mm
  • 46mm x 147mm
  • 46mm x 172mm
  • 46mm x 197mm
  • 46mm x 222mm

How to Build Roof Trusses

Below we provide you with an insight on how to build roof trusses. A roof truss is a type of built-up structural member that can be used in place of a single girder or beam. Trusses are made from multiple straight timbers arranged in triangles. This design allows a truss to span a very long distance without intermediate support; they are preferable to large, heavy girders because of their low cost and easy implementation.

A Fink Roof Truss showing Top Chords, Bottom Chords and Webs.

The process of making or ‘building’ a roof truss all begins with the design. Our software enables us to design projects ranging from the very small to the very large and can incorporate multiple types of roof trusses with varying spans and truss shape configurations.

The best material for building trusses is stress graded TR26 grade timber which is exclusive to the Trussed Rafter Industry. You can find out more about why it’s all that we use on our timber page.

Our designs will ensure that the trusses are capable of withstanding the expected loading for your structure, roof and is adequately supported at its bearing points. These calculations are suitable to provide for building control and negate the necessity of a structural engineer.

The roof truss will have a horizontal bottom chord (sometimes called a tie) and two angled top chords that follow the roof line in a duo shaped roof structure. The top and bottom chords are connected by “web” members, which will be positioned to form triangles. Triangulation provides the basis for the strongest possible structure for supporting weight.

Once we have designed your roof trusses to British Standards and/or European Standards, dimension are sent to the Depauw saw and each timber is cut to its required length and angle. Once the angle is cut, each end is marked so that the shape of the truss can be fitted together on our pressing tables.

We have invested in top of the range, state of the art machinery, which allows us to facilitate very high volumes of timber cutting with ease. This is a vital part of our process which allows us to maintain our 5 day delivery nationwide service all year round.

This is an image of our Depauw 16 axis, 4 blade computerised saw.

Our experienced sawyers make sure that our timbers are cut to the exact length that our production managers instruct them to produce. After they are marked and stacked, the timber is then moved onto the pressing department.

The pressing process is an extremely important stage in the manufacture of a roof truss. All timbers are fitted together and metal connectors are fixed on both sides. It is a common misconception that the metal plate connectors are able to be simply hammered to fix down on site.

In fact, each plate is designed by the engineer to take into account the deflection and the movement in each joint and considers whether the member will be in compression or in tension. Each plate, whilst only small, takes into account the loading for the roof which is loaded with tiles, snow fall, tanks, plasterboard, light storage and for people standing in the roof – it all adds up!

This image shows the truss pressing table with timbers slotted together, ready for the metal connector plates to be placed over each joint.

Minera Roof Trusses use a gantry system in the optimum position for producing our vast quantities of roof trusses. It is a hydraulic press and it is repeatedly exposed to tremendous pressure. For this reason, our hydraulic presses are extremely robust. The maximum press power is between 23 and 50 tons – A stark contrast to the metal plates being hammered into place.

Please note – the metal plates must never be removed or repositioned when onsite. Hammering has been disproved as an effective method by British Standards as it damages the galvanised metal teeth and causes the teeth to roll. By using a hydraulic press, the plates are able to enter the timber in one swift movement.

This is one of our 23 – 50 Ton hydraulic presses being used to fix the metal connector plate into each joint of the trussed rafter.

This procedure is then repeated on the next trussed rafter until the quantity required is reached. The process is repeated for the next truss configuration until each structure is completed for our customer’s order.

How to make & build roof trusses?

A roof truss is a type of structural framework, made up of multiple straight timber beams. The timbers are arranged in triangles to better support the roof and help to bridge the space above a room.

To begin making & building roof trusses, you first need to decide which type of truss you will be making. To find this out, you must measure the structure that you are looking to reinforce. These measurements will determine how big your truss needs to be and the type of truss you should build. You’ll need to know the overall height and length of the structure to know which truss shapes and size is for you.

Knowing the dimensions of your structure will determine the position and angle of the truss top and bottom beams, also known as ‘chords’. For example, a standard shallow roof for example, may only have a 30 degree angle either side.

It’s important to note that truss sizes may be restricted to building permissions. Be sure to check with any and all local building regulators to ensure to be aware of any restrictions that may already be in place.

Take a look at our different types of roof trusses, this will help you get familiar with the right design for your build. Why not get in touch with us, either with or without your structural dimensions, and we can help you find the right truss type to reinforce your roof.

How do roof trusses work?

Roof trusses are made up of webs (compressions and tension) and chords (top and bottom. The truss webs and chords all play an important role in strengthening the trusses core structural integrity.

The chords help to resist any weight on the truss bending the timber beams and where they are connected. And the webs on the truss help strengthen the structural integrity, and act as a support to the outside shape of the roof truss.

The webs and chords of the truss will be found in every design and it is these design elements that make so many forms of truss possible.

How much do roof trusses cost?

Roof truss prices will vary depending on your specific build and it’s needs. If you have a pretty common build then please get in touch and we will quote you right away.

We pride ourselves in offering timber truss solutions for more complex builds, and have managed to help our customers avoid the need for any steel work many times. This has helped our customers to of course save money and utilize the savings on other parts of the building project.

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