Roofing Solutions

Engineered timber roof trusses are now used in over 95% of all new housing projects in the UK and are increasingly being used in commercial and industrial projects.

Offering the most cost effective roofing option, timber roof trusses have many distinct advantages:

Flexibility through design to cater for the wide range of services required in the modern building.

Reduced site waste, loss and pilferage of materials.

A practical and tailor-made solution to a diverse range of different roof structures.

Space saving on site, truss deliveries can be specified to arrive only when required.

Material savings of up to 40% less timber than a traditional cut-roof.

Suitable for a number of different roof and ceiling coverings.

Due to trusses being pre-fabricated components, there are substantial on-site time and cost savings.

Ability to design to cater for extra loadings i.e. Office and even industrial use.

Attic Truss

Timber attic trusses combine the speed of erection on site of standard trusses with the open plan nature of the traditional cut roof. Attic trusses can give you several extra rooms in your house for very little extra cost in relation to project as a whole. Attic trusses offer several major advantages:

Roofing a house using attic trusses can be up to 5 times faster than using the cut roof method.

Attic trusses allow for further expansion in years to come. For a little extra initial outlay, the option of one or more extra rooms in your building is there for life. Even if the attic area isn’t availed of upon moving in straight away, the space will always be there if needed later down the line.

The speed of erection greatly reduces your ‘on site’ skilled labour costs. The purchase of the building site and skilled labour costs make up the bulk of your total building expenses. In terms of costs, building materials comes in, a distant 3rd place.

Attic trusses add extra value to your building. If you intend to sell or borrow against your home, the value of an extra bedroom, bathroom or possibly a gym will help add value to the overall standing of your house.

Quality is guaranteed every time using attic trusses. Remember a cut roof is only as good as the carpenter/joiner’s individual skill and experience.

Stubbed Attic Truss

Also known as an ‘upstand attic’, these allow for larger room widths and greater headroom over conventional attic trusses.

The end height at wall plate can be customised to suit the eaves detail you require, or to maximise the room height achievable within your attic space. With Cavity wall construction the internal leaf of blockwork typically stops at ceiling level with a wallplate on top to support the ceiling joist of truss. The external leaf of blockwork then continues on up to match the end height of the truss.

Scissor Truss

The lowest cost option to provide a vaulted ceiling – with scissor trusses being around the same cost per truss as a fink or queen post truss with a flat ceiling.

The internal ceiling is at a lower pitch to the external – as shown in the images below:

Raised Tie Truss

The raised tie truss is two rafters tied with a flat collar tie, to provide for a flat ceiling in the centre with pitched ceilings either side.

Depending on the height from the wallplate to the ceiling tie, the truss may be made with either a solid rafter or stacked chord.If a solid rafter is used the birdsmouth (the horizontal cut where the rafter meets the supporting wallplate) will be formed by joiners cutting on site.If a stacked chord is used this horizontal cut is preformed in our factory – allowing for reduced labour and faster erection of the roof on site.

Raised Tie Truss

The raised tie truss is two rafters tied with a flat collar tie, to provide for a flat ceiling in the centre with pitched ceilings either side.

Depending on the height from the wallplate to the ceiling tie, the truss may be made with either a solid rafter or stacked chord.If a solid rafter is used the birdsmouth (the horizontal cut where the rafter meets the supporting wallplate) will be formed by joiners cutting on site.If a stacked chord is used this horizontal cut is preformed in our factory – allowing for reduced labour and faster erection of the roof on site.

Parallel Chord Truss

These are a very popular option to provide a vaulted ceiling. Similar to a scissor truss, except the internal ceiling and the external rafter are at the same pitch. This provides a ceiling which goes up into an apex in the centre.

Parallel chord trusses provide a more thermally efficient alternative to conventional cut roofs with steel apex beam. Eliminating the steel from the roof construction removes the potential for it to cause thermal bridging, whilst also allowing a greater depth for insulation (typically 450-600mm+) They are ideal for use where you have gable apex windows. Can be used to great effect combined with roof windows as in a previous project of ours below:

Parallel chord trusses are ideal if you are plan to install a feature truss or beams below.

Our parallel chord trusses allow the weather tight roof to be constructed over and carry all structural loads – reducing cost by allowing greater flexibility in the species, section size and member type within your feature truss or glulam beam. Parallel chord trusses allow you to install the feature trusses at a later stage in the construction process when the building is weather tight – even several years later if you are on a budget with your self build

Rounded Truss

Where there is the need for a rounded roof design, possibly due to planning restrictions or perhaps just to accommodate a customer that wants something different from the norm, QUINN TRUSS can produce the solution.

Barrel/Bowstring shaped trusses offer the rounded aesthetic, in keeping with the traditional agricultural ‘barn’ look, whilst adhering to all building control requirements and providing a structurally sound roof. Designs can be tailored to allow for larger void depths to offer more scope for insulation and soundproofing

Space Rafter

Open web joists are increasingly being used in roofing applications. They can provide long clear spans and room to incorporate services within – eliminating the need for a suspended ceiling or the need for any cutting notching or boring.

They are frequently used both in flat roofs or set to falls to meet project requirements. Openings for roof lights can also be incorporated as shown below

Slab Truss

A common problem in recent years has been the compatibility of Roof Trusses and Concrete Floor slabs.

At QUINN TRUSS we have overcome this issue through innovative design and re-engineering of the standard timber truss to accommodate concrete floor slabs into any new build project. The Slab Truss passes all loading and stress tolerance testing and provides the same extensive space afforded by a normal Attic Truss, whilst adhering to Building Control and Industry Regulations.

Passive Truss

Moving with the market trend towards Passive and Near Zero Energy Buildings (NZEB), QUINN TRUSS have designed a truss solution tailored to accommodate passive house roofs.

Specially engineered supports, adjusted eaves details and rafter depths, allow for a ‘warm roof’ and eliminates thermal bridging at the eaves. Increased insulation and air tightness are possible using this unique truss design, as there is no break between the insulation within the cavity and that of the warm roof.