United Kingdom Accreditation Service, certifying your timber frame project is manufactured and erected to reliable and quality ISO 9001:2000 procedures SGS - Society General de Surveillance ensures that quality systems and procedures are used in the design, manufacture and erection of your engineered timberframe structure is of the highest standard FSC - Forest Stewardship Council - FSC Timber Frame certification. Benfield ATT hold Chain of Custody certification for the Design, Sales, Manufacture & Distribution of Engineered Timber Structures – FSC endorsed by Greenpeace, Friends of the Earth and WWF and EcoHomes Investors in People, Benfield ATT are one of a few timber frame companies to hold an award for the training and ongoing development of their people and service   Examples of timber frame homes

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Professional Association Downloads


TRADA Publications
These are free pdf publications, but may require you to register with TRADA for free. Click here to do this.


  • Durability by Design - The life of timber components can be extended considerably by attention to detail at the design stage. Achieving 'durability by design' requires a designer first to target and define performance and maintenance expectations and then to specify and detail appropriately. Download PDF. View HTML.


  • Structural Timber Composites: A Design Guide - Timber itself is a valuable structural material. It can also be combined with other materials, such as adhesives, to form a variety of composite products. View HTML.


  • Timber Frame Construction: Site Control Checklist - Timber Frame construction is a dry, lightweight method of building; easily and quickly constructed to a weatherproof stage using factory-made wall panels and trussed rafters, or roof cassettes. The intermediate floors and roof act as structural diaphrams which contributes to the overall stability of the building. View PDF.



Trussed Rafter Association (TRA) Publications

These are available to all, for free.


  • Creating Roofscapes with Trussed Rafters - Trussed rafters have become part of the modern building vocabulary. Around 95% of all new house roofs are constructed using trussed rafters. View PDF.


  • Room in the Roof & Attic Trusses - The 'Room-in-Roof' or attic trussed rafter is a simple means of providing a structural roof and floor in the same components. This offers considerable advantages over other methods of extending buildings. View PDF.


  • Standard Bracing of Duopitched Trussed Rafter Roofs for Dwellings - Trussed rafters must be braced to create a rigid and stable roof structure. If the bracing is omitted, wrongly positioned or badly fixed it may result in distortion or failure of individual trusses; or in some instances the entire roof. View PDF.


  • Storage and Erection of Trussed Rafters On Site: Guidelines - When a delivery of trussed rafters arrives on site, the contractor should be prepared and should have allocated sufficient and suitable resources for their storage and erection. View PDF.

Chartered Building Consultancy - timber frame, OSM (off-site manufacture) and engineered timber structure advisors. Timber Research and Development Association – our work with TRADA ensures high quality, eco-friendly engineered Timber Frame build projects. The Green Register of Construction Professionals - Benfield ATT's membership demonstrates our passion for environmentally sustainable timber frame self-builds, new homes, schools and social housing for local housing authorities AECB - Association of Environment Conscious Building – our FSC certified timber frame is endorsed by The Ecology Building Society Impact Upon Society Big Tick Award from Business in the Community – BITC – award-winning timber frame company within the Timber-frame industry TRA - Trussed Rafter Association – our membership assures Timberframe Trusses, Trussed Rafters, roofs and complex and innovative roofscapes are quality HBF - the only developer partnering timber frame company to be members of the House Builders Federation. Wales Quality Centre – members and committee members, we ensure the highest quality, especially when coupled with ISO 9001, FSC certification and Q-Mark Plus standards RICS - Royal Institute of Chartered Surveyors, assures our customers of our professionalism in wood and timber frame building and developing and surveying
Benfield ATT FSC-Certified Engineered Timber Structures do not cost the Earth.
Chain of Custody TT-COC-1928. FSC Trademark (C) 1996 Forestry Stewardship Council