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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Structural Insulated Panels

Structural Insulated Panels (SIPs) represent a fast, simple and cost-effective alternative to 'wet' build construction. The most popular form of SIP is Open-Cell Insulated Timber Frame Panel.


Types of Structural Insulated Panel (SIP):

  • Flexi-SIPs

    Open-cell insulated timber frame panel system with factory-fitted dry insulation - the UK's most popular. Read more.


  • Mineral Fibre SIPs

    Closed-cell sandwich metal or timber panel system with an injected rigid mineral fibre core insulation.


  • Foam Glass SIP's

    Closed-cell metal sandwich panel system with an injected foam glass insulation.


Structural Insulated Panels (SIPs) - Fire Rated by Benfield ATT

A typical SIP Sandwich make-up


In our view, the open-cell timber frame panel system is the UK's fastest-growing method of construction for many reasons, and could be seen as a far superior alternative to Sandwich Panels (what is typically known as a SIP).

Benfield ATT's Flexi-SIP system (based on the most popular Open-Cell Insulated Timber Frame Panel technology) has been seen by many as being superior to sandwich panel SIP systems, including recieving the following feedback:

  • Increased design flexibility
  • Save money
  • Less problems on site
  • Easier installation
  • Completely 'dry' system
  • Has been pre-tested to up to 6 Storeys
  • Flexible acoustic and energy options
  • Enhanced durability (with a 60-Year Structural Warranty)
  • Carbon-neutral to the point of our factory gate
  • Easy installation of plasterboard and service ducts


Contact Us for more information



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