About Us

The UK advisory body for timber decking and timber cladding industries

The Timber Decking and Cladding Association (TDCA) is an independent and not for profit organisation.

Through our work, the Association is recognised as a reliable and authoritative source of expert opinion in the UK.

We can assist both large commercial contractors and individuals undertaking residential projects. Advising on areas such as the correct specification of materials, installation guidance and ongoing care and maintenance of both timber decking and timber cladding.

Meet the TDCA team

Janet Sycamore (Director), Caroline Hewison and Barbara Westmoreland (pictured left to right), run the day to day operations at the TDCA office.

Steve Young is TDCA Chairman and Ivor Davies is our expert cladding consultant.

We also work with a team of independent consultants who carry out member site audits and project inspections on our behalf.


Top row left to right: Steve Young (Chairman); Peter Fitzsimons (audits & inspections); Phil OLeary (decking & cladding inspections); Simon Brookes (audits); Gervais Sawyer (cladding inspections).

Bottom row left to right: Ivor Davies (cladding consultant); Simon Hart-Woods (audits & decking inspections); Matt Powell (audits & inspections); Janet Sycamore (audits); Stephen Cope (audits & inspections).

TDCA Team Copy (1)

Just wanted to express my thanks for your excellent website and numerous helpful documents - there seems to be a huge volume of differing (and often conflicting) information / comment about decking online, so I’m delighted to have found a reliable source without a commercial agenda.

I’m about to undertake a DIY decking project on a larger scale than my previous (largely successful) efforts, and your publications will give me valuable guidance - not to mention reassurance. Much appreciated!

Mike, DIYer

Deckmark Cladmark Quality Assessed (1) (1) (1) (1)

DeckMark and CladMark quality assurance schemes

Our DeckMark and CladMark accreditation schemes verify the quality and longevity of products; the suppliers of such products; or the high standards of an installer. We have an ever-growing list of TDCA members who hold this status - search for them HERE

Both of these schemes require the business to have a full audit and assessment prior to any accreditation being awarded. Those businesses that do not meet the standards are advised on how they might improve, in order to achieve accreditation in the future. 

The DeckMark scheme has the full endorsement of the NHBC.

Thanks ever so much for all your help and for getting back with info so quickly.  I appreciate that very much, thank you.  It's so good to be able to talk to people who give sound advice and can guide you to good suppliers.

Jo Armstrong @ Jo Armstrong's Garden Design Consultancy

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Dispute resolution, inspection, and expert witness services

Helping to resolve difficulties with timber decking and cladding projects, the TDCA can offer a number of expert services that can be of help to private homeowners, architects, surveyors, structural engineers, and many other organizations. The bespoke commissioned work might include:

  • Assessing the structural integrity and construction techniques of existing decks
  • General condition surveys and maintenance reviews
  • Assessing material faults and possible causes on site
  • Advising on correct material specification and good practice standards

Read more about dispute resolution, inspection and expert witness services.

An in depth information resource

The TDCA website can offer you a wealth of useful information about decking and cladding. We can also offer a number of technical and guidance publications, many of which are free to registered users of this website. The case studies and gallery pages provide inspiration and ideas for new projects, whilst the FAQ section covers a large number of commonly asked questions.

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We're pleased to be partnered with Futurescape 2024  Read more about the collaboration HERE

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