The Timber Decking & Cladding Association (TDCA) is an independent, not-for-profit, advisory organisation. Established to influence and promote good industry practice – 25 years on and we’re still raising the bar on all things timber decking and cladding. Our industry recognised DeckMark and CladMark accreditation schemes verify the quality and longevity of products; the suppliers of such products; or the high standards of an installer, with an ever-growing list of accredited members.  The TDCA team has a wealth of industry experience, including a bank of auditors and inspectors. We regularly help landscapers, architects, specifiers, contractors and DIY enthusiasts with both on-hand help and through our library of free resources.