About TDA

The Timber Decking Association (TDA) is a technical and advisory organisation that provides guidance on the materials and practices required to create high quality decks and associated structures.

The TDA is the voice of authority on decking in the UK and is recognised as setting the standard for all that's best in design, construction practices.

The Association's main aim is to help homeowners, developers and the operators of commercial and leisure properties specify or source high quality and performance deck structures.

Membership of the TDA is made up of organisations, large and small, spanning the entire timber supply chain and includes: forestry associations; timber technologists; component manufacturers and suppliers; timber protection and maintenance specialists as well as designers and installers. All share a love of wood and a commitment to high product and service standards in accordance with the TDA Members' Charter see below.

All businesses registered with the TDA are required to sign the TDA Members' Charter, which requires them to:

• Provide a well made product, fit for purpose, in accordance with the DeckMark quality assurance scheme which is subject to independent audit.
• Respond to all enquiries with courtesy, efficiency and promptness
• Provide clear, accurate information about the product/service offered and prices
• Provide clear, accurate information about the suitability of products, safety and advice about aftercare and maintenance
• Give a written guarantee on construction work that is clear and complies with current consumer legislation.
• Ensure staff or subcontractors are adequately trained to undertake their duties
• Refer unresolved customer complaints to the TDA Dispute Resolution Service and accept the outcome.

Before a business is listed on the TDA register of approved suppliers it must first achieve accreditation to the DeckMarkTM quality assurance scheme. This enables the TDA to establish if the business is able to meet the standards it requires.

The DeckMarkTM scheme is made up of two parts:

Part 1: Products. This relates to the materials and products used in the construction of decks and associated outdoor structures.

Part 2: Installer. This relates specifically to the quality of workmanship.

To maintain their place on the TDA register of approved suppliers, each business is subjected to a yearly DeckMarkTM visit by an independent inspector to review their compliance with TDA requirements.

	This symbol applies exclusively to products complying with TDA quality standards. For list of Product suppliers click here				This symbol applies to an installer whose workmanship is approved by the TDA. For list of TDA registered Installers click here

Most of the timber materials supplied by the TDA's component manufacturing members come with a long term performance warranty of up to 25 years which is independently underwritten by major international timber protection companies.