Timber roofing batten tanalised - treated used on various parts of building such as fixing roof sheets, tiles, slates. Ideal For Projects Around The Garden & Ideal for Securing Felt Around Shed Roofs. Also known as (2x1) (2 x 1) (25x50) (25 X 50) (TIWE2550TGRN) batten. (Other Timber Supplies Available)