Only sustainable well managed raw materials from PEFC certified sources are used in the production of these B&Q decking products, Tanalith E wood treatment conforms to new European standards & contains no arsenic or chrome, Use in conjunction with deck tiles to create a deck space on an existing patio, Requires less skill to construct over a traditional deck build, When installing this product some joinery will be required, To form a corner, a mitre joint or cutting out of an end will be required.