I've read on some online sites that hybrid flooring can be used on patio floors but I've also been told by flooring companies that you can't. I've just had an alfresco area extended and also enclosed it on 3 sides. The 4th side will be security screened but not have weatherproof doors. It does have eaves all the way along and is therefore somewhat protected. If the flooring is waterproof, which I'm told it is, and if I were to Sikaflex all along the 4th side to prevent any water getting underneath the boards I don't understand why it can't be used. The existing floor is tiles and new concrete level with each other