Hi all. So I've had a nightmare. I currently have decking outside. I planned to take the boards up and leave the frame, then clad it with No More Ply (I was told that it would be strong enough) and then put 40-50mm of concrete on top to lay my 20mm porcelain tiles. I have just laid the NMP and snapped two already as its no way strong enough. I am trying to figure out what to do now and wondering what you think is viable.I don't really want to rip all of the decking frame up if I can help it. OPTION1 Fill the voids of the decking frame with MOT or similar to bring it all up to the level of the frames and then fit the cement and tiles on top of that. OPTION2 Lay sheet wood on the decking frame and then NMP over the top and then tile (however I worry this is now making it even higher for my air bricks etc. (I have ready access to lots of chipboard but not sure if I can weather proof this and use it, even thought it will be under NMP and cement and then the tiles, in theory the only moisture will be coming from underneath and won't be direct. Will this work? OPTION3 Sack the whole thing off. lol. Actually this isn't an option but anything else anyone can advise?