Ive just bought 6 wood decking tiles for an area of garden ive levelled out, added weed fabric, and covered in gravel (roughly 20mm ) http://www.diy.com/nav/garden/fenci...Q-Square-Deck-Tile-L-600-W-600-T-56mm-9276085 now would i need to make a frame for these, or have them raised further? Or are they ok just to keep laid down? btw the tiles are 600mm x 600mm x 42mm (not 58mm) Im going to lay them 3 wide an 2 deep. Do i need to just frame them in all together with 42mm high boards, or raise them all on top of joists n bearers? Im just really confused as to what else i need now. Any help much appreciated. Thanks in advance.