Jason Rozario
Hi, You should start with a good 4" of sub base ie scalpings / lean mix concrete / the scalpings should be compacted, then you have a few options, you can lay the paving on sharp sand or building sand & cement or sharp sand and & cement . As for the joints you can butt them together but if they are not perfectly uniform in size your bond will work its way out , the best option is to leave a gap of about 10/15 mm then point with sand and cement . I would recommend that you get a landscape specialist or builder in to do this as it's not an easy task for a novice. Hope this helps and good luck. Jason Edifice Projects
