got to add some 6ft fence panels in the back garden,bit confused as to how to fix gravel boards...do they just sit freely below ground beneath the panels or should they be fixed at either end to the posts? from what I've gleaned from posts(no pun intended) on here, for 6ft panels I need 8ft posts,2ft of which should be underground in concrete leaving 6ft above to fix panels so that would mean the gravel boards are either buried or the post tops are not level with the panels as the gravel boards will,in effect,raise the panel an additional 6 inches hope this all makes some kind of sense chaps.