Thanks for the quick replies guys.
'after all you can park a car on it' - funny how when you start looking for problems you can miss the obvious! Why didn't I think of that!
Thanks again
I have decking to install onto part of an area which has been block paved. I am concerned about the point loading of the posts on the paving and am considering standing them on pads to spread the load. I had thought of paving slabs but not sure if these will crack if surface uneven. Anybody done...