HI ALL, I'm currently getting the groundwork ready to install a shed/ workshop in the corner of the back garden, however... There is an existing concrete slab tight to one side of where I want to pore my New, much larger slab. Ideally I don't want to brake this old one out..... my question is. How shallow (if a good idea at all) can I go with the new concrete to cover it and it not brake up? Thanks for any help or pointers :-) via /r/DIY http://ift.tt/2fiUfvU
