Hi, I'm in the process of building a two storey extension where foundations have been layed for a previously planned single storey extension. The two storey extension requires a number of block piers to support some steel beams. Building specs show 1 Mtre sq pads to support each pier, trouble is that one of the pads needs to go exactly where there is a 600mm trench fill foundation for the old extension. Can I just pour 400mm alonside this to widen the strip to support the pier? I'd rather not have to exract the existing concrete if possible .
Any ideas?? Thanks.
GP
Any ideas?? Thanks.
GP