I have dug (1m deep) the foundations for our new two storey rear extension and they have passed their inspection by the local building officer. I have the concrete coming this weekend and would like someone to confirm the level to fill the trenches to.
It is an old house built into a slight slope. So the existing floor level of the kitchen is 150mm below the ground level where the foundations are. I need to tie the new extension to the floor level of the kitchen. So what level do I fill the trenches in with concrete. I think the building inspector said 225mm below the kitchen floor. Is this correct and fairly standard? I have read elsewhere that it should be minimum 150mm below the ground level. The finish of the building along one wall is block rendered, the other wall is stone with a bi-fold door?
Any advice will be greatfully recieved. Thanks
It is an old house built into a slight slope. So the existing floor level of the kitchen is 150mm below the ground level where the foundations are. I need to tie the new extension to the floor level of the kitchen. So what level do I fill the trenches in with concrete. I think the building inspector said 225mm below the kitchen floor. Is this correct and fairly standard? I have read elsewhere that it should be minimum 150mm below the ground level. The finish of the building along one wall is block rendered, the other wall is stone with a bi-fold door?
Any advice will be greatfully recieved. Thanks