I am currently clearing the area for an extension, its roughly 8m wide x 5.2m out externally, engineer and architect are still working on regs drawings but I'm keen to clear as much as i can whilst the weather is good as I'm doing it all by hand and there is a raised patio of 80 slabs.
Site is sloping away from the house.
Would it be safe to assume 450mm depth required at the moment for the oversite? 50 hardcore, 100 concrete, 150 air gap, 150 joist minimum
I'm happy to have to dig further once I know whats needed but want to avoid going to far just now, is there any downside to clearing the oversite before digging trenches?
Site is sloping away from the house.
Would it be safe to assume 450mm depth required at the moment for the oversite? 50 hardcore, 100 concrete, 150 air gap, 150 joist minimum
I'm happy to have to dig further once I know whats needed but want to avoid going to far just now, is there any downside to clearing the oversite before digging trenches?