The demolition guys worked alarmingly slowly. They didn't bring any machinery in until late on when the slab needed to be dug up. Unbelievably they were loading the skips by hand, brick by brick, concrete lump by lump. Anyway, we ended up a bit behind schedule due to them taking 3 weeks longer than planned. If we were ever going to do this again, which we are not, we would know better. I would drive a digger into my flat pack bungalow myself.