That’s a great answer in the spirit of helping others. Thanks.
That’s a dam good set of information Saneasaduck. It looks at first I may have to eat my words as 2 ft is not far off 600mm. the contractor must know something more than 600mmm to pull off especially when the rest of the estate except one area has had no problems. The one area that did had a gas leak after a low dug pipe was ruptured. Apparently cost a fortune to fix. I will have to read what you have pointed out first, unless perhaps you know a depth that should be worked to?
