On Sat, 16 Dec 2006 19:53:25 GMT, "Phil L"
wrote:

Matt wrote:

Only if you have the house built by a bunch of incompetent monkeys

No, it's accepted everywhere, get a long straight length of timber and a
spirit level and you'll soon find discrepancies in your own (and everyone
elses) house

No, if you get it laid correctly +/- 5mm over 10m is easy - finding
the long straight length of timber is in my experience more of a
problem.

BTW, 10mm and 21mm lower and higher than what exactly?

The datum.

Is that above or below the DPC?

The datum, there might not even be a DPC.


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