On Sat, 4 Jun 2005 22:46:20 +0100, "Mike" wrote:

Yes - but not underneath. DPCs are a good idea no matter what the technique
or era.

Not necessarily under straw bale. You need drainage at the bottom of the
stack and a poly sheet DPC is likely to cause more trouble by trapping
water from above than it will solve by stopping "rising damp" from
below.