wrote in message
oups.com...
The DPC felt should be bedded on 10mm of mortar - smoothed flat with no
voids, and the next couse of bricks/block laid on a normal 10mm joint.
That sounds like the joint could be 20mm, i.e. 10mm mortar, DPC, then
10mm mortar, then brick. Or are you saying the top brick goes straight
onto the DPC ?
Simon.

I've yet to see a DPC in a mortar bed that's any thicker than elsewhere in a
wall. Just look around you at the buildings and you can see for yourself. If
you use plastic DPC than the thickness of the plastic is negligible and I
have sandwiched mine within the motar bed so there's mortar above and below.

Paul