"Lobster" wrote in message


"Install a separate DPC in severe exposure conditions. A Catnic Cougar
Open Back or Classic Combined Box Lintel with an additional DPC membrane
installed in accordance with normal practice provides the best
possible protection."

Where is this DPC supposed to go?

The only catnics I know of are a box section with a stepped top so that
the outer leaf of the wall sits lower down on it than the inner leaf. A
strip of wide DPC sits on this.

In other words, the cavity above the section is crossed with the dpc so
any water poured down on it from above falls down and out.

How you go about inserting it in your case is a different matter.


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