i was being slightly facetious toward what was a pretty vague question.
sure - traditionally the cavity was closed by turning the brick skin toward the inner (usually block) skin, (or the other way around
). and i can see how your closer brick would be a natural and cost-effective progression from that in climates that allow it.
the example i gave of a modern plastic closer is a way of thermally breaking the cavity as well as closing it off. a smaller version can also be combined with turning the leaf - particularly on deep reveals. it's probably less applicable in your warmer neck of the woods
and a little more seriously than i was originally - both of those options are available as cavity closing parameters in the door and window library objects. you need to be using composite walls for them to work of course.
~/archiben
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