On Sep 5, 4:00*pm, grasshopper wrote:
Suppose a house has radiant barrier housewrap, then 1 x 2 furring
strips on the outside and topped with 4 x 8 hardie concrete siding.
Would there be any problem if I installed foil backed fiberglass in
the wall cavity with the foil facing the interior?

It should work, but what house wrap is a radiant barrier, unless its
foil.