This invention provides wallboard with a gypsum core with improved
antifungal properties based on the distribution of fungicide and starch.
Preferably, the wallboard has a gypsum core having a first surface and a
second surface; facing sheets adhered to the first and second surfaces; a
fungicide and a starch in the gypsum core; wherein the concentration of
fungicide and starch is greater in portions of the core adjacent to the
facing sheets than in a center of the core. Also a method for
manufacturing wallboard as described above.