Exterior Soffit Molding . We can match and restore any type of stone material. They are not affected by rain, snow, or changes in temperature. Hk Construction Services Exterior moulding, Exterior brick, Dentil from www.pinterest.co.uk The second variable, settled dust, also can have a profound effect on mold growth rates. To combat this, paint manufacturers add different antifungal additives, with varying degrees of success. Latex paint, unfortunately, is a perfect food source for mold growth.