The warranties set forth in subsection (b) shall be applicable to any units and common elements that are located within a building that contains or comprises one or more units and is not a conversion building. Otherwise, such a declarant may offer the units, common elements, or both, in an "as is" condition. The declarant of a condominium containing any conversion buildings may also give a more extensive warranty in writing. The times at which the warranties required by this subsection commence and the duration of such warranties shall be as provided in subsection (b).
68 Pa.C.S. § 3411