Asphaltic sheet materials including expandable graphite

An asphaltic sheet comprising:

• an asphaltic component including an asphalt binder, expandable graphite, and colemanite, where said asphaltic component includes from about 1 to about 30 parts by weight expandable graphite per 100 parts by weight asphalt, where said expandable graphite has an onset temperature of at least 160° C., and where said asphaltic component includes first and second planar surfaces;
• a release film removably secured to said first planar surface;
• and
• a polymeric sheet laminated to said second planar surface.