Alcal Specialty Contracting https://www.alcal.com 510.477.9380 42950 Osgood Road Fremont, CA 94539-5627Markets ServedCommercialIndustrialInstitutionalResidentialMaterials & Services OfferedBuilt-Up RoofingCold ProcessComposition ShinglesModified BitumenShake SubstitutesSingle PlyWood Shingles / ShakesCountyAlamedaCityFremont View Contractor