The temple Khafre in Giza plateau was built with huge stones of limestone, which is covered with red granite. Most of this granite was taken from the outside. This granitic casing has been affected by many exogenous and endogenous deterioration factors, which led to the weakness of the surface layer and the fall of large parts of it and causes of a severe damage of the stone materials. In this study we documented the weathering of these granite casing using field recording and laboratory analysis to evaluate their conservation state. Weathering and deterioration aspects noted through light optical microscope (LOM), polarizing microscope (PM) and scanning electron microscope (SEM). The mineralogical characterization was performed using X-ray powder diffraction (XRD) and Energy dispersive analysis (EDX). Physical and mechanical properties of Granite were determined. The present study suggests that the most suitable treatment methods are composed of co-polymer (Acryloid B66, diluted at 5% in trichloroethylene + Wacker VB132 (Tetra Ethoxy Silane) or Estel 1000.