disclosed herein is a hail resistant roof system having a roof deck . an insulation layer is supported by the roof deck . an energy absorbing layer supported by the insulation layer and a waterproof membrane loose laid over the energy absorbing layer . a wind blown debris resistant roof system is disclosed that includes a roof deck with a secondary waterproof membrane disposed over the deck . a layer of stiff material is attached to the roof deck and a primary waterproofing membrane is supported by the stiff material . further , a roof insulation and waterproofing construction upwardly adjacent the waterproofing membrane . also disclosed herein is a hail resistant roof system . the system includes a roof deck with a secondary waterproofing membrane . an insulation layer is supported by the roof deck . an energy absorbing layer is supported by the insulation layer and a primary waterproof membrane is loose laid over the energy absorbing layer .