corner protector member 1 and the adjacent or adjoining surfaces of the interstices seams or joints 4 6 the scope of the present invention is not limited to the above referenced method of anchoring the corner protector member for example rather than a permanently elastic interstice seam or joint which is maintainable and of which the sealing or caulking material may be readily replaced other types of interstices seams or joints may be employed such as flexible or expansion joint type interstices seams or joints which interrupt otherwise seamless or otherwise uniform surface finishes or assemblies such as tiled surfaces so as to prevent stress fractures from forming all such interstices seams or joints are suited to receive the corner protector member to result in a finished inside corner it is important to note that the transition regions or transition zones 8 as depicted in fig2 should ideally be achieved by careful placement of the corner protector member in relation to all interstices seams or joints 4 6 in order to result in a smooth impervious and seamless confluence with due attention given to the proper alignment of all sides of the corner protector member 1 with the interstices seams or joints 4 6 converging at inside corner 7 it should.