Abstract: An improvement in endcaps for use with a rain gutter, the improvement having an endcap defining an end wall that extends diagonally upwardly from the rain gutter past the longitudinal extension of the fascia board to which the rain gutter is connected and beneath a portion of the shingles extending beyond the fascia board. The extended endcap receives runoff water falling from the aforesaid portion of the shingles and conducts the runoff water within the rain gutter.