Signs of water leaking at the corners of your gutters, streaking, peeling paint, or water staining of the wood that the gutters are fastened to (the fascia board), water spilling down a wall during a rainstorm, signs of corrosion or rusting on the gutter, gutters sagging, twisting or falling away from the fascia board they are fastened to, mould or peeling paint on the side of the house or moisture problems in a basement or crawlspace (if your perimeter drains are o.k.). These can all be signs of gutter problems and should be corrected before your home is damaged.