Can anybody help. Our house is the end of a row of four, and we are on a slope. None of the other houses have a downspout to take the water from the roof and it all gushes down to ours and in heavy weather it is like a waterfall from our gutter splashing on the side of the house. Every so often we have to get up and clean out the gutter but even when it's clear the volume of water is too great to cope with. Can anybody advise?