Our gutters with the smaller extensions receive the water but a few other places, overload the gutters apparently. Very minor air currents etc push it back onto the coach. The gutters should be bigger and the spouts a lot longer which is impractical. Dams of Dicor is not a great idea. The best situation would be permanent non bleeding sealant. Also, it would save 700.00 or 800.00 having everything up top resealed every year or two or three. Yeah I know we can do it ourselves if I was still young and spry and balance wasn't awry.