Location: Adirondack Park in northern NY. During the fall and again in springtime during snow melt and rains the rock foundation of our 1920's Adirondack Park, lakeside home leaks badly through the basement walls (faced by crumbling cement block inside) and up from beneath the poorly sloped (to the sump pump) concrete floor. Some leaks flow like a spring from the walls, especially around the chimney and onto the oil burner furnace. We have a partial, french drain along one outside wall. We only have one section of roof(over the porch) that has gutters. The basement is only under about one third of the house (under 1/2 older section). Please make any suggestions you may have on the least expensive method of correcting these problems. THNX.