The client had initially called us because of a frequently overflowing eavesthrough.  The design of the Owl Lane townhomes in Cabbagetown Toronto was such that water from two flat roofs was draining into one small eavestrough and down the single downspout.  We correctly suspected the amount of water was too great to be draining into such a small eavestrough and single downspout.  However, the main contributor to the overflow was the heating cables that the previous contractor stuffed into the drain.  Despite regular cleaning of eavesthrough some leaves still go into the downspout and rested on top of the bundled heating cables.  At times of rain the downspout was full of water all the way to the top and the eavesthrough was overflowing.  We remedied the problem by removing the heating wires, and properly installing a new downspout and the largest possible eavestrough and running new heating cables.  No more overflowing eavestrough!