Yesterday morning with the melting snow I noticed a leak from our butterfly roof. As I currently have scaffold up, I got onto the roof and shovelled off most of the snow that was on the roof and also in the central channel and this stopped the leak. Should I worry about the leak? It is raining quite heavily today and there doesn't seem to be a leak. It has only happened due to the melting snow and ice. Can the snow and ice get under the tiles?