Does your roof have snow on it? The one sign that could be costing you hundreds of pounds AS A cold snap hits Basingstoke we have seen flurries of snow settling on walls gardens and our roof tops. But if the snow on your roof is melting faster than your neighbours, it could be a sign of poor insulation, and it can cost you a fortune. A light dusting of snow can tell you a lot about the efficiency of your home and fast melting snow on the roof can be a symptom of inadequate insulation or poor air sealing.