A metal-roof-contractor must also be an expert in drainage systems. In a country with some of the highest rainfall rates in the world, the capacity of gutters and downpipes is critical. A contractor calculates the roof's catchment area to ensure the drainage system can handle peak flow during a storm. Improperly sized gutters lead to overflowing, which can damage the building's eaves ... https://kkroofspecialist.com.sg/metal-roof-contractor/