Hail and impact resistance is a key advantage communicated by a quality metal-roof-contractor. Unlike asphalt, which can be easily bruised and compromised by hail, most metal roofing systems, particularly standing seam and stone-coated steel, have the highest UL 2218 Class 4 impact resistance rating. This rating indicates the material can withstand significant hail and flying debris w... https://kkroofspecialist.com.sg/metal-roof-contractor/