Need ideas regarding replacement of ridge cap that came on our modular home. It allows snow and rain to be blown into the marriage line/seam and is causing a lot of damage to our interior drywall. We have asphalt shingles and not an extreme slope on our home. Not sure if we need to place more venting on top of roof as well. Any suggestions as we get a lot of snow and we are in an area where we have a lot of strong tornado type winds??? Thanks!