leaks in high wind

I just had a tin roof installed on my 100+ year old home last year. Every time we have a rainstorm with high winds the roof leaks from the ridge. Is this common with tin roofs? The contractor did a repair to the area around a vent pipe and assured me that the roof was properly installed. What can be done to fix this? I have water damage to an upstairs wall where the water was running down from the attic.