I have an attached garage. Gable roof above overhead door. Roof is flush with siding. When it rains I get water behind the vinyl siding and in turn water drips from the header of the OHD. I was wondering if extending the roof would help? I am at a loss here. Plus I have 2 other gable ends with a flush roof and I'm worried that water is getting in there too but I just can't see it. I already had to replace the lower half of the front of the garage due to carpenter ants and water damage when we moved in about 3 years ago. Any advice would be greatly appreciated. Thanks Guys!