The answer to 'underlayment clogged gutters' is that a clogged gutter can often be caused by underlayment material getting trapped in the gutter system. This can happen when the roof is being repaired or replaced, and the old underlayment is not properly cleaned up. The symptoms of this issue include water overflowing the gutters during heavy rain, and the gutters becoming visibly clogged with debris.
To fix this problem, you'll need to thoroughly clean out the gutters to remove any underlayment material or other debris. This may require using a gutter scoop or other tool to manually remove the clog. In some cases, the gutters may need to be completely cleared and flushed to get them working properly again. If the clog is severe or difficult to access, it's best to call a professional roofing contractor to handle the job.