Had my roof done 6 years ago and now have a 2 foot rotten spot where a valley meets the soffit. The guy didn’t use any flashing and just put silicone in the gap. Now water gushes under the shingles and into the overhanging soffit. I never noticed it until now. I talked to the guy but can tell he’s going to not man up and cover his work. How long do you think they should be responsible? This is 100% because he took a short cut.