Franco from New York asked:
If a non-licensed contractor retarped the valley between two semi-attached houses, how can you tell if it was done correctly? And… What are the minimum materials and procedures or preparations required to make sure he did an efficient job besides the rolls of rubber?
Marty Stout from Go Roof Tune Up had this to say:
The photo shows that it is not installed correctly. You should never have an unlicensed contractor work on your roof. Have a properly licensed and qualified contractor do the job correctly. Your local roofing supply store can most likely recommend someone.
The R-Club map from Project Map It can help homeowners and building owners find licensed contractors in their area:
https://www.rooferscoffeeshop.com/r-club-map-powered-by-project-map-it
Determining whether a re tarped valley was done correctly involves several key aspects. First check the alignment and positioning of the new valley flashing to ensure it channels water effectively. Inspect the seams and connections to ensure they are securely sealed and watertight. Additionally examine the quality of the roofing material used and make sure it is properly secured and overlapped. Its advisable to consult with a roofing professional who can perform a thorough inspection and provide you with a definitive assessment of the works quality and integrity.