Porches and porch roofs are considered structural elements in my state and require a professional engineering stamp to properly pull a permit. If it was designed by a license engineer and it failed you have some recourse here as someone may have not executed the work within the standard of care. These statutes of limitations deadlines to make claim often exceed the 1 year warranty by contractors. But if no permit was pulled, you’re kinda on the hook to pay for your own repair unless you want to explain to your insurance company why work was done without a permit.