I have a covered patio that was recently done and has a leak between the roof and the fireplace. The person that built the patio came and tried to patched it up with silicone and roof cement but it still leaks. I'm worried if they don't fix it soon I will start to have mold problems in the wood. What do you suggest I do in fixing the problem? I feel they need to come and take it completely apart on the corner where it is leaking and see where it is coming from.