A lot of homeowners dont understand that you dont always have to replace the roof if you ever have a leak. Simple maintenance can save you thousands of dollars, however, that maintenance needs to be performed by a highly skilled and experienced professional. Pipe boots wear out from UV rays in 3-5 years. Sealants dont last much longer. Those are 2 simple fixes. Some are improper installation by the previous roofer. We know the manufacturers instructions and the roofing code. We are the guys who get called out to correct work from other roofers.