A Four point Inspection is sometimes required by Insurance Companies for the purpose of issuing a Home Owners Insurance Policy. A certified inspector will visit the home, and examine the crawl space, electrical system, plumbing, and roofing. They will put their findings into a written report including photographs.
Recently one of my customers was asked to have a four point inspection performed on a house he is attempting to purchase. A lovely vintage home, with large wrap around porch located on a tree lined street situated on a corner lot. The Inspector came, took pictures and issued a written report.
Crawl Space- is serviceable. 
Plumbing is serviceable.
Electrical is serviceable.
Roof- serviceable, and estimated to have 5-7 years of life remaining.
Under notes: There was this comment:
The roof is original and is 94 years old. The house was built in 1915.
Now that is what I call a lifetime guarantee! Image that a 94 year old roof that "still has 5-7 years of life left"
St. Cloud Florida Real Estate Broker/Associate,
St. Cloud Florida Homes For Sale, Buying HOMES In St. Cloud Florida, Real Estate Agent specializing in Osceola County Homes ,Townhomes, vacation properties, land, & Investment Properties-Allison Knows Osceola County, Fl.
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This has to be one of the oldest roofs left in St. Cloud, Florida on a vintage home- noteworthy becasue of the 3 hurricanes which rolled through Central Florida 5 years ago- almost every home got a new roof back then! But this one- has no issues.