Roof lifespan claims vary wildly. Here is what to actually expect from each common material in South Carolina's climate.
Architectural asphalt shingles
25-30 years in our climate with a correct install and adequate ventilation. Three-tab shingles average closer to 18-20.
Standing seam metal
40-50 years is typical, with some systems pushing 60+. Exposed-fastener metal averages closer to 25-30 due to fastener wear.
TPO and EPDM (commercial)
20-30 years for quality membranes installed correctly. Annual maintenance significantly extends both.
What shortens a roof's life
Poor ventilation is the number-one killer. Improper flashing is second. Walking on the roof unnecessarily is third.

