How Long Do 30-Year Shingles Really Last in Michigan? How Long Do 30-Year Shingles Really Last in Michigan? How Long Do 30-Year Shingles Really Last in Michigan?By Bill Marvin|2022-12-16T20:16:01+00:00August 19th, 2022|Uncategorized|Did you know that the average roof replacement cost is between $5,619 and $22,00 [...]