Peeling paint is a burr under the saddle of many homeowners, I’m afraid, and the causes are numerous. The best way to understand why paint peels is to think about all of the things you have that do hold their paint without peeling. How about your car or truck, or your aluminum siding, gutters and downspouts? Even lawn mowers, snowblowers and other outdoor tools fall into that category. So does the outside of my 20-year-old house, which has fiber cement siding. ...