14-gauge: standard option
A practical standard frame for many everyday residential and storage uses, with up to a 5-year rust-through warranty when requirements are met.
12-gauge: premium option
A premium frame choice with up to a 20-year rust-through warranty when requirements are met.
How to decide
Consider building size, location, exposure, use, expected ownership time and warranty goals.
Engineering, warranty, permitting and installation requirements can vary by project. Final written order documents and applicable local requirements control.