❓ FAQ
+What joist spacing for composite?
12" on center for composite decking (it flexes more than wood). 16" OC is fine for wood decking.
+How deep do footings need to be?
Below your local frost line. 42" in cold climates (MN, WI), 24" moderate, 12" in the South. Check local code.
+Do I need a permit?
Yes for most decks over 30" above grade. Attached decks often require engineering for the ledger board connection.
+How long does composite last?
25-30+ years with zero maintenance. Most brands offer 25-year fade and stain warranties.