Min stairs width

[hotinhawaii]

Pressure treated stringers with wood preservative on the cuts, prime and paint stringers before install, flashing tape on top of stringers to seal around holes made by attaching treads. Treads made from composite decking. Same treatment goes for exposed decks. I've been doing it like this for years and can't imagine what else I could've done to preserve the stairs. Time will tell. Green or brown wood preserver, not Boracare.