Any other non-derating Polyiso brands? Alternatives to Thermax

Heyo, I’m unable to find 2″ thermax anywhere. Building in CZ6, 2×6 wall w/blown-in and 2″ rigid exterior specified as thermax. Suppliers locally can get “Rmax” brand…or should I just… Heyo, I’m unable to find 2″ thermax anywhere. Building in CZ6, 2×6 wall w/blown-in and 2″ rigid exterior specified as thermax. Suppliers locally can get “Rmax” brand…or should I just…Read MoreGreenBuildingAdvisor