Insurance claim is getting processed on my roof. I have 3/8" that is 16" on centers that is in good shape. The roofer says that it is inadequate per new codes and I don’t necessarily disagree. It is straight, but having been up there, it doesn’t fell particularly stiff.
Sidenote…what is the 2015 code say about requirements for thickness?
Can the roofer just install the new plywood over the top to get up the required aggregate thickness in this case (i.e. add another layer of 3/8 plywood) or does the old plywood have to come off and be replaced with the code approved thickness for today’s code? Or can he just add another layer of the required thickness plywood or does the who roof deck have to come off?
Roof construction is engineered trusses.