maybe you guys know

[todpod]

Is drywall required by code or can I use other materials to cover walls and ceilings.  By code I think PA uses the IBC 2006. Thanks todd

[ScottA]

I think it's required in some areas for fire protection. You can put other materials over the drywall.

[MountainDon]

Normal living spaces do not necessarily require sheet rock, but that could also vary with local rules. T&G wood, 1xsomething is allowed here except for furnace rooms where you need 5/8 type X. The IRC says wood is okay as long as it's thick enough, otherwise sheet rock under it is required.

There are a couple PA members, perhaps they will see this and know the answer.

[Don_P]

The underside of enclosed stairs has to be 'rocked, and its a good idea even if the area isn't a closet. This is to buy them time in a fire.