Wall Sheating Question

[jrocco]

Quick question on Side Walls.

I am building a 24' X 40' Workshop and for siding, using 1/2" X 4' X 8' Insulation Panels (Expanded Polystyrene with Aluminum Backing) and 5/16" X 4' X 8' Hardie Select Sierra Panels.

Do I also need to put OSB sheating on the studs or can I just use the Insulation Panels and Hardie Panels?

Thanks in advance.

 

[Red05GT]

You could use one sheet of plywood or osb on both sides of each corner or the cut in metal strap
bracing is another option. I would be concerned that any lateral racking would buckle
or fracture the hardie board without this additional bracing.

 

[red]

Really depends on local building code. In my area building inspector would not allow 5/8 T-11 siding without sheating underneath. (over kill but my opinion doesn't matter with Building dept)

 

[WNYflyer]

jrocco,

- Hardie installation guide says the wall studs must be braced which means the Hardie cannot be assumed to act as sheeting.
http://www.jameshardie.com/pdf/install/hardiepanel-hz5.pdf

-Typically each wall stud needs to be braced by sheeting (osb or plywood typically) anyways to keep them from buckling when loaded.

- Sheeting will also provide the lateral bracing for the building (aka a "shear wall"). Let-in or strap bracing is also a form of lateral bracing for the whole building but those don't brace each individual wall stud.