LP® SmartSide® Strand Substrate 38 Series Panel Siding is a treated engineered wood siding product that's more durable, stable, and consistent than plywood panels. It's easy to recommend for light commercial, shed, or residential applications that require a premium look and the toughness to combat extreme weather. The LP® SmartGuard® manufacturing process improves upon nature, creating siding products that are engineered for strength, performance, and protection against fungal decay and termites. Both 38 Series and 76 Series LP® SmartSide® Strand Substrate Panel Siding may be applied directly to wall studs that are spaced no greater than 16 inches on center. A code-approved, breathable, water-resistant barrier must be applied on the exterior side of the studs and a code approved vapor retarder may be applied to the interior side of the framing, if required by code.