In an open Panel Systems, the inside surface of the wall is left exposed so plumbing, insulation, and interior finishes can be applied at the job-site.
This refers to the outside surface of the exterior wall panel that is covered with sheathing or insulation board. It is the structurally engineered panels that form the inside load-bearing leaf of the external wall, comprising studs, rails, sheathing on one face and a breather membrane.
While the open panel system is like closed panel system being quick and easy to install providing a weather tight structure within a matter of days, the inside surface of the wall is left exposed so plumbing, insulation, and interior finishes can be applied at the job-site.
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