This Project consists of removal the existing siding and underlying vapor barrier; remove the window assemblies and plywood sheathing.  Retain existing siding and windows for reinstallation as specified. Inspect the existing rigid and fiberglass insulation for suitability and where unsuitable replace as directed.   Install new plywood sheathing, and windows.  Construct a “rain-screen´ assembly as designed.  Re-install salvaged siding and flashing as detailed.