A Pre-drywall inspection is completed prior to insulation installation, but after ALL trades have completed the “ROUGH-IN”.
Each trade (i.e. electrician, plumber, HVAC etc) is required to obtain a permit, as well as the builder. Each trade will perform all of
the “rough-in” work (typically the work that will be covered by the insulating & drywall process) and then call their respective code-compliance
inspector to have the work approved & signed off, for the “ROUGH-IN” portion of that permit.
Once all of these trades are signed off & approved,
the code-compliance building inspector for that municipality will be requested to perform a framing inspection. This inspector is checking for
code compliance & usually has no regard to the quality or workmanlike condition. Once this inspector signs off, it will be then OK for the builder
to insulate.
Although not impossible it is more difficult to inspect the home once the insulation is installed (especially viewing any work behind the insulation).
An example of items we inspect for are things like: excessively warped framing, missing hardware, headers &/or beams shimmed, nail protector
plates for wiring & pipes, crowning of floor joists, wiring, ducts & pipes properly secured, sill plate properly seated, waterproofing measures
utilized etc.
