Rough-In inspections | Explained

In-home constructions rough-in inspections are never overemphasized or neglected, as it forms lines of various assessments.

The term “rough-in” in construction world refers to a construction stage where all mechanical, plumbing, electrical and framing works being installed. This is where most of the work is initially reviewed by the building inspector before its covered by insulation and drywall.

Rough installation starts Once footings are cured, framing can begin. Once the building is fully framed, electrical, mechanical and plumbing can be installed.

Rough-in inspections Checklist

Rough work should be coordinated so that subcontractors do not interact; planning and coordination help maximize efficiency and productivity during this building phase. 

Rough-in Framing inspection

rough in framing

The first phase of the inspection is the semi-structured one. At this stage, the house will have the doors and windows already installed. One must examine hundreds of items literally before framing inspection. Here is your chance to look at structural objects, point loads, walls, bracing, and fire blocking before the drywall rises. 

Engineering Inspection: For any structure design by an engineer , the building code requires The engineer of record to provide a structural observation. The building inspector will ask for the report prior conducting the framing inspection.

Checklist Rough-in: All soil, wastes, and vent piping must be carried out after roofing, framing, fire blocking, and bracing and before installation of wall or ceiling membranes.

Plumbing rough-in inspection

rough in plumbing

At this point, your plumbing, both vent, water and gas lines, will be installed. It is here that we install all hot-water pipes, cold-water pipes, and gas lines for equipment. Despite an initial leak test, these pipes are capped off for other phases of your project before installing the fittings. 

This means that all water supply and drain lines are already installed or in place, and the connections are made. However, no sinks, faucets, or other fixtures and elements have yet been established.

Checklist: All soil, wastes, and vent piping must be carried out after roofing, framing, fire blocking, and bracing and before installation of wall or ceiling membranes.

Electrical Rough-in inspection

rough in electrical

Electrical lines are run after HVAC and plumbing. Through the layout of pipes, connector boxes, cabling and electrical panel installation, grounding, and overhead wire services.

During the rough-in, this cable is not connected to any device, outlet, or switch. This step is the last in the rough-in because workaround conducting and plumbing are the easiest. 

Gas Checklist : Rough Piping inspection: to be carried out after installation of any new piping authorized by the permit.

Mechanical Rough-in Inspection (MRI)

rough in mechanical

This is the rough-in inspection of every mechanized part that will be hidden in the construction. Before closing up the system again, must run some test.

Mechanical systems must pass rough-in testing before they are approved for production and must be critically reviewed. The rough mechanical system is mostly used to install your HVAC system, bathroom exhaust fan and kitchen hood.

Ductwork during this phase is established. Due to its size and the possibility of electrical or plumbing blocking its path, installing the duct first is essential.

Please ensure that furnace is in good condition before the installation begins. Heating hot water also requires a pressure test to identify hot water leaks. Do get in touch with the HVAC sub to let them know that the room is “under test”.

Related: For detailed building inspections list from start to finish

Rough-in the inspections layout

Rough-in inspection is the stage of a building project in which different mechanical, electrical, and plumbing works are checked. Once the framing is complete, the rough construction stage starts.

This is when lines are drawn up, but final connections are made after other project phases have been completed. During the construction phase, ductwork, plumbing, and wiring are installed to ensure space restrictions or accessibility problems are resolved. 

The project superintendent may invite you to walk through your project to examine its most important mechanical features at this point of construction. Before you get drywall, you will have to check the rough framing, electrical wiring, plumbing, and heating/AC systems. 

Need To Begin With a Plan 

You can not start rough-in without a ready plan. The architect or engineer creates this plan. It outlines where everything goes and estimates where all lines should go. Before beginning any rough work, contractors and subcontractors need to understand and agree on the plan. 

Get an Outline Ready

To begin rough-in exercises, you need to complete the basic framework. That includes your wall framing, floor joists, flooring, ceiling joists, roof rafters, shear walls, etc. The rough-in process can start once the framework is installed according to plan. 


When the rough-in is complete, must inspect it before moving to the next building stage. This inspection will ensure that the code does everything. Once approved, the project can continue to move forward.

The required inspections are scheduled for each approved building permit. The necessary checks are indicated on the license card, the inspection sticker, and the inspection sheet provided when the license is issued.

The representative or contractor of a project may apply for inspections; however, it is the property owner’s responsibility to ensure that necessary checks are carried out.