The Commercial AV Rough-In Checklist: What to Handle Before Drywall Goes Up
There’s a moment on every build-out where the framing is up, the trades are moving fast, and someone says “we’ll figure out the TVs later.” That sentence is expensive. A commercial AV rough-in checklist exists because once drywall closes, every wire you didn’t run costs five times as much to add, and some of them can’t be added at all without cutting into finished work. The good news is that the list isn’t long or complicated. It just has to happen at the right time. Here’s what belongs on it, who’s responsible for each piece, and where projects most often go sideways.
What Is a Commercial AV Rough-In Checklist?
A commercial AV rough-in checklist is the set of infrastructure items that must be installed before walls and ceilings close: conduit and cable pathways, structural backing for displays, dedicated power at equipment locations, network drops, and a designated space for the equipment rack. None of it is visible in the finished space, and all of it is nearly impossible to add cheaply once the drywall is hung.
Think of it as the plumbing for your technology. The fixtures come later. The rough-in decides whether they’re even possible.
Why the Pre-Drywall Window Matters So Much
Most business owners assume AV is a finish item, like furniture or signage. It behaves more like electrical or mechanical work, because it needs pathways, power, structure, and coordination with three other trades.
The window is short. On a typical tenant build-out, the useful rough-in period runs from the day framing is inspected to the day drywall starts, and that can be less than two weeks. Miss it and your options narrow to surface raceway, exposed conduit, or opening finished walls. All three are visible, all three cost more, and all three make a new space look like it was renovated twice.
Fast-turn projects feel this hardest. Restaurant, bar, and retail build-outs often run compressed schedules where framing, drywall, and finishes stack up within a few weeks, and the AV scope is frequently the last thing finalized because the operator is still deciding how the space will be used. That’s exactly backwards from how the trades need it.
There’s a scheduling reason too. Low-voltage work in Nashville requires its own trade permit and inspection. Metro’s building permit process notes that low-voltage wiring needs a separate permit and inspection, pulled by a licensed subcontractor after the building permit is issued. That inspection happens while walls are open. If your AV scope isn’t defined yet, it can’t be inspected on schedule, and the drywall crew doesn’t wait.
The Commercial AV Rough-In Checklist, Item by Item
Here’s the working list. Not every project needs every line, but every project should have made a decision about every line.
Pathways and Conduit
Every device location needs a route back to the equipment rack. In some walls that means conduit; in others, open cable through accessible ceiling space is fine. The distinction matters in plenum ceilings, where cable has to carry a plenum rating, and in fire-rated assemblies, where penetrations have to be properly firestopped.
Pull strings are the cheapest insurance in construction. A stubbed conduit with a string in it turns a future upgrade from a demolition project into an afternoon. Federal guidance on telecommunications pathways and spaces treats pathway planning as a design-phase activity for exactly this reason.
Structural Backing and Blocking
A large display needs plywood backing or steel blocking between studs, installed while the wall is open. Same for projector mounts, ceiling-suspended speakers, and camera brackets.
This is the single most common miss we find, and it’s the one with no graceful fix. Toggle bolts in drywall are not a mounting system for a 90-inch display. If a video wall is anywhere in your plans, the structural conversation needs to happen early, because LED wall installation involves real weight, real depth behind the mounting surface, and service access that has to be designed in rather than discovered.
Power at the Right Places
Displays need power behind them, not on the wall next to them. Racks need dedicated circuits sized for the equipment going in, plus room for what gets added later. Cameras, touch panels, and some speakers run on Power over Ethernet, which shifts their power load onto network switches in the rack rather than the wall.
Get the receptacle locations onto the electrical drawings. An outlet six inches from where the display mount lands is the same as no outlet at all.
The Equipment Room Nobody Planned For
Every commercial AV system has a brain, and it has to live somewhere. That somewhere needs floor or wall space, power, network access, ventilation, and a door people can actually get through with a rack in hand.
Size it for growth, not for today’s equipment list. Systems accumulate: a signage player here, a network switch there, a second amplifier when the patio gets speakers.
Closets get claimed fast during a build-out. If AV doesn’t stake a claim during design, the equipment ends up in a janitor’s closet with no airflow, and you spend the next five years replacing overheated gear.
Network Drops and Cable Counts
Modern AV runs on the network. Conferencing systems, cameras, control processors, signage players, and access points all need drops, and the count is almost always higher than people guess.
Pull more than you need. Cable is inexpensive during rough-in and expensive afterward, which is the whole logic behind treating structured cabling as infrastructure rather than as an accessory to whatever devices you’re buying this year.
Camera Locations and Sightlines
If any room will host hybrid meetings, the camera position is a rough-in decision, not a mounting decision. Where the camera sits determines whether remote participants see faces or profiles, and it depends on the table layout, the display position, and which wall gets the window glare.
Cameras also need a drop and often a power source at ceiling or wall height that nobody put on the drawings. Deciding this before millwork is ordered is far easier than discovering that the only viable camera wall is the one the casework now covers.
Ceiling Coordination
Ceiling space is the most contested real estate on a job site. Sprinkler heads, light fixtures, diffusers, ductwork, structural members, and your ceiling speakers and microphones all want the same square footage.
Speaker layout isn’t decorative. Coverage depends on spacing relative to ceiling height, and a layout that gets rearranged on site to dodge a sprinkler head will have dead spots. Coordinated ceiling drawings prevent the argument, and they prevent the compromise.
Mounting Heights and Accessibility
Wall controls, touch panels, and card readers have to be reachable. Under the 2010 ADA Standards, operable parts on accessible elements generally have to sit within specified reach ranges, with a maximum side reach of 48 inches above the floor.
Assembly spaces bring an additional consideration. Where audible communication is integral to a space and audio amplification is provided, an assistive listening system is generally required. If your project includes a training room, auditorium, or worship space, this belongs in the design conversation and not in a punch list. We’re not attorneys, so confirm the specifics with your architect or code official.
Who Owns Each Item on the Commercial AV Rough-In Checklist
Most rough-in failures aren’t technical. They’re gaps in responsibility, where everyone assumed someone else had it.
The general contractor owns the schedule and the coordination. They decide when the AV crew gets access and they arbitrate ceiling conflicts.
The electrician typically owns conduit, boxes, and line-voltage power. Whether they also pull low-voltage cable varies by project and needs to be settled in writing, not assumed.
The framer or carpenter installs blocking and backing, but only if someone tells them where and gives them dimensions.
The AV integrator produces those dimensions. That means device locations, mounting heights, backing sizes, pathway routes, cable schedules, rack elevations, and power requirements, delivered in a form the other trades can build from.
The owner decides what the rooms need to do. Nobody else can answer whether the boardroom needs to support hybrid meetings with remote participants, or whether the lobby display is signage or a full conference room AV extension.
The cleanest projects put this in a simple matrix before rough-in starts. One line per item, one name next to it. It takes twenty minutes and saves weeks.
Five Rough-In Mistakes That Cost the Most
Deciding on equipment before deciding on rooms. Specifying a display model tells you nothing about whether the wall can hold it. Function first, then infrastructure, then hardware.
Treating AV as a finish trade. By the time finishes are being selected, the rough-in window has closed. AV belongs in design development alongside electrical and mechanical.
No pull strings. Conduit without a string is a pathway you’ll have to fight to use later.
Underestimating the rack space. Racks generate heat and need service clearance. A closet that fits the equipment exactly is a closet that fails in July.
Skipping the site walk before drywall. A thirty-minute walk with the GC, the electrician, and the AV lead catches more problems than any drawing set. Do it while you can still see the studs.
Getting It Right the First Time
None of this requires a bigger budget. It requires sequence. Every item on a commercial AV rough-in checklist is cheap when the walls are open and expensive when they aren’t, and the difference between those two prices is usually a single conversation that happened at the right time.
If you’re planning a build-out, renovation, or tenant improvement in Middle Tennessee, we’re happy to walk the space and put together the rough-in requirements your other trades can actually build from. That’s a normal part of how we approach AV installation, and it costs a lot less than fixing it later. Get in touch and we’ll take a look at your drawings.
Frequently Asked Questions
When should an AV integrator get involved in a construction project?
During design development, ideally around the same time the electrical and mechanical drawings are taking shape. That’s early enough to get device locations, backing, conduit, and power onto the construction documents rather than requesting changes later. If the project is already framed, involvement is still worth it, because the pre-drywall window is the last chance to build infrastructure into the walls instead of onto them.
What happens if we skip AV rough-in entirely?
You end up with three options, all worse than planning ahead. You can run surface-mounted raceway, which is visible and looks like an afterthought. You can cut into finished walls and pay for patch, texture, and paint. Or you can accept a reduced system that works around the infrastructure you have. Wireless helps in some rooms, but it doesn’t solve power, mounting structure, or rack location.
Does low-voltage AV work need a permit?
In Nashville, low-voltage wiring generally requires a separate trade permit and inspection, pulled by a licensed subcontractor after the building permit is issued. Requirements vary by jurisdiction and by scope, and rules change, so confirm the current process with Metro Codes or your local permit office. As a practical matter, ask any integrator you’re considering whether they pull their own permits and are licensed and insured for the work.
Who pays for conduit and blocking, the GC or the AV company?
It depends entirely on how the scope was written, which is why it needs to be explicit. Commonly the electrician provides conduit and boxes and the carpenter installs blocking, working from dimensions the AV integrator supplies. Sometimes the AV contractor carries all of it. What matters is that one party has it in writing before rough-in begins, because assumed scope is where change orders come from.
How much extra cabling should we pull during rough-in?
More than the current device count requires, though the right number depends on the space and how you expect it to grow. The reasoning is economic rather than technical: labor and access make up most of the cost of pulling cable, and both are already paid for while the walls are open. Adding spare capacity during rough-in is a small line item. Adding a single run afterward is a project.