How MEP Contractors Make Money With Prefab | Ep. 395

The biggest projects in the country are going up in remote places. Data centers and chip plants land where there’s cheap power and open ground, not where the workforce lives. Jensen Huang has said the trades are a bottleneck for NVIDIA’s growth, and Jake sees that same demand across his customers.
So the smart contractors move the work, not the people. They build assemblies in a shop where crews already live, then ship them to the site. Jake calls it geographic arbitrage. His West Coast customers aren’t building hyperscale projects in Seattle or San Francisco. They’re fabricating the pieces there with local labor that would otherwise be on the bench.
The shop also changes who can do the work. A fab shop has a fixed address and steady hours, seven to three. That brings back people the field pushes out. The parent doing school pickup. The person caring for an aging mom or dad. Walk into a good shop and you see a deeper, steadier workforce than you’d ever keep chasing jobs across town.

What you’ll learn:

• Why prefab is really a labor strategy, and how “geographic arbitrage” keeps your crews busy
• Why MEP fab is neither manufacturing nor field construction, and why that matters
• How overproducing and carrying too much work-in-progress strands your cash
• Where prefab actually gets won, and it’s in preconstruction, not the shop
• The two biggest money-losers in any fab shop: material handling and rework

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MEP Prefabrication Is a Labor Strategy, Not Just a Production Method

The biggest projects in the country are going up in remote places. Data centers and chip plants land where there’s cheap power and open ground, not where the workforce lives. Jensen Huang has said the trades are a bottleneck for NVIDIA’s growth, and Jake sees that same demand across his customers.

So the smart contractors move the work, not the people. They build assemblies in a shop where crews already live, then ship them to the site. Jake calls it geographic arbitrage. His West Coast customers aren’t building hyperscale projects in Seattle or San Francisco. They’re fabricating the pieces there with local labor that would otherwise be on the bench.

The shop also changes who can do the work. A fab shop has a fixed address and steady hours, seven to three. That brings back people the field pushes out. The parent doing school pickup. The person caring for an aging mom or dad. Walk into a good shop and you see a deeper, steadier workforce than you’d ever keep chasing jobs across town.

Prefab Isn’t Manufacturing and It Isn’t Construction

Here’s the mental model Jake wants every contractor to hold. “Are you doing construction in a warehouse, or are you doing manufacturing?” The answer is neither.

Prefab is something in between. Some of the job rhymes enough to standardize. Pre-wired electrical devices. Six thousand identical clevis hangers. Eight hundred matching heat exchangers on a data center. Those get jigs, fixtures, and automation. Other parts are one-off, like a conduit rack that fits one corridor and nowhere else. Those stay bespoke.

The skill is sorting which is which, then building a different process for each. Treat the whole job like a widget factory and you’ll get burned.

The Trap: Running the Machine All Day

Jake gave the clearest picture of how prefab goes wrong. You buy an efficient tool, maybe an automated welder, and you start to feel like you only make money when it runs all day. So you keep feeding it. Soon you’re sitting on piles of half-finished pipe.

Then the design changes, or the crane isn’t available this week, and all that work is stranded. “You can lose a lot of money on prefab,” Jake says. Overproducing is one of the fastest ways to do it.

Agility Beats Perfect Drawings

Contractors love to blame the drawings. If the plans were perfect, the job would be easy. Jake thought that way too, until a construction manager at a big pharmaceutical company set him straight.

“If the FDA approves a process that saves us one percent, I’m going to drive that change tomorrow,” the owner told him. “If you want to be the best contractor, you figure out how to adapt.” Changes are coming. The contractors who win build a system that flexes, not one that demands locked drawings and a frozen schedule.

That’s where work-in-progress comes in. The less WIP you carry between design and install, the less each change hurts. Measure it. Keep it tight. It’s the same just-in-time thinking that runs every good factory.

Where Prefab Really Gets Won: Preconstruction

The decisions that make or break prefab happen early, in design development, not on the shop floor. Jake is seeing contractors add a prefab coordinator who sits with the owner and the GC during preconstruction and asks the hard questions.

What can we standardize? Take hospital head walls or bathroom pods. The architect can keep them looking different on the outside while the contractor standardizes the med gas, the waste, and the venting behind them. Now it’s a module.

How will we join it? Weld in the shop, use groove couplers or press fittings in the field. How big can the assemblies get? That depends on your trucks, your bridge heights, your crane picks. All of it has to bake in before anyone cuts pipe.

The Two Biggest Money-Losers: Material Handling and Rework

Ask Jake where contractors go upside down and he names two things. Material handling and rework. Underneath both sits one root cause. No measurement.

Some shops handle the same pipe five times before it ships. Pick it up, cart it, set it down, move it again. Put a stopwatch on it and you’ll find they’ve added twice the labor they’d have spent just welding it in the field. You can’t see that unless you roll fab labor and material back up to your estimate.

Rework comes from not knowing what to build when, from losing track of material, and from stranded inventory when changes hit. Ship a pipe spool with flanges that have to mate within a sixteenth of an inch, get it wrong, and you’re redoing expensive work.

Hire Manufacturing Discipline

Jake’s favorite trend is contractors hiring out of manufacturing. One customer brought in a guy who ran fab for Caterpillar. Pair that operations discipline with real construction knowledge and you get a shop that measures, improves, and manages risk.

“None of these folks went to school to learn operation science,” Jake says. That’s the gap. Marrying the two mindsets is what separates his best customers from everyone else.

Connect with Jake Olsen and Stratus

Jake Olsen is the CEO of Stratus, a digital fabrication platform built for MEP contractors, now in its tenth year with hundreds of contractors on the software. If you run fab, or you’re thinking about starting, this one will save you money.

Want to go deeper with Jake? 

He’s active on LinkedIn and happy to talk with any MEP contractor thinking through fabrication. 

Connect with him at linkedin.com/in/mrjakeolsen, see what Stratus does at stratus.build, and follow the company at linkedin.com/company/stratus-build. If you want the data behind this conversation, check out the State of MEP 2025 report and Stratus Innovate 2026.

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