Bring a non union roofing crew onto a union manufacturing site without planning for it, and you can stop your own plant. Not because anyone is being unreasonable, but because labor jurisdiction, gate protocols, and site work rules are real systems with real consequences, and a roofing contractor who has never worked a union facility will walk into every one of them. I have planned projects on union sites, and the quiet ones were quiet because the labor questions were answered before mobilization, not discovered after.
Know what agreements govern the site
Before you bid the project, understand your own house. What does your collective bargaining agreement say about outside contractors performing work on site? Some agreements contain language about subcontracting maintenance work that plant unions may read to include roof repairs. Whether a full reroof falls under it is a question for your labor counsel, and it is a cheap question to ask early and an expensive one to ask after a grievance is filed. This is exactly the kind of item I flag for owners early: not to answer it myself, but to make sure the right professional answers it before it becomes a dispute.
Union or non union contractor: decide deliberately
- In some regions and trades, signatory roofing contractors are plentiful and competitive. In others, going signatory narrows your bid list significantly.
- A non union roofer can often work a union plant successfully, but it takes protocol, communication with plant labor leadership, and sometimes formal separation measures.
- Whatever you choose, choose it on purpose, with your plant manager, HR, and labor counsel in the room. The worst outcomes come from owners who never realized there was a decision to make.
Gates, access, and separation
On sites with active union workforces, how contractors enter and move through the site matters. Depending on the situation, that can mean designated contractor gates, separate parking and break areas, and clear boundaries around the work zone. The point of these measures is to keep the roofing project legally and practically separate from plant labor relations, so a dispute involving one does not entangle the other. Set the protocol in writing during precon, brief the roofing crew on it, and enforce it daily, because one crew member wandering through the production floor to find a restroom can undo a month of careful planning.
Work rules the roofer must absorb
- Site safety orientation and badging for every crew member, no day one exceptions
- Hot work permits and fire watch aligned to plant procedures, not the roofer's habits
- Coordination with plant maintenance for anything touching mechanical, electrical, or process equipment at the roof line, because on some sites that work belongs to plant trades by agreement
- Delivery scheduling that respects dock jurisdiction and shift patterns
Put it all in precon, in writing
Every item above goes into the preconstruction meeting and the contract exhibits: who does what, which gate, which hours, which permits, who to call when a question comes up at 6 AM. Then somebody has to police it for the life of the project, because agreements drift the moment production pressure hits. That daily enforcement role is part of what owners hire me for. If you have a project coming at a union facility and the labor questions have not been asked yet, start a conversation before you sign anything.
None of this should scare an owner off necessary work. Union facilities get reroofed every day without incident, and plant labor leadership generally responds well to being informed early and treated as stakeholders rather than obstacles. The failures I have seen all trace to the same root: an owner and a contractor who assumed the roof was just a roof.
On union sites, jurisdiction and protocol are part of the roof scope, so settle them with counsel and plant leadership before mobilization.