Cleaning a new laboratory building: what we learned at NIH Rocky Mountain Labs
A federal high-containment research facility is not an office building. Access, documentation, lint-free finishes, and how a cleaning crew fits into a GC's commissioning schedule.
Valerie Hixon · Owner, Kleen Sweep · · 8 min read
Most of our work is houses. Some of it is offices, clinics and schools. And some of it is the kind of building where the general contractor hands you a security briefing before you see the floor plan. Cleaning Biosafety Level 4 laboratory space at the NIH Rocky Mountain Laboratories campus in Hamilton was that kind of job, and it changed how we approach every commercial clean since.
We are limited in what we can describe about the facility itself, and that is appropriate. What we can share is what the job demanded of a cleaning crew, because it applies to any laboratory, clinic, cleanroom or food-processing turnover.
Access is a process, not a door
On a residential job, the superintendent hands you a lockbox code. On a federal campus, every crew member is pre-cleared, badged and escorted. Tools and products are inventoried in and out. The schedule is set weeks ahead, and if a crew member is sick, the replacement cannot just show up.
What we learned: send the crew list early, keep it stable, and plan for the days when access takes an hour before any cleaning starts. We now ask every commercial client about access on the first call, before we talk about square footage.
Every product is documented
We already carried safety data sheets for everything on the truck. On the RML project, every product had to be submitted and approved before it entered the building. Some of our standard products were not acceptable; residue from certain cleaners can interfere with the surface treatments and the commissioning tests that follow construction.
What we learned: a laboratory final clean uses a shorter product list than a house, and it is set by the building, not by us. We build a project-specific product list for every lab and medical job now, with SDS sheets, and submit it with the bid.
Lint-free is a specification
High-containment lab space has sealed floors, coved bases, monolithic wall and ceiling systems, stainless casework and gasketed pass-throughs. Every surface is designed to be decontaminated. That means every surface has to be handed over with nothing on it: no cotton lint from a cloth, no fiber from a mop head, no residue film, no dust in a corner that a decontamination process will later find.
What we learned: microfiber and lint-free wipes only, a documented wipe-down sequence, and HEPA vacuuming with the filter changed for the job. We also learned to clean from the cleanest zone outward, which is the reverse of how a house is cleaned, so that nothing is tracked into finished space.
You are part of commissioning
In a house, the final clean is the end. In a lab, it is a step in the middle. After the construction clean come the pressure tests, the airflow balancing, the fumigation and the validation of the containment systems. A cleaning crew that leaves residue, moves a gasketed panel or scuffs a sealed floor creates a problem that shows up weeks later in someone else’s test.
What we learned: ask the GC what comes after us, in detail, and clean to that standard rather than to a visual one. Our walkthrough with the superintendent was a line-by-line review against the commissioning checklist, not a glance around the room.
The flag sheet still applies
Even on a federal lab building, the flag sheet earned its place. Scuffed epoxy at a doorway, a casework drawer that did not seat, sealant that had not fully cured at a penetration. The difference was that the sheet went to the GC’s quality control lead, with photos, and became part of the project record.
What it means for other commercial clients
If you are a general contractor turning over a clinic, a dental office, a school kitchen, a veterinary surgery or a food facility, the same principles apply at a smaller scale:
- Tell us about access and security early.
- Give us the list of what is not allowed in the building.
- Tell us what tests or inspections follow the clean, and we will clean to them.
- Expect a documented product list and a documented walkthrough.
We came home from Hamilton with a shorter product list, a longer checklist, and a better understanding of what “clean” means when someone else is going to test for it. Every commercial client since has gotten the benefit.
