On most commercial buildings a roof leak is an inconvenience you mop up. Over a pharmaceutical compounding suite, a clinical lab, or a research bench, a single drip can ruin a batch, contaminate a sample set, short out instrumentation worth more than the building section it sits in, and trigger a documentation event. That difference in stakes drives everything we do on these roofs. We don't aim for "watertight enough." We design and sequence so there is no water path to the sensitive space below, full stop, and we document it so the facility can prove it later.
Spokane has a real and growing life-science footprint, and it's concentrated. The University District just east of downtown anchors it — the WSU Elson S. Floyd College of Medicine, the WSU Health Sciences Spokane campus, and Gonzaga sit within a few blocks of each other across the Spokane River, and the surrounding blocks have filled in with research labs, biotech tenants, and diagnostic operations. South of there, medical and lab tenants ring the Deaconess and Sacred Heart hospital districts on the lower South Hill. We work these buildings knowing the equipment underneath the deck, not just the deck.
Cleanroom HVAC Turns the Roof Into a Penetration Field
The thing that makes lab roofing technical is the mechanical density up top. Cleanroom air handlers maintaining ISO-classified spaces, fume-hood and solvent exhaust stacks, biosafety exhaust with HEPA banks, process chillers, and building-automation conduit all pierce the membrane, often clustered tight around the critical rooms. Each curb and penetration is its own flashing detail and its own documented item. And because those rooms run on pressure differentials, any work near a supply or exhaust connection can disturb the balance, so we coordinate that work with the facility's MEP team and confirm pressure recovery afterward rather than assuming it.
Exhaust Chemistry Eats the Wrong Membrane
Lab exhaust isn't clean air. Solvent and acid vapor condenses on stack exteriors and drips onto whatever membrane sits downwind, creating localized chemical attack that a standard warranty won't touch. For pharmaceutical and lab roofs we lean on 60-mil PVC for its chemical resistance, and in the zones immediately around solvent or acid stacks we verify the specific exhaust chemistry with the facility before committing, sometimes stepping up to a more chemically robust detail right at those stacks. Standard TPO near a solvent exhaust is a mistake we plan around.
Spokane's Snow Load Sits Right Over the Equipment You Can't Risk
Then there's the climate. Spokane carries genuine snow load and long freeze-thaw cycles, and on a lab building the consequence of an ice dam or a clogged scupper isn't a stained ceiling tile — it's standing meltwater backing up over a cleanroom or an instrument suite. We design drainage, overflow, and the insulation/vapor package for our winters specifically, and we keep snow-and-ice response on the table because a flat lab roof in Spokane needs both primary and emergency drainage that actually works in February.
Vibration-Sensitive Equipment Below Changes How We Work Above It
A lot of what sits under a lab roof doesn't tolerate disturbance well. Analytical balances, electron microscopes, mass spectrometers, and imaging equipment are sensitive to vibration, and the heavy fastening, tear-off, and material handling that come with a reroof can register on instruments two floors down. On these buildings we coordinate the noisy, high-vibration phases with the facility around when sensitive work is scheduled, favor methods that limit pounding over critical suites, and stage material so we're not running loaded carts directly over the most delicate rooms. It's the kind of consideration that doesn't show up on a warehouse job but matters enormously when a single ruined run can cost a research program weeks.
Access and Documentation Are Part of the Scope, Not an Afterthought
Regulated facilities control who gets on site and what gets recorded. Crews may need advance credentialing and background screening before they ever mobilize, and the closeout package these owners expect goes well past a typical warranty card. We build the access coordination into pre-construction and assemble documentation — submittals, daily reports, manufacturer install records, system certifications, warranty registration — to fit the facility's quality system, because for these clients the paper trail is part of the deliverable.
- Identify the equipment and rooms under each roof zone before scoping the work.
- Coordinate cleanroom pressure and HVAC impacts with the facility MEP team.
- Verify exhaust-stack chemistry before specifying membrane near solvent and acid stacks.
- Design drainage and overflow for Spokane snowmelt over sensitive spaces.
- Handle crew credentialing and deliver a closeout package built for a regulated audit.
Pharmaceutical & Laboratory Roofing Questions
How do you keep a roofing project from contaminating a cleanroom?
Any penetration work near cleanroom HVAC supply or exhaust gets scheduled with the facility MEP team, ideally inside a planned maintenance window, and we confirm pressure-differential recovery once it's done. We also control debris so nothing enters the air paths above the cleanroom envelope. The goal is no disturbance to the controlled space, and we verify it rather than assume it.
What membrane do you use where there's corrosive lab exhaust?
Sixty-mil PVC is our baseline for labs because it's the most chemically resistant common single-ply. Around solvent or acid exhaust stacks we confirm the exhaust chemistry, check it against the manufacturer's chemical-resistance data, and detail those zones for the specific attack. We do not put standard TPO next to a solvent stack.
Do your crews need clearance to work on these buildings?
Often, yes. Regulated pharmaceutical and lab sites may require advance contractor credentialing and background screening, and some areas have escort or access restrictions. We start that process during pre-construction so the crew is cleared before the start date and the access plan is documented up front.
How do you protect the building during Spokane winters?
We design primary and overflow drainage and the insulation and vapor package for our snow load and freeze-thaw, so meltwater can't back up over sensitive spaces and the dew point stays inside the assembly. Snow-and-ice response is built into the plan because a flat lab roof here has to drain reliably in the worst part of winter.
What documentation do you provide at closeout?
Typically contractor qualification records, the site safety plan, reviewed submittals, daily work reports, manufacturer installation documentation, system certification where required, and warranty registration — formatted to fit the facility's quality management system so it can be produced during an audit.