Why strip centers are exposed
Many neighborhood shopping centers around Westminster, Thornton and Northglenn put a restaurant, a salon, a clinic and a small office under one roofline. The suites are separated by demising walls, but the ceiling space above them is often more open than people assume. A wall that stops at the ceiling tile rather than the roof deck leaves a gap that air can cross.
Kitchens also move a lot of air. A hood pulls air out of the cooking line, and the building has to bring replacement air back in. If that makeup air is short, the kitchen pulls from the nearest source, which can be a neighboring suite, a shared plenum or an open door. The odor in the next suite is then not a leak in the usual sense. It is air traveling toward a pressure difference.
Tracing the path
A tenant and property manager can do most of this without special equipment.
Note when it happens
Compare odor times with the restaurant's open hours, the heating or cooling cycle and the days the kitchen runs hardest.
Find where it is strongest
Check near the shared wall, ceiling grilles, supply diffusers, electrical penetrations and any door to a back corridor.
Look up
With permission, a person can lift a ceiling tile to see whether the demising wall continues to the deck or stops short.
Check the roof
Ask the property manager whether the kitchen exhaust fan discharges near the air intake of a rooftop unit serving your suite.
Watch the doors
Notice whether the smell pulses when an exterior or back door opens, which points to pressure rather than ductwork.
Likely paths and how they show up
| Path | What it looks like | Who usually has to act |
|---|---|---|
| Open gap above the demising wall | Odor strongest at the ceiling near the shared wall | Landlord, with a contractor sealing the gap |
| Shared return air plenum | Odor everywhere the same system serves, even away from the wall | Landlord or mechanical contractor |
| Exhaust discharge near an air intake | Odor spikes when the kitchen is busiest | Landlord and the restaurant's operator |
| Negative pressure from the kitchen | Smell pulses at doors, odor flows toward the restaurant side | Mechanical contractor balancing air |
| Dirty hood or duct on the restaurant side | Strong, stale grease smell in the area | Restaurant operator and landlord |
What to bring to the property manager
- A dated log with times, locations and a short description of the smell
- Photos of any open gaps, stained tiles or grease residue near grilles
- A request to review the building's mechanical drawings for the shared plenum
- A question about whether the restaurant's hood and duct cleaning is on a schedule
- A proposal to test with the restaurant's kitchen running and then idle
Common questions
- Is cooking smell in a neighboring suite a code issue?
- It can be, but most are handled through the lease and building maintenance. A city building department can say whether a specific condition is a code matter.
- Will a deodorizer in the ceiling space help?
- Only after the path is closed. Otherwise fresh odor keeps arriving and the treatment is wasted.
General information for Westminster, not a quote or professional advice. In an emergency, call 911.