7.4 Physical Facility: Walls, Floors, Ceilings, Lighting & Ventilation
Key Takeaways
- Floors, walls, and ceilings in food preparation, warewashing, and walk-in areas must be smooth, durable, nonabsorbent, and easily cleanable.
- Floor and wall junctures in areas subject to moisture must be coved and closed to no larger than 1/32 inch under the Food Code; many jurisdictions specify a coved base with a defined radius in plan review.
- Light intensity requirements are 50 foot-candles where employees work with food or sharp equipment, 20 foot-candles at surfaces in preparation and utensil areas and in walk-in refrigeration and dry storage, and 10 foot-candles in other areas during cleaning.
- Light bulbs in areas with exposed food, equipment, or single-service articles must be shielded, coated, or otherwise shatter-resistant.
- Ventilation must remove grease, heat, steam, and vapors, and every exhaust hood needs balanced makeup air to avoid negative pressure and backdrafting.
7.4 Physical Facility: Walls, Floors, Ceilings, Lighting & Ventilation
Exam Tip: This section is dense with numbers, and numbers are the easiest points on the exam. Learn the three lighting levels and the coving rule verbatim.
Finish Requirements by Area
The governing standard is that surfaces must be smooth, durable, nonabsorbent, and easily cleanable in the areas where cleanability matters most.
| Area | Floor | Walls | Ceiling |
|---|---|---|---|
| Food preparation | Smooth, durable, nonabsorbent, nonslip, coved at wall juncture | Smooth, nonabsorbent, light-colored, washable | Smooth, nonabsorbent, washable |
| Warewashing | As above; sloped to a floor drain | As above, moisture resistant to splash height | As above |
| Walk-in refrigeration | As above, coved | As above | As above |
| Restrooms | Nonabsorbent, coved | Nonabsorbent to splash height | Washable |
| Dry storage | Cleanable | Cleanable | Cleanable |
| Dining area | Cleanable; carpet permitted if closely woven and securely attached | Cleanable | Cleanable |
Materials that fail the standard in wet areas: unsealed concrete, unsealed wood, standard drywall without a moisture-resistant finish, acoustic ceiling tile with a fissured or porous face, and carpet.
Acceptable floor materials in food areas include quarry tile with epoxy grout, sealed poured epoxy or urethane, and commercial-grade sealed concrete. Acceptable wall finishes include FRP (fiberglass-reinforced panel), stainless steel, epoxy-painted smooth block, and ceramic tile with sanitary grout. Ceilings should be smooth, washable panels or coated gypsum; where lay-in tile is used it must be smooth, nonabsorbent, and cleanable, and clips are commonly required to prevent lift.
Coving
The floor and wall juncture is where soil, water, and pests accumulate, and a 90-degree corner cannot be effectively cleaned.
- The Food Code requires that in food establishments where cleaning methods other than water flushing are used, floor and wall junctures be coved and closed to no larger than 1 mm (one thirty-second inch).
- In areas subject to water flush cleaning, floors must be graded to drain and the juncture must be coved and sealed.
- Plan review practice in most jurisdictions goes further, specifying an integral or applied coved base with a defined radius — commonly 3/8 inch — because a curved transition can actually be mopped. Check the adopted local requirement rather than assuming a number.
Cove base must be integral or sealed to both floor and wall. A vinyl base stuck on with adhesive that lifts at the bottom edge is a harborage, and it is one of the most frequently cited plan-review-related deficiencies at the pre-operational inspection.
Lighting
Three levels, and the exam expects all three.
| Level | Where required |
|---|---|
| 50 foot-candles (540 lux) | At surfaces where a food employee is working with food or working with utensils or equipment such as knives, slicers, grinders, or saws where employee safety is a factor |
| 20 foot-candles (215 lux) | At a surface where food is provided for consumer self-service or where fresh produce or packaged foods are sold; inside equipment such as reach-in and under-counter refrigerators; at a distance of 30 inches above the floor in areas used for handwashing, warewashing, equipment and utensil storage, and in toilet rooms |
| 10 foot-candles (108 lux) | At a distance of 30 inches above the floor in walk-in refrigeration units and dry food storage areas, and in other areas and rooms during periods of cleaning |
Shielding
Light bulbs must be shielded, coated, or otherwise shatter-resistant in areas where there is exposed food, clean equipment, utensils, linens, or unwrapped single-service and single-use articles. Two exemptions worth knowing: shielding is not required where a shatter-resistant bulb is used, and infrared or heat lamps must be protected against breakage by a shield surrounding and extending beyond the bulb so that only the face is exposed.
A broken unshielded bulb over an open prep table is a physical hazard event — the food beneath must be discarded and the area cleaned before work resumes.
Ventilation
Ventilation systems must be designed so that grease, heat, steam, condensation, vapors, obnoxious odors, smoke, and fumes are removed, and so that they do not create a nuisance or a contamination pathway.
| Element | Requirement or consideration |
|---|---|
| Hood type | Type I over grease-producing appliances (fryers, griddles, ranges, broilers); Type II over steam and heat-only appliances (dishwashers, ovens without grease) |
| Capture and containment | The hood must capture the plume; overhang and capture velocity are engineering parameters verified in plan review |
| Filters | Removable, cleanable, tight-fitting, at an angle so grease drains to a collection trough; not to be run through the dish machine with utensils |
| Duct and fan cleaning | Scheduled by cooking volume and fuel type; a documented service record is expected |
| Fire suppression | Wet chemical system, interlocked to shut down fuel and to activate on discharge; inspected semiannually in most jurisdictions |
| Makeup air | Required. An exhaust system without balanced makeup air creates negative building pressure |
| Air balance | Positive or neutral pressure in food preparation areas; airflow should move from clean areas toward dirty areas, never the reverse |
| Intake location | Fresh air intakes located away from exhaust discharge, dumpsters, and loading docks |
| Restroom exhaust | Mechanically vented to the outside |
Why makeup air matters
Running a large exhaust hood without an equivalent supply of makeup air pulls the building into negative pressure. Three consequences follow:
- Backdrafting. Combustion gases — including carbon monoxide — from gas-fired water heaters, boilers, and furnaces are pulled back down their flues into the building instead of venting.
- Poor hood capture. The hood starves for air and stops containing the plume, so grease and steam spill into the kitchen.
- Uncontrolled infiltration. Air is drawn in through door gaps, drains, and wall penetrations, bringing dust, odors, and insects with it. Doors become hard to open.
A plan reviewer checks the mechanical schedule for exhaust CFM and makeup CFM and looks for a balance. A large deficit is a design defect, not a commissioning detail.
Other Physical Facility Items in Plan Review
- Outer openings protected — self-closing solid doors, screens at 16 mesh to the inch or finer, air curtains where permitted, and sealed penetrations for utilities
- Dressing rooms and lockers provided where employees change clothes routinely, located outside food and utensil storage areas
- A service sink or curbed cleaning facility with a floor drain for mop water disposal — required, and frequently missing from plans
- Storage of mops and brooms in a position that allows air drying
- Living or sleeping quarters separated from food establishment operations
- Animals excluded, with defined exceptions such as service animals in dining areas and patrol dogs in some settings
What is the minimum light intensity required at a distance of 30 inches above the floor in a walk-in refrigeration unit and in dry food storage?
A kitchen design specifies 6,000 CFM of Type I hood exhaust and no dedicated makeup air unit. What is the principal consequence?
Which floor and wall juncture treatment meets the Food Code requirement in a food establishment where cleaning methods other than water flushing are used?
Which lighting requirement applies to bulbs installed directly above an open food preparation table?