Dry storage requires a cool, dry room kept between 50°F and 70°F with humidity at or below 15%, where all food sits at least 6 inches off the floor. Those are the core benchmarks, but proper dry storage involves several overlapping requirements covering temperature, humidity, shelving, sanitation, construction materials, and stock rotation. Whether you’re setting up a restaurant storeroom or preparing for a food safety inspection, here’s what you need to know.
Temperature and Humidity Ranges
The ideal dry storage temperature falls between 50°F and 70°F, with cooler temperatures being better as long as nothing freezes. Heat accelerates spoilage in shelf-stable goods like flour, canned foods, and dried grains, so keeping the room on the cooler end of that range extends shelf life noticeably. A room that regularly climbs above 70°F can shorten the usable life of many dry goods by weeks or months.
Humidity should stay at 15% or lower. Excess moisture promotes mold growth, causes packaging to break down, and can make dry goods like sugar and salt clump or degrade. If your storage area tends to run humid, a dehumidifier or improved ventilation can bring levels down. Monitoring both temperature and humidity with a wall-mounted thermometer and hygrometer is standard practice in commercial kitchens.
Minimum Distance Off the Floor
The FDA Food Code requires all food in dry storage to be kept at least 6 inches (15 cm) above the floor. This serves two purposes: it prevents contamination from floor-level spills, cleaning chemicals, and condensation, and it makes pest activity easier to spot and control. Shelving, wire racks, or pallets all satisfy this requirement. The one exception is food on case lot handling equipment (like rolling dollies), which may temporarily sit lower during receiving and stocking.
Shelving and Spacing
Food stored in dry areas should also be kept away from walls. Federal guidelines for dairy storage specify at least 18 inches from the wall, arranged in orderly aisles, rows, or sections for easy inspection. While not every local health code enforces the same distance for all dry goods, maintaining a gap between shelving and walls is a widely adopted best practice. This spacing allows air to circulate behind shelves, prevents moisture from wicking off walls into products, and gives you room to clean and inspect for pest activity.
Use pallets or dunnage racks for bulk items stored at floor level. Metal wire shelving is preferred over solid shelves because it promotes airflow around stored products and doesn’t trap dust or moisture the way wood can.
Wall and Floor Construction
The surfaces inside a dry storage room need to be smooth, nonabsorbent, and easy to clean. For floors, this means a sealed, smooth surface in any area where food is stored. Rough or porous flooring traps moisture and food particles, creating conditions for mold and pests.
Walls follow the same logic. Acceptable materials include smooth plaster, drywall with sealed and taped joints, masonry with flush mortar joints, plastic laminated panels, and fiberglass reinforced polyester (FRP) panels. Plaster, drywall, and masonry walls need to be sealed with high-gloss enamel, epoxy, or a similar coating. The goal is a surface that won’t absorb moisture or harbor bacteria and that you can wipe down during routine cleaning.
Ventilation and Airflow
A dry storage room needs adequate ventilation to prevent heat buildup and moisture accumulation. Stagnant air allows humidity to rise, especially in rooms near kitchens or dishwashing areas. While there’s no single mandated air exchange rate specifically for dry storage, general facility guidelines recommend at least 5 air changes per hour (ACH) as a baseline for indoor spaces. This can come from a central HVAC system, exhaust fans, or a combination of both.
If your storage room lacks dedicated ventilation, even a simple exhaust fan vented to the outside can make a meaningful difference. The key is preventing pockets of warm, humid air from settling around your inventory.
Light Control
Direct sunlight and excessive artificial light can degrade the quality of stored dry goods. Oils go rancid faster, spices lose potency, and packaging can break down under prolonged light exposure. Dry storage rooms should be kept relatively dark when not in use, with overhead lighting sufficient for reading labels and inspecting stock but not running continuously. If the room has windows, cover or shade them to block direct sunlight.
Pest Prevention
Pests are one of the biggest threats to dry storage. Rodents, insects, and other vermin are attracted to the same shelf-stable foods you’re storing, and once they establish themselves, they contaminate far more product than they consume. Effective pest control in dry storage starts with the room itself: sealed walls, no gaps around pipes or vents, and tight-fitting doors. Any product foreign to the main stored goods, particularly strong-smelling items, should be stored carefully to avoid attracting pests or transferring odors.
Inside the room, keep all open packages in sealed, food-safe containers. Clean the room regularly, sweeping up spills and crumbs promptly. The spacing requirements from floors and walls aren’t just about airflow; they also eliminate hiding spots and make it obvious if droppings, gnaw marks, or other signs of infestation appear.
Stock Rotation With FIFO
Every dry storage area should follow the FIFO system: First In, First Out. The concept is straightforward. Label all incoming products with the date they’re received, then place newer stock behind or below older stock so the oldest items get used first. This is especially important when you have multiple units of the same product, since it’s easy to keep pulling from a freshly delivered case while older stock expires in the back.
FIFO prevents waste and reduces the risk of serving or using products past their prime. It works best when shelves are organized by category and clearly labeled, so staff don’t have to guess where things go during restocking.
Pharmaceutical Dry Storage Differences
If you’re searching for dry storage requirements in a pharmaceutical context rather than food service, the standards differ. “Controlled room temperature” for medications means 68°F to 77°F (20°C to 25°C), with brief spikes up to 104°F (40°C) allowed as long as they don’t last more than 24 hours. A “dry place” in pharmaceutical terms means protection from moisture, and products must also be shielded from freezing, excessive heat, and, where specified, light during storage and shipping. These standards come from the United States Pharmacopeia and are stricter about temperature consistency than food service guidelines.