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External Plant Building Design

By PMG Engineering ·

Introduction to Food Plant Design

Food plant design refers to the overall planning and construction of a manufacturing facility that ensures food safety, hygiene, and efficiency. A well-designed food processing plant aims to:

  • Minimize contamination risks
  • Prevent pest infestations
  • Optimize food production efficiency
  • Ensure regulatory compliance (HACCP, GMP, FDA)

Unlike non-food plants, food manufacturing facilities require specialized design considerations, including hygienic food processing equipment, controlled environments, and waste management solutions.

Food Plant Design: Premises and Surroundings

A sanitary food facility should have a well-planned location, site conditions, and external infrastructure to prevent contamination and ensure operational efficiency.

1. Location Selection

The food processing facility should be situated away from potential contamination sources, such as:

  • Chemical plants
  • Sewage treatment facilities
  • Livestock housing or farms
  • Bodies of water

If unavoidable, air filtration systems and odor control mechanisms should be in place to prevent contamination.

2. Site Preparation and Maintenance

  • The site should be cleared of toxic materials before construction.
  • Proper drainage systems should be installed to prevent standing water.
  • Storm sewers should allow for adequate runoff.
  • Landscaping guidelines:
  • Trees and shrubs: At least 30 feet from the building
  • Grass coverings: Minimum 30 inches from walls
  • Gravel buffer: Helps discourage rodents

3. Exterior Lighting

  • Proper lighting placement prevents insect attraction.
  • Lights should be mounted at least 30 feet from buildings.
  • Shielding with non-breakable transparent materials prevents contamination.

4. Driveways and Receiving Areas

  • Avoid asphalt driveways (rodent attraction risk).
  • Ensure proper paving and drainage.
  • Drains should include catch baskets to prevent clogging.
  • Install hose stations for easy cleaning.

Food Plant Design: Exterior Building Features

1. Loading Docks & Receiving Areas

  • Receiving rooms should be fully enclosed to prevent pests.
  • Loading docks should be at least 3 feet above ground.
  • Galvanized metal underlining prevents rodent intrusion.
  • Use rapid open/close doors or air curtains to block insects and birds.

2. Exterior Walls

  • Preferred materials:
  1. Poured concrete (low maintenance, fewer seams)
  2. Sealed concrete blocks (prevents mold and mildew)
  • Least desirable: Corrugated metal siding (requires extensive caulking at seams).

3. Roof Design Considerations

  • Flat roofs should be avoided (prone to dust accumulation).
  • Smooth membrane-type roofs are ideal.
  • Avoid tar and gravel roofs (difficult to clean, attracts dust and pests).

4. Openings & Windows

  • Doors, ventilation ducts, and other openings should be sealed and screened.
  • Exhaust fans and vents should be flashed and insect-proofed.
  • Windows are discouraged due to glass breakage risks.
  • If used, they should be flush with walls and permanently closed.
  • Sills should be sloped at a minimum 45-degree angle to prevent bird nesting.

Key Elements of Food Plant Design

A food plant layout should include:

  • Food processing equipment placement
  • Storage areas for raw materials and finished products
  • Shop facilities and maintenance areas
  • Office spaces and administration blocks
  • Delivery and shipping zones
  • Site plans and elevation drawings
  • Instrumentation and process monitoring systems
  • Utility and waste treatment facilities
  • Sanitary controls for contamination prevention

By incorporating hygienic design principles, food manufacturers can ensure compliance with food industry regulations while maintaining high productivity and safety standards.

Conclusion: Building a World-Class Food Factory

Whether you're planning a greenfield project or upgrading an existing facility, investing in expert-led food plant design services ensures:

  • Seamless operations
  • Long-term cost savings
  • Full regulatory compliance
  • Brand trust and market competitiveness

Partnering with experienced food industry consultants and engineering firms helps transform your vision into a world-class food manufacturing unit.

Frequently asked
What should we avoid siting a new food plant next to?
A food processing facility should be located away from potential contamination sources such as chemical plants, sewage treatment facilities, livestock housing or farms, and bodies of water. Where such proximity is unavoidable, air filtration systems and odor control mechanisms should be installed to prevent contamination reaching the plant. Location selection is one of the first decisions in hygienic food plant design.
What are the landscaping rules around a food factory building?
For a food plant, trees and shrubs should be kept at least 30 feet from the building, grass coverings should start a minimum of 30 inches from walls, and a gravel buffer should be provided because it helps discourage rodents. The site should also be cleared of toxic materials before construction, with drainage that prevents standing water and storm sewers sized for adequate runoff.
How should loading docks and receiving areas be designed to keep pests out?
In food plant design, receiving rooms should be fully enclosed to prevent pest entry, and loading docks should be at least 3 feet above ground. Galvanized metal underlining prevents rodent intrusion at the dock. Rapid open/close doors or air curtains should be used to block insects and birds. Driveways need proper paving and drainage, with catch baskets in drains and hose stations for cleaning.
Which exterior wall and roof materials are best for a food processing plant?
For food plant exterior walls, poured concrete is preferred for low maintenance and fewer seams, and sealed concrete blocks help prevent mold and mildew; corrugated metal siding is least desirable because it needs extensive caulking at seams. For roofs, smooth membrane types are ideal. Flat roofs should be avoided as they accumulate dust, and tar and gravel roofs are hard to clean and attract dust and pests.
Why does PMG discourage windows in food manufacturing buildings?
Windows are discouraged in food manufacturing buildings because of glass breakage and contamination risks. If windows are used, they should be flush with the walls and permanently closed, with sills sloped at a minimum 45-degree angle to prevent bird nesting. All doors, ventilation ducts and other openings should be sealed and screened, and exhaust fans and vents flashed and insect-proofed.
How does exterior lighting affect insect control at a food plant?
Exterior lighting placement at a food plant directly affects insect attraction. Lights should be mounted at least 30 feet away from buildings so insects are drawn away from the structure rather than towards doors and openings. Fixtures should be shielded with non-breakable transparent materials so that breakage cannot become a contamination source.
CITE THIS

PMG Engineering. (2019). External Plant Building Design. PMG Engineering. https://pmg.engineering/Article/10/external-plant-building-design/

https://pmg.engineering/Article/10/external-plant-building-design/