The Process of Building a Mezzanine Floor (Step-by-Step)
Every mezzanine installation project follows a structured sequence, moving from initial site preparation through to final handover. While the exact steps will vary depending on the building and application, the process below outlines how a typical commercial mezzanine is installed on-site.
Pre-Installation Planning & Preparation
Before installation begins, all project details are finalised to ensure the build can proceed safely and efficiently. This includes:
- Completing the final site survey and confirming structural requirements
- Approving detailed layout drawings and load specifications
- Scheduling works and coordinating delivery timelines
- Manufacturing all mezzanine components to specification
This stage ensures that once installation starts on-site, the process can progress smoothly without delays or design changes.
1. Site Setup, Delivery & Preparation
At the start of the mezzanine construction project, the site is prepared for safe and efficient installation, with all equipment and materials in place.
- Delivery of plant equipment (forklifts, scissor lifts, skips): Specialist access and handling equipment is brought to site to safely manoeuvre materials and support installation at height.
- Delivery of mezzanine floor materials: All structural steel, fixings, decking, and components are delivered in accordance with the project schedule.
- Safe offloading into designated laydown areas: Materials are offloaded in pre-agreed zones to maintain site safety and avoid disruption to ongoing operations.
- Checking materials against delivery notes: Each component is verified to ensure completeness and prevent delays once installation begins.
- Sorting materials for efficient installation: Components are organised in build order, which helps to improve installation speed and reduce handling time.
2. Setting Out & Structural Preparation
As construction gets underway, this stage ensures the mezzanine is accurately positioned, integrated, and aligned with the building structure.
- Surveying floor levels: The existing slab is checked for level tolerances to ensure the structure will sit correctly and perform as designed.
- Marking out column positions: Column locations are set out precisely based on approved drawings,ensuring alignment with both structural requirements and operational layout.
- Pre-drilling holes for resin fix studs: Holes are drilled into the slab to receive chemical anchors, which will secure the columns and transfer loads safely into the floor.
3. Structural Framework Installation
Next, the core framework of the mezzanine floor is installed, and the full structural skeleton starts to become visible.
- Standing and securing columns: Columns are positioned and temporarily fixed in place, forming the vertical supports that will carry all imposed loads. Care is taken to ensure they are plumb and correctly aligned before final fixing.
- Installing beams to create ‘goal posts’: Primary beams are fixed between columns to create rigid frames, which form the backbone of the structure.
- Repeating frame installation across the floor: These structural frames are installed sequentially across the footprint, establishing the overall layout and load-bearing grid of the mezzanine.
- Installing purlins and tie rods: Secondary members are added between frames to distribute loads, provide lateral stability, and tie the structure together into a single rigid system.
4. Safety Measures During Installation
Temporary safety systems are installed to protect both installers and site personnel as work progresses at height. These measures are essential to maintain a safe and compliant working environment throughout the build, and include:
- Installing underside safety netting: Fall arrest netting is fitted beneath the structure to reduce risk during installation and protect the area below.
- Adding side netting and temporary handrails: Edge protection is used to create safe working zones and prevent falls as the structure develops.
5. Flooring & Access Installation
With the structure in place, the mezzanine begins to take shape as a usable space as the decking is added.
- Installing decking boards: Floor panels are fixed to the purlins, creating a solid walking surface and locking the structure together.
- Installing permanent handrails and pallet gates: Edge protection systems are fitted to ensure safety and compliance while enabling operational use.
- Positioning and fixing pre-built staircases: Staircases are installed to provide safe and compliant access between levels, typically once the main deck is in place.
- Installing chutes (if required): Where specified, chutes are fitted to support the movement of goods from higher to lower levels.
6. Fit-Out & Workspace Creation
Once the structure and core systems are complete, the mezzanine can be adapted to its intended use. At this stage, the mezzanine begins to transition from a structural platform to a fully functional working environment tailored to the business's needs. This can include:
- Installation of office partitions and enclosed workspaces: Internal layouts are created where office or enclosed environments are required.
- Integration of storage systems or shelving: Racking or shelving may be installed to support warehouse operations.
- Creation of operational areas for equipment or production: The space is configured to suit specific processes, machinery, or workflows.
- Lighting, electrics, and finishing elements: Services begin to be integrated to support day-to-day use.
7. Services, Fire Protection & Finishing
These elements are critical to ensuring the mezzanine meets both safety standards and operational requirements.
- First and second fix electrical works: Electrical systems are installed in stages, including cabling, lighting, and final connections.
- Installation of fire protection systems: Measures such as fire-rated ceilings, column encasement, or other systems are implemented to meet regulatory requirements.
- Completion of suspended ceilings (if required): Ceilings are installed beneath the mezzanine to provide fire resistance and integrate services.
- Integration of lighting and other services: Final service elements are completed to ensure functionality and compliance.
8. Final Fix, Compliance & Handover
The final stage ensures the structure is complete, compliant, and ready for use.
- Securing all bolts and carrying out torque checks: All structural connections are fully tightened and verified to ensure integrity and safety.
- Snagging and final quality checks: Any minor issues are identified and resolved to ensure the finished installation meets expected standards.
- Building regulations sign-off: The mezzanine is inspected and approved as compliant with all relevant regulations.
- Final handover to the client: The completed project is formally handed over, ready for operational use.
Watch our useful video guide to building a mezzanine floor
Mezzanine Floor Components & Terminology
There are a few main components that are used to build almost every mezzanine. Each of these components plays a specific role in ensuring the mezzanine is structurally sound, safe, and fit for purpose.
Columns
Columns are the vertical steel supports that transfer the weight of the mezzanine floor down to the existing building slab. They are one of the most critical structural elements, as they carry all loads from the floor above, including stored goods, equipment, and personnel.
It’s important that the positioning and spacing of the columns are designed carefully so that they distribute weight evenly without overloading the slab. During installation, columns are precisely set out, drilled, and fixed using resin anchors or base plates. Accuracy is essential here, as even small misalignments can affect the entire structure.
Primary Beams
Primary beams are the main horizontal load-bearing members that span between columns. They support the overall structure and transfer loads across the mezzanine. The size and specification of these beams are determined by factors such as span distance and required load capacity.
When installed, beams are typically fixed to columns to form structural frames (often referred to as ‘goal posts’), which are then repeated across the floor area to create the mezzanine framework.
Joists (Purlins)
Joists, also known as purlins, are smaller horizontal components installed between the primary beams. Their role is to support the decking and distribute loads evenly across the structure. They are usually installed at right angles to the beams and at regular intervals to ensure consistent load distribution and structural stability.
During installation, the joists are fixed in sequence after the main frames are in place, which helps to tie the structure together and provide rigidity.
Decking
Decking forms the surface of the mezzanine floor, and in warehouse environments, it’s typically 38mm high-density particle board. Alternative materials such as steel plate or composite decking are also sometimes used, depending on the application.
The choice of decking affects durability, load performance, and suitability for specific uses. For example, double boarding may be used to increase strength and reduce deflection in higher load applications.
Decking is installed once the structural framework is complete, and at this point, you’ll see the mezzanine transform from a skeleton structure into a usable floor.
Edge Protection
Edge protection includes handrails, guards, and kick plates fitted to all exposed edges of the mezzanine. The primary function of these components is safety; they prevent falls and stop items from being accidentally pushed off the edge. They are therefore a requirement for ensuring compliance with health and safety regulations.
When building a mezzanine, edge protection is typically installed after decking. Some protection may initially be fitted as temporary systems during construction to ensure the site is safe, before being replaced with permanent solutions.
Staircases
Staircases provide safe and compliant access between ground level and the mezzanine floor, or between mezzanine levels. There are generally two types:
- Utility stairs, used for maintenance or occasional access
- General access stairs, designed for regular daily use
Staircases must comply with building regulations (such as Approved Document K in the UK), including requirements for width, pitch, and handrails. They are usually pre-fabricated and installed toward the later stages of the build, once the main structure and decking are in place.
Pallet Gates
Pallet gates provide a safe method of transferring goods between levels, particularly in warehouse environments. They’re designed to maintain edge protection at all times while allowing pallets to be loaded and unloaded. A typical system uses an up-and-over gate mechanism to ensure that one side is always closed.
Pallet gates are usually installed once the floor and edge protection systems are in place, and their position is designed to fit the workflow and operational requirements of the warehouse.
Fire Protection
To give a mezzanine floor a 1-hour fire protection, each level (if multi-level) is fitted with a full area suspended ceiling using fire-rated tiles and Vermiculux PVC-faced fascia boards with fire breaks in the floor void.
Floor columns are encased in Vermiculux PVC clip-on casings. Alternatively, the building may have a suitable sprinkler system and other fire resistance measures in place utilising intumescent paint products.
Fire protection is required when:
- The mezzanine occupies over 50% of the total floor space of the building. This can be 20% if the mezzanine is to be used for offices.
- The mezzanine exceeds 400 M²
- More than 3 people will be working continuously on the mezzanine level at any one time
- The mezzanine is intended for usage other than storage
Find out more: Mezzanine Floor Fire Protection
Key Considerations When Designing a Mezzanine Floor
When building a mezzanine floor, there are a number of things to consider that can impact the construction process as well as the type of floor that is installed.
Floor Usage
One of the first areas of consideration is how the floor will be used. Common uses include as storage space, as an office mezzanine floor, or as space for operation-specific equipment.
It’s essential to identify how the floor will be used to ensure it is designed and installed to meet these requirements, including the floor materials, load capacity, fire protection, and access points.
Size of the Mezzanine
The size of the mezzanine will affect the cost and the installation time. It’s important to install a mezzanine that offers sufficient space to meet its objectives.
However, the size of the floor can also be impacted by existing features of the building, and it is vital to carry out a survey before the design stage in order to identify what size floor can be installed.
Site of Installation
The building or facility into which the mezzanine floor is to be installed can have a significant impact on the type of floor that can be used, as well as the cost and time needed to complete the project.
The existing slab will need to be inspected to ensure it can support the weight of the mezzanine. Any existing internal structures, as well as entry and exit points, paths and walkways, HVAC and electrical systems, will need to be considered, and structural changes that may be required will need to be accounted for within the project.
Site access also needs to be assessed to ensure that a suitable schedule for the delivery of equipment and materials is implemented.
Mezzanine Floor Costs & Timeframes
Two of the most common questions people have when they’re considering a mezzanine are how long will the project take and how much it will cost. Both of these things can vary quite significantly, but understanding the key factors involved helps you to set realistic expectations.
How Long Does It Take to Build a Mezzanine Floor?
Installation can take as little as 2 to 3 weeks from the delivery of materials for a straightforward project. However, the overall timeline will depend on several factors, including:
- The size and scale of the mezzanine
- The complexity of the design and layout
- The level of fit-out required (e.g. offices, services, fire protection)
- Site conditions and access constraints
- Whether work needs to be phased around ongoing operations
It’s also important to consider that the full project timeline includes design, approvals, and manufacturing lead time prior to installation.
How Much Does It Cost to Build a Mezzanine Floor?
The cost of a mezzanine floor can vary significantly depending on the specific requirements of the project. Key factors that influence cost include:
- Size of the floor: Larger areas require more materials and installation time
- Intended use: Storage, office, or operational use will affect design and specification
- Structural requirements: Load capacity and span distances influence steelwork design
- Fire protection and services: Elements such as ceilings, electrics, and compliance systems can add to the overall cost
- Building constraints: Existing structures, slab capacity, and access can impact design and installation complexity
Because every mezzanine is bespoke, an accurate cost can only be provided following a detailed site survey and design.
Find out more: How Much Does a Mezzanine Floor Cost?
Common Mistakes to Avoid When Building A Mezzanine
When planning and building a mezzanine floor, certain mistakes can lead to delays, increased costs, or operational issues. An experienced design and installation partner can help you avoid these issues so the project is completed on time, within budget, and with minimal disruption to your operation.
Mistake 1: Underestimating Load Requirements
One of the most common issues we see when replacing or upgrading a mezzanine is that the floor has been designed without fully considering the loads it will need to support, especially in the future.
This can lead to structural limitations and restricted usage. It also means that modifications are needed down the line that end up being more costly than if they were included in the original build.
How to avoid this:
Load requirements should be carefully assessed at the design stage, taking into account storage systems, equipment, and potential future expansion. Of course, it’s impossible to fully predict the future, but as a general rule, it’s always better to design with some flexibility aligned with projected growth rather than needing to retrofit later.
Mistake 2: Failing to Consider Fire Protection Early
Fire protection is a really important aspect of a mezzanine, but sometimes it’s treated as an afterthought, which can have a significant impact on both design and cost.
Late-stage changes to accommodate fire-protection measures needed for compliance can result in a redesign of the mezzanine or the need for additional materials and installation work. All of this results in project delays and increased costs.
How to avoid this:
Ensure that fire protection requirements are fully assessed at the outset. Integrating these into the initial design avoids a lot of disruption later in the project.
Mistake 3: Poor Column Positioning
Poorly planned column placement can create major operational issues once the mezzanine is in use. The position of columns can affect everything from forklift routes to picking and packing areas, as well as access to storage locations.
How to avoid this:
Column layouts are essential for structural efficiency, but it’s also important to account for workflow and required movement within the space as far as possible when designing the project.
Mistake 4: Not Planning Access Routes Properly
Building on the last mistake, access is often underestimated in warehouse design, particularly in busy environments. Common issues relating to mezzanines include staircases being positioned in inefficient locations, insufficient access points, and poor integration with existing workflows.
How to avoid this:
A well-designed mezzanine project includes access points like stairs and pallet gates, and these should be positioned to support safe and efficient movement of both people and goods. This should be considered alongside day-to-day operations, not just compliance.
Our Mezzanine Floor Process
Building a mezzanine floor involves multiple stages, careful planning, and strict compliance with structural and fire safety regulations.
Successfully delivering a project requires coordinated design, project management, and specialist expertise at every stage, which is why we provide a fully managed process from initial concept through to final handover.
Every project is unique, but generally, the process we follow when installing a mezzanine is as follows:
- Consultation & Site Survey: We assess your requirements, operational needs, and available space, ensuring the building is suitable and identifying the best layout.
- Design & Compliance: We create a bespoke design including structural calculations and full compliance with building regulations.
- Project Planning & Management: We coordinate timelines, materials, and installation to ensure efficient delivery with minimal disruption.
- Manufacture & Delivery: All components are manufactured to specification and delivered in line with the project schedule.
- Installation & Build: Our experienced team carries out the installation safely and efficiently.
- Fit-Out & Finishing: We create fully functional spaces, including offices, storage, and operational areas where required.
- Compliance, Handover & Aftercare: We complete all checks, secure approvals, and hand over the finished project, with ongoing support available.
FAQs About Building A Mezzanine
Q: Do I need planning permission to install a mezzanine floor?
A: No, you do not usually need to obtain planning permission to install a mezzanine floor in a commercial space.
Q: How long does it take to install a mezzanine floor?
A: Mezzanine floors can be installed in as little as 2-3 weeks from the delivery of materials. However, each project has its own set of requirements and an accurate timeframe for completion will be provided once the site has been surveyed, requirements identified and a bespoke floor designed.
Q: Will a mezzanine floor affect business rates?
A: This will depend on the intended use of the mezzanine. For example, if you are using the floor to add new office space to a facility then it may impact business rates. If the floor is being used as storage space, then it is unlikely to impact business rates. Learn more about business rates & mezzanine floors.
Q: How much does it cost to build a mezzanine floor?
A: The cost of a mezzanine floor installation can vary quite significantly from one project to another, depending on aspects such as the size, the intended use, and the building into which it is being placed. Contact Avanta for an accurate quote based on your specific requirements.
Q: Does a mezzanine floor count as a structural alteration?
A: The installation of a mezzanine floor is an alteration to your building, and as such, it is essential to ensure that it complies with all relevant building regulations. By working with an experienced partner like Avanta, all necessary building regulation approvals will be included as part of the project.
Q: Does a mezzanine floor need to be fire-rated?
A: It depends on the intended use of the floor, how many people will be using the floor, its size and the scale of the floor in relation to the existing building. All relevant factors will be assessed during the design stage, and appropriate fire protection will be included in the design and cost for the project.
Q: When should a food warehouse be refurbished?
A: Refurbishment may be needed when storage capacity is limited, layouts become inefficient, hygiene standards are harder to maintain, or new product requirements cannot be accommodated within the existing setup.
More: Mezzanine Flooring FAQs