Mezzanine Floor - Frequently Asked Questions

Mezzanine Floors

Frequently Asked Questions:


Fire Ratings for Mezzanine Floors

Does the mezzanine floor need to be fire rated?

The need for fire rating depends on the intended use of the mezzanine floor. If the floor is designated for storage, automated storage, or maintenance purposes, it may not require fire rating. However, for any other use, fire rating is necessary under the following conditions:

  • The floor area exceeds 400m2.
  • Any edge is in excess of 20 linear metres.
  • The size of the mezzanine floor is more than 50% of the room it is installed in.
  • More than 3 people will be working on the floor simultaneously.


Weight Capacities of Mezzanine Floors

What weight can I put on a mezzanine floor?

Mezzanine floors are designed to accommodate various loads based on British Standard load table classifications:

  • Light weight use: 4.8Kn/m2 (480kg per square metre).
  • Medium weight use: 7.32Kn/m2 (732kg per square metre).
  • Heavy weight use: 9.6Kn/m2 (960kg per square metre).

For precise load considerations, it is recommended to consult with one of our expert representatives who can provide tailored advice based on specific requirements.


Building Regulations Approval

Does a mezzanine floor need to be approved by building regulations?

The simple answer is yes, mezzanine flooring requires building regulations approval.

NSI Projects with its expertise in mezzanine floor installations, will handle the whole process on your behalf.

The approval process typically takes around 48 hours, ensuring a smooth and compliant installation, but this can differ with specific projects, contact one of our team for more details.


Floor Decking Options

What type of floor decking is used?

For internal mezzanine floors, 38mm thick high-density flooring grade chipboard is the standard choice. However, if the floor is exposed to liquids, steel plate can be used. External mezzanine floors, which face the challenges of weather exposure, should use galvanized steel plate, or galvanized open mesh to prevent rusting.


Mezzanine floors offer a versatile solution for space optimisation, but it’s essential to address key considerations such as fire ratings, weight capacities, building regulations, and floor decking options. NSI Projects are experts in mezzanine floor installations and can ensure your project complies with regulations and meets your specific needs.


For specific guidance and expert advice, call our expert team today:

0800 027 1966 or email

Why Use NSI Projects?

NSI Projects have over 40 years of experience in delivering great projects for commercial buildings. We partner with leading suppliers and experts to design, procure and install practical and cost effective solutions for our customers.


Call our experts today on 0800 027 1966.

Huboo warehouse exterior


More Good stored inside due to a new mezzanine floor


The team at NSI Projects provided a complete design and build service to Huboo for this project, taking time to understand our requirements and turning the design into reality. They provided trusted advice and safe project management, allowing us to get on with our daily operations knowing that the installation was under control.

Billy Ansell - Facilities Manager
Industrial pallet racking systems

Ribble Technologies.

We received top notch service from Alex Gallagher and the team with the install of our racking, couldn't recommend NSI enough! Nothing was too much trouble, amazing customer and installation service from start to finish.

Emma Cook - Office Manager
Bulk Powders automated pallet racking system

Bulk Powders.

On behalf of Bulk Powders, NSI Projects designed, procured and managed the installation of the automated pallet shuttle system from start to completion, the site was managed so that the installation and ongoing operations could exist side by side.

Guy Martin - Project Consultant

DHL Stirling Park large racking project

DHL Stirling Park.

I wanted to take a moment to express my sincere gratitude for the outstanding job your team did on our recent warehouse project. The changes and installation of the new racking was executed flawlessly and within budget, which is a testament to your team’s expertise and professionalism. Their attention to detail, commitment to quality workmanship, and ability to keep everything on track were truly impressive. They went above and beyond in ensuring that all aspects of the project were completed satisfactorily.

Andrius Cekanauskas - Senior Planning Manager DHL Manufacturing Logistics
Euro Options server room created with dividing walls

Euro Options.

We love the job NSI Projects have done, they worked efficiently and completed the job above our expectations.

Ian Tait - Commercial Manager Euro Options
Arial shot of a warehouse with soalr panels installed

John Scott Works.

A big thank you to NSI Projects for providing us with a quick and quality service.

Matthijis Schot - CEO PRN Group

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