ComFlor 80 (CF80) Composite Floor Decking

ComFlor 80 is a deep profile composite floor decking system designed for projects requiring longer spans and improved structural efficiency. With an 80mm trapezoidal profile and 600mm cover width, it reduces the need for secondary beams, helping to lower overall structural costs.

ComFlor 80 prices start from £19/m² (supply only), making it a cost-effective solution for commercial, residential, and mixed-use developments where performance and speed of installation are critical.

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Key Benefits

• 80mm deep composite profile – ideal for longer spans and reduced secondary beam requirements
• 600mm cover width – efficient installation with fewer sheets required per m²
• Improved spanning capability – reduces steelwork costs across the structure
• Lower concrete volume – optimised slab design helps minimise overall material usage
• Fast installation – lightweight sheets allow quick handling and fixing on site
• Round-shouldered profile design – enables easy service integration without additional drilling
• Fire performance options – suitable for a range of slab depths and building regulations
• Pre-finished soffit options available – ideal for exposed ceiling applications
• Available in multiple gauges – typically 0.9mm, 1.0mm, and 1.2mm to suit structural requirements
• CE marked and compliant – designed in accordance with BS EN standards and Eurocode

 

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Sectional Properties

Section properties conform to BS 5950 and Eurocode. Source: ComFlor 80 product datasheet.

Panel Weight Reference

Approximate weight of a single ComFlor 80 sheet at 3 metres length and 600mm cover width (panel area = 1.80 m²). Despite being 20mm deeper than ComFlor 60, the profile weight per m² is comparable, and handling characteristics on site are essentially the same.

 

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Concrete Volume per m²

Eurocode density values: normal weight concrete (NWC) wet 25 kN/m³, dry 24 kN/m³; lightweight concrete (LWC) wet 20 kN/m³, dry 19 kN/m³. Deck and mesh weight not included. Ponding allowance not included. Source: ComFlor 80 datasheet (Eurocode values).

 

Fire Performance

Fire design is in accordance with SCI NCCI PN005 (Eurocode) and SCI Publication P359. Two fire design methods are available within the ComFlor 9 design software: the Mesh and Deck Fire Method (mesh reinforcement only) and the Bar Fire Method (reinforcement bars in each deck trough, positioned 25mm above the trough base). The method required depends on the span, slab depth, fire period, and applied load for your specific project.

The minimum slab depths in the table below are indicative for the Mesh and Deck Fire Method with normal weight concrete. At longer spans or higher fire periods, trough bar reinforcement will typically be required and minimum slab depths increase accordingly. The 140mm NWC minimum is a hard floor for this profile. Contact our technical team for project-specific confirmation before proceeding to design.

Indicative values only. Actual minimum slab depths depend on span, applied load, gauge, fire design method, and reinforcement specification. Trough bar reinforcement is typically required at longer spans and higher fire periods. Note: the 140mm slab depth requires mesh at 25mm cover rather than the standard 30mm. Always verify against project-specific span and fire tables. Contact our team for confirmation.

 

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Finishes and Options

• Galvanised Z275 (Galvatite) — standard coating to BS EN 10346 S350GD+Z275, suitable for internal floors in non-aggressive environments
• Colorcoat FD pre-finished soffit — factory-applied pre-finished colour coating to the soffit, giving a bright, attractive finish where no suspended ceiling is specified. Available in a range of colours. Ideal for Grade A commercial office and industrial fit-out where the deck soffit will be visible.

 

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ComFlor 80 vs ComFlor 60 – Which Should You Specify?

  The difference between ComFlor 60 and ComFlor 80 is profile depth and span capability. ComFlor 60 is used for standard spans, while ComFlor 80 allows longer spans and reduces secondary beam requirements.. Choosing between ComFlor 60 (CF60) and ComFlor 80 (CF80) depends on span requirements, structural design, and overall project efficiency.

When to Use ComFlor 60

ComFlor 60 is ideal for:

• Standard span applications
• Residential and smaller commercial projects
• Designs where secondary beams are already part of the structure
• Projects prioritising lower upfront material cost

It provides a well-balanced solution for most typical floor builds, offering reliable performance with efficient installation. ComFlor 60 is a 60mm deep composite steel decking profile used for standard span applications, while ComFlor 80 is an 80mm deep profile designed for longer spans and reduced secondary beam requirements. ComFlor 80 is typically more efficient for larger commercial projects where structural optimisation reduces overall costs.

 

Feature	ComFlor 60 (CF60)	ComFlor 80 (CF80)
Profile Depth	60mm	80mm
Span Capability	Standard spans	Longer spans
Beam Requirements	More secondary beams	Fewer beams required
Concrete Volume	Moderate	Reduced overall volume
Installation Speed	Fast	Faster on large areas
Best For	Residential / small commercial	Large commercial / long spans
Cost Efficiency	Lower upfront cost	Lower total structural cost

 

What is the difference between ComFlor 60 and ComFlor 80?

The main difference is depth and span capability. ComFlor 80 allows longer spans and reduces the need for secondary beams, making it more efficient for larger projects, while ComFlor 60 is better suited to standard applications.

 

 

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When to Use ComFlor 80

ComFlor 80 is better suited for:

• Longer span requirements
• Projects aiming to reduce secondary beam counts
• High-load commercial or mixed-use developments
• Situations where structural efficiency impacts overall cost

By spanning further between supports, ComFlor 80 can significantly reduce steelwork requirements — often delivering lower total project cost despite a higher sheet price.

 

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Key Difference in Simple Terms

• ComFlor 60 = standard, versatile, cost-effective upfront
• ComFlor 80 = fewer beams, longer spans, better overall efficiency
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Which One Is More Cost-Effective?

While ComFlor 60 may appear cheaper per m², ComFlor 80 often becomes more economical when:

• Fewer beams are required
• Installation time is reduced
• Concrete and reinforcement are optimised

👉 In most larger projects, the saving comes from the structure — not the sheet price

 

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Need Help Choosing?

The right specification depends on your drawings, spans, and load requirements.

👉 Contact RMD Profiles to review your project and identify whether ComFlor 60 or ComFlor 80 delivers the best value.

 

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Case Studies

For examples of how ComFlor 80 and other RMD Profiles products have been used on live projects, visit our Projects page.

View Case Studies

Typical Applications

• Commercial office and business park developments where reducing secondary beam count is a structural cost priority
• Industrial and logistics buildings requiring long spans at moderate slab depths
• Mixed-use and institutional buildings where M&E service attachment from the soffit is a design requirement
• Architecturally exposed soffit applications using the Colorcoat FD pre-finished option
• Any project where ComFlor 60 span capability has been exhausted and a step-change in bay size is needed without moving to a made-to-order product

Compliance and Standards

• Section properties conform to BS 5950 and Eurocode
• Load and span tables produced to Eurocode requirements; ComFlor 9 software supports both Eurocode and British Standard design
• Fire design in accordance with SCI NCCI PN005 and SCI Publication P359
• Deck material to BS EN 10346 S350GD+Z275
• Anti-crack mesh requirements to BS EN 1994-1-1 Clause 9.8.1(2)
• Supplied in accordance with the BCSA Code of Practice for metal decking and stud welding

 

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Why Choose RMD Profiles?

Since 2009, RMD Profiles has supported thousands of UK contractors, engineers, and developers with dependable roof and floor decking systems. We combine a wide stocked product range with genuine technical expertise, fast-track supply, and a level of service that keeps projects moving.

• One of the widest stocked ranges of structural decking in the UK
• Exclusive Buy Back Scheme for surplus materials
• Certified stud welding and edge trim expertise, in line with BCSA and SCI guidelines
• Fast-track supply with 24-hour delivery available on stocked lines (subject to stock)
• Trusted partner on over 10,000 UK projects, from hospitals to high-rises

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Further Reading and Guidance

If you want to understand more about how composite floor decking is selected, specified, and installed, the following resources from RMD Profiles cover the key topics in plain language. Whether you are comparing ComFlor 80 against other long span options, or working through the installation and edge detail requirements, these guides will move you forward.

• Composite Floor Decking in the UK: Clear Choices, Faster Floors
  A practical overview of composite floor decking in the UK market, covering profile selection, span and fire design decisions, and how to match the right product to your project requirements. Useful if you are weighing up ComFlor 80 against ComFlor 60 or TR80+ and want to understand the structural and commercial trade-offs.
• The Many Uses of Edge Trim in Metal Deck Construction
  Edge trim is one of the most frequently overlooked elements of a floor deck installation, but it plays a critical role in forming the slab edge, containing wet concrete, and contributing to fire compartmentation. This guide covers the types available and when each is appropriate, including applications directly relevant to ComFlor 80.

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