Roof & Floor Cassettes
At Crendon Timber Engineering we manufacture Posi-Joist metal web joist Floor Cassettes with Egger 22mm Protect Decking to speed up the installation of flooring on-site. Our Roof Cassette with Glulam or box truss ridge beams are modular interlocking panels for quick and simple installation creating a vaulted light and open ceiling space.
Engineered Roof & Floor Cassette systems for faster, more efficient construction
Designed to form floor and roof structures, these systems are installed quickly using cranes, significantly reducing on-site construction time while improving accuracy, quality and safety. They provide a faster, safer and more efficient alternative to traditional on-site construction methods.
Crendon Timber Engineering provides in-house design and engineering expertise alongside precision off-site manufacturing, ensuring each Roof & Floor Cassette is developed to meet your project requirements and delivered ready for efficient installation on-site.
Why Choose Crendon Timber Engineering Roof & Floor Cassettes
With pre-installed components and detailed design, our Roof & Floor Cassette systems simplify construction while maintaining high structural and compliance standards.
Key benefits of working with Crendon include:
- In-house design and engineering expertise
- Manufactured using I-Joist or Posi-Joist metal web joists.
- Factory fitted rim beams and metalwork for improved accuracy
- Wide range of sheet materials and finishes available
- Factory-insulated options available
- robustdetails® compliant systems
- Built-in lifting straps for safe and efficient installation
- Proven solutions that increase speed of build
- Trusted by developers and contractors across the UK
Case Study
Premier Inn, Barry Island
We used Roof & Floor Cassettes on a project at the Premier Inn, Barry Island.
By using our off-site manufactured cassettes, we:
- significantly reduced on-site build time
- supported improved health and safety
- allowed for easier coordination between trades.
Get a free quote: contact us on sales.crendon@crendon.co.uk
Complete structural packages
Crendon Timber Engineering offers fully integrated structural timber engineered solutions, ensuring Roof & Floor Cassettes work seamlessly with:
By coordinating design, manufacture and delivery across all elements, we reduce delays, simplify site logistics and improve overall build efficiency. Our Supply & Fit service provides a fully managed solution, ensuring consistency and reliability throughout your project. Insert link.
What are the Benefits of using Roof & Floor Cassettes?
Roof & Floor Cassettes offer a range of practical and commercial benefits, helping to improve build speed, reduce on-site labour and enhance overall construction efficiency.
Faster build programmes
Off-site manufacturing and modular installation significantly reduce construction time and improve programme certainty.
Improved site efficiency
Pre-assembled components minimise on-site labour and simplify sequencing.
Enhanced quality control
Factory production ensures consistent standards, accuracy and reduced defects.
Safer installation
Built-in lifting loops enable efficient crane erection, reducing manual handling risks.
Thermal performance options
Factory-insulated systems improve energy efficiency and compliance.
Open and flexible design
Roof cassette systems enable vaulted ceilings and open internal spaces.
Service integration
Pre-planned service runs reduce clashes and improve coordination for follow-on trades.
Roof & Floor Cassettes FAQs
Find answers to common questions about cassette systems, including design, installation and performance.
What are Roof and Floor Cassettes?
Roof and Floor Cassettes are prefabricated structural timber engineered panels manufactured off-site and delivered ready for installation, designed to speed up construction and improve quality.
What materials are used in your Roof & Floor Cassette systems?
We manufacture cassettes using Posi-Joist metal web joists or I-joists, with a range of decking and sheet material options available.
Can services be incorporated into the design?
Yes, Roof & Floor Cassettes can be designed with pre-planned service runs to accommodate mechanical and electrical installations.
Are insulated options available?
Yes, factory-insulated Roof & Floor Cassettes can be supplied to improve thermal performance and reduce on-site work.
Do Roof & Floor Cassette systems comply with UK Building Regulations?
Yes, all systems are designed to meet relevant UK Building Regulations, including Robust Details where required.
How are the Roof & Floor Cassettes installed?
Roof & Floor Cassettes are delivered to site and craned into position, with built-in lifting straps to ensure safe and efficient handling.
What’s the difference between a Roof Cassette and a Roof Truss?
A Roof Truss is a structural framework that supports the roof shape, while a Roof Cassette is a prefabricated panel system that sits on top of the structure to form the roof deck. Roof Cassettes are typically supplied as insulated or non-insulated panels and can include pre-installed components, helping to accelerate installation and improve build efficiency when used alongside Roof Trusses.
What’s the difference between a Floor Cassette and a Posi-Joist metal web joist?
A Posi-Joist metal web joist is an individual structural joist used to form part of a floor system, whereas a Floor Cassette is a prefabricated panel made up of multiple joists, decking and sometimes insulation. Floor Cassettes are delivered ready for installation, reducing on-site labour and speeding up construction, while Posi-Joists are installed individually on-site.
Are Roof & Floor Cassette systems compliant with robustdetails®?
Yes, Roof & Floor Cassettes can be designed to meet robustdetails® requirements for acoustic performance. Compliance will depend on the specific floor or roof build-up, and Crendon Timber Engineering provides design support to ensure the correct specification is achieved for your project.
How much do Roof & Floor Cassettes cost?
The cost of Roof & Floor Cassette systems will vary depending on factors such as panel size, structural requirements, level of prefabrication and project scale. While cassettes may have a higher upfront cost than traditional methods, they can reduce overall project costs by improving build speed, reducing labour and increasing efficiency. For an accurate quotation, please contact our team.
Are Roof & Floor Cassettes suitable for commercial projects?
Yes, Roof & Floor Cassettes are widely used in commercial as well as residential construction. Their ability to achieve longer spans, improve installation speed and deliver consistent quality makes them well suited to offices, schools, multi-unit developments and other large-scale projects.
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Discuss how Crendon Timber Engineering can support your next project.
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