Granab on 150 mm hollow core slab
Granab’s innovative subfloor system and 150 mm hollow core slabs open up new possibilities in floor slab solutions. This groundbreaking solution offers several advantages over traditional casted concrete slabs and is well suited for apartment buildings, offices and schools.
Perfect for modern construction projects
With a total construction height from 210 mm, including the hollow core slab, the design is very compact. The 150 mm thick hollow core slabs are ideal for spans between 6-8 metres, making them perfectly suited for residential projects, office buildings and school environments.
Dramatic environmental improvement compared to traditional concrete
The biggest advantage over casted concrete floors is the drastically reduced environmental impact. From only 27 kg CO₂eq/m² (A1-A4), a significantly lower carbon footprint is achieved than with traditional casting. This environmental benefit is particularly valuable for apartment buildings, offices and schools, where sustainability aspects are often central to the construction process.
Reduced material consumption also results in lighter concrete elements, which offers advantages in terms of reduced transport and easier installation on site – further factors that contribute to the improved environmental profile.
Dismantlable solutions for the future
Unlike traditional casted concrete floors, this construction allows for complete dismantling and reuse. Both the Granab system, installations and the hollow core slab itself can be dismantled and used in new projects. Since nothing is casted on top of the hollow core slab floor, the accessibility of the materials is preserved, which is a revolutionary change compared to permanent concrete structures.
This dismantlability is particularly valuable for offices and schools, where future renovations are often necessary, as well as for apartment buildings, where flexibility in floor plans is in demand.
Efficient process without any wet casting
Compared to casted concrete floors, which require extensive and wet work, casting and long drying times, the installation of this construction is quick and dry. This significantly benefits the construction project’s schedule and eliminates the risk of moisture-related problems.
Verified performance for demanding environments
The system has undergone extensive acoustic field measurements that confirm its superior performance compared to many traditional solutions. The design meets the high acoustic requirements for apartment buildings, offices and schools, among other things, ensuring a comfortable indoor environment for residents, workers and students.
Compatibility and future-proofing
The floor construction works excellently with bathroom modules and other prefabricated solutions that are becoming increasingly common in modern construction projects. This opens up flexible design possibilities and efficient project planning in various sectors.
Contact us for further information
Please contact us if you would like to know more about how this environmentally friendly and demountable floor construction could benefit your project.
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Environmental certification
Granab works actively to reduce environmental impact and has certifications that confirm our commitment to sustainability. All our subfloor systems have Environmentally Product Declarations (EPD).
