Formwork for lightweight structural fillings and ventilated foundations and slabs
Modulo is a permanent formwork designed for the construction of ventilated crawl spaces and sanitary voids, creating a physical barrier between the ground and the building. Through natural or forced ventilation, the crawl space built with Modulo eliminates rising damp and directs Radon gas toward the atmosphere, enhancing indoor health and improving the durability of the structure.
 
Made of Graplene, a 100% recycled polypropylene compound, Modulo is a robust, lightweight, and sustainable formwork, EPD-certified to document its environmental impact across its entire life cycle. Once installed with its interlocking system, Modulo creates a walkable surface that enables the construction of a reinforced concrete slab featuring a dome-shaped geometry. The multitude of supporting points ensures efficient load distribution, providing high structural performance and allowing the construction of self-supporting elements with reduced thickness compared to traditional slabs.
 
The cavity created beneath the slab can be used not only for ventilation but also for routing building services or forming lightweight, high-performance fills.
 
Modulo is therefore a complete, versatile, and sustainable construction system, ideal for improving the hygienic and technical performance of buildings while ensuring durable, stable structures that comply with best design practices.
Modulo enables a single simultaneous pour of foundation beams, crawl space, and slab. Its dome geometry provides high load-bearing capacity with reduced thickness, significantly lowering concrete and aggregate consumption compared to traditional methods. The walkable formwork enhances on-site safety while ensuring a structural behavior suitable even for heavy industrial loads.
INSTALLATION EFFICIENCY AND COST REDUCTION
Modulo delivers up to 80% labor savings thanks to its lightweight components, fast installation without equipment, and modular interlocking system. Stackable elements reduce transport volumes and overall logistics costs.
DESIGN ADAPTABILITY AND SERVICE INTEGRATION
Modulo easily adapts to complex perimeters, ramps, and sloped surfaces. Geoblock allows compensation and cutting without shoring, simplifying installation even in irregular spaces. The technical void beneath the slab provides free routing of service lines in any direction, maintaining accessibility and efficient layout of utilities.
HEALTH, PROTECTION, AND DURABILITY
Modulo forms a continuous barrier against rising damp, fully separating the concrete from the soil and improving the breathability of perimeter walls. Multidirectional natural ventilation removes radon gas and keeps the cavity dry, enhancing concrete durability and improving the building’s overall thermal and hygrometric performance.
CERTIFIED SUSTAINABILITY
Made from 100% recycled plastic, Modulo reduces environmental impact and material consumption. Its EPD certification supports CAM compliance and contributes up to 14 LEED points, while reduced concrete use and transport significantly lower CO₂ emissions.
GEOBLOCK allows a safe place on-site of a ventilated foundation. GEOBLOCK permits to cast at the same time both the foundation’s beams and the slab, saving time from the manpower. A monolithic concrete cast permits the obtainment of technical and safety advantages.
The STOPEND is the element that avoid the passage of concrete in the cavity. It's an accessory that can be available for the MODULO heights from 13 to 40 cm.
The combined use with MODULO, GEOBLOCK and STOPEND, permits cheap constructive solutions and of high technical significance.
Fast Leg is a truncated pyramid-shaped element made of recycled polypropylene. It facilitates the pouring of concrete into Modulo legs in a single step.
Fast Leg is to be manually inserted into the leg space created by joined Modulo elements.
2 Fast Legs are required for every 2 meters of installed Modulo.
Fast Leg absorbs the pressure generated by the concrete and allows for the casting of concrete without interruptions.
Yes, it is. Just follow the recommendations indicated on the form. Only with temperatures above 30° C, it is necessary to be more careful.
How are ventilation stacks installed?
There is no exact calculations or prescriptions related to the required distance. To obtain an effective ventilation it is important to ensure the chimney effect, with the greatest as possible difference in height between north and south and an extended aeration surface. Geoplast Technical Department is in any case available to give all necessary assistance during both design and installation.
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