Project For Building News
Roof gardens: water management with Drain Floor
In recent years, building design has finally begun to ask a different question than in the past: how can a building become an active part of natural resource management, instead of simply being affected by it?
Water, soil and greenery are not elements to be contained, but variables to be managed intelligently.
From experiments with green roofs to urban regeneration projects, it is clear that stormwater management is a structural issue, not a secondary one.
If your projects include green roofs or roof gardens, you already know that proper water management is the key factor for a successful intervention.
How can water be drained, stored and released in the best possible way, while avoiding stagnation and hydraulic overload?
To meet this need, our technicians developed Drain Floor: a recycled plastic system for rainwater drainage and water storage that ensures water balance, plant growth and the durability of roof gardens.
What Drain Floor is, the element for roof gardens
Drain Floor is a honeycomb membrane for protection, drainage and water storage made of recycled plastic, designed to work as a functional layer within roof garden build-ups, in contact with the waterproofing layer of roof systems.”
Drain Floor by Project For Building, element made of 100% recycled plastic for roof gardens
Installation is simple and quick, but the value of the system is best assessed in what happens over time.
Thanks to its geometry, Drain Floor distributes loads while protecting the waterproofing layer from mechanical damage, creates a continuous air gap required for the drainage of rainwater, and allows the temporary storage of water, which can then be gradually released into the soil to nourish the vegetation’s root system. A structure that helps you avoid stagnation, reduce hydraulic stress and protect the overall balance of the build-up.
Drain Floor is not an additional element, but a true design component that controls the behaviour of water within the building system.
Drain Floor and green roofs: water balance
The full potential of Drain Floor is best expressed in green roofs, both extensive and intensive.
The cup-shaped structure of the membrane makes it possible to:
- retain a calibrated amount of water
- create a water reserve useful during drier periods
- promote the drainage of excess water during heavy rainfall
Your roof garden or green roof project can therefore benefit from greater stability, reduced maintenance and improved overall reliability of the roof system.
Measurable sustainability
Drain Floor is produced within our circular economy system, concrete and measurable as shown in the Project For Building Sustainability Report.
The material used comes from recycled plastic and is processed in-house, within a controlled supply chain that allows us to maintain consistent product quality while reducing waste, transport and external dependencies.
From a design perspective, Drain Floor, like all our construction solutions, is consistent with CAM Building Requirements, suitable for both public and private projects where environmental criteria are a technical requirement, and can be included in green roof build-ups in compliance with UNI 11235:2015.
The sustainability of our products is a verifiable design parameter, just like mechanical performance and long-term durability.
Drain Floor is a key element for stormwater management and one of the ways we support designers and construction companies towards new visions of green building based on research and innovation. Just like us! 🌿
The Project For Building production cycle: from waste to resource
One of the features that sets our products apart is full control over the supply chain: recycled plastic arrives at our facility, is regenerated, transformed into granules and used to mould the formworks.
No external steps, no dependence on third-party suppliers, maximum quality and consistency.
The Project For Building recycling cycle
