Floor lifting of subsided floors can be carried out in different ways and with different filling materials. The most commonly used materials are rigid foam or foam concrete. In principle, the method is similar: small injection holes are drilled into the floor, through which a filling material is injected beneath the structure. Due to the expansion or pressure of this material, the floor is carefully lifted, and voids are filled. But what are the exact differences between rigid foam and foam concrete? And in which situation do you choose one solution over the other?
Foam composition: chemical or organic?
The main difference between the two is whether the material is chemically or organically produced. Rigid foam, often referred to as polyurethane foam (PU foam), expands rapidly and hardens quickly. It is created through a chemical reaction between two liquid components (most commonly polyol and isocyanate). During injection, these substances react, causing the foam to expand and harden. The foaming agent used in the foam concrete of Faber Vloerliften is based on organic components. Because the filling material comes into direct contact with the subsoil, it is essential that it is safe for both people and the environment. That is why our products are extensively tested in our own laboratory and test facilities, and independently certified.
The foam concrete of Faber Vloerliften is FEV-certified, which guarantees that our products do not leave harmful residues or vapours in the surrounding soil or nature. In addition, our foam concrete is 100% recyclable, providing a sustainable and safe solution for all floor restoration work.
Application and product properties
Rigid foam expands very quickly and is, compared to foam concrete, lighter and often more cost-effective. It also hardens faster, which is beneficial for rapid repair work. However, due to its strong expansion, it is less precise. The degree of expansion depends on several factors. Therefore, rigid foam is often used for smaller projects where load and flatness are less critical.
Foam concrete, on the other hand, is heavier but significantly stronger. Due to its high compressive strength, it can handle greater loads, making it suitable for heavier floors and larger surfaces.
Conclusion
Rigid foam is a filling material that hardens quickly and is therefore more suitable for fast lifting applications. Foam concrete, on the other hand, is better suited for heavier floors, larger surfaces, and long-term stability. It is therefore commonly used in production halls, industrial buildings, agricultural environments, distribution centres, and real estate projects. In addition, the foaming agent used in Faber Vloerliften foam concrete is more environmentally friendly.
More information?
Not sure whether to choose rigid foam or foam concrete? We are happy to advise you. With more than 30 years of experience in floor restoration and five locations across the Netherlands, we have extensive knowledge of subsoils and construction structures.
The foam concrete used by Faber Vloerliften is independently tested and sustainably produced. Our specialists inspect the situation on site, advise on the correct approach, and carry out the restoration with minimal disruption. This ensures professional and durable repair, with attention to safety, health, and the environment.