In modern construction, the window opening is a critical technological node that defines energy performance. At the heart of this system is the recycled PVC window subframe, an element that acts as a true “first sash” for the window. Choosing high-quality plastic profiles is a technical necessity to ensure thermal insulation and regulatory compliance.
Technical advantages of thermal insulation
The recycled PVC window subframe (or false frame) has the fundamental task of creating the correct squaring of the wall opening and providing solid support for window fastening. In the past, sheet metal profiles created thermal bridges—the primary cause of condensation and mold along the perimeter of windows.
The transition to thermal systems has revolutionized the industry. Rigid PVC boasts extremely low thermal conductivity (0.14 – 0.16 W/mK). This makes it the material of choice for manufacturing subframes for doors and windows, ensuring maximum efficiency in full compliance with the new UNI 11979:2025 standard.
Sustainability and CAM Compliance
Utilizing a recycled PVC window subframe responds to the demands of the circular economy. At Mavis, our recovery chain transforms post-industrial waste into new certified resources.
- CAM Standards: Our regenerated material is essential to meet the Minimum Environmental Criteria (CAM) for public tenders.
- Structural Stability: Our blends maintain a high VICAT value (80 °C), guaranteeing excellent flexural strength even on 6-meter bars.
- Impact Resistance: Engineered to withstand on-site stress, facilitating cutting without the risk of cracking.
- Vapor Barrier: PVC protects the installation node from hygrothermal degradation.
Technical properties: Mavis subframe solutions
| Feature | Value | Advantage |
|---|---|---|
| Conductivity | 0.14 – 0.16 W/(m·K) | No thermal bridges |
| VICAT Stability | 80 °C (VST) | Load-bearing function |
| Composition | 33% – 100% Recycled | Green Building compliant |
Mavis experience: linear stability secrets
Installers often worry about the structural stability of plastic over long distances. In our production, we select post-industrial waste with a controlled elastic modulus. This allows us to provide bars of recycled PVC window subframe that maintain excellent linearity, reducing the “bowing” effect found in low-quality materials.
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Bespoke Customization
Mavis specializes in the development of custom plastic profiles. We design specific geometries to solve fastening criticalities between masonry and the frame.
Thermal window subframe: expert FAQ
Why choose PVC over metal or wood?
Unlike metal, a recycled PVC window subframe is a thermal insulating material. Compared to wood, it does not rot and resists moisture, ensuring stable window fastening for decades.
Is the Mavis system suitable for monoblocks?
Absolutely. Our extrusions meet the UNI 11979:2025 requirements, providing the stability required for modern high-performance monoblock systems.
How is the screw grip on recycled material?
The Mavis formulation guarantees a “screw grip” comparable to virgin PVC, resisting mechanical stresses as required by UNI 11979:2025 tests.
Is it compatible with sealants?
Yes. Our profiles ensure perfect adhesion with polyurethane foams and MS Polymer sealants, preventing air infiltration according to UNI 11108.
To learn more, visit our section on plastic profiles for construction.
