Cd Reef V4 Cstb 2021 May 2026
A 14-story apartment building (112 units) specified CD Reef V4 CSTB 2021 after a previous underlayment failed acoustic testing. The building design required compliance with NRA (Nouvelle Réglementation Acoustique) standards.
The 2021 revision of the CSTB evaluation for CD Reef V4 introduced several critical updates compared to prior versions (V1, V2, V3). The construction industry was shifting toward the RE2020 environmental regulation. Therefore, the 2021 dossier focused on:
Before diving into the 2021 certification, it is essential to dissect the nomenclature. cd reef v4 cstb 2021
The CD Reef V4 is typically used as a subsurface stormwater detention/retention system or as an infiltration cassette. It allows developers to meet zero-discharge requirements without taking up valuable surface land for ponds or swales.
The CD Reef V4 CSTB 2021 set a new baseline. However, the industry is already moving toward "V5" or "smart" reef systems. The legacy of the 2021 certification is that it forced manufacturers to publish Environmental Product Declarations (EPD) alongside technical data. Future products will likely integrate monitoring sensors (water level, turbidity)—a feature that was still optional in 2021 but is now becoming standard. A 14-story apartment building (112 units) specified CD
This paper presents the fourth version (v4) of the CD Reef model developed by CSTB, an integrated tool for designing, testing, and optimizing artificial reef structures for coastal defense and ecological enhancement. Version 4 introduces improved wave transmission coefficients, porous flow modeling, and biodiversity integration. Validation is performed using large-scale wave flume experiments (2020–2021). CD Reef v4 provides engineers and marine biologists with a validated numerical framework for multi-objective reef design.
Q: Does the "CSTB 2021" certification expire? A: Yes. Typically, a CSTB Avis Technique has a validity of 3 to 5 years. The 2021 certification is likely up for revision or renewal in 2024-2026. Always check the current Dossier Technique before purchasing surplus stock labeled "2021" in 2025. The CD Reef V4 is typically used as
Q: Can I mix CD Reef V4 units with older V3 units? A: The CSTB 2021 appraisal explicitly prohibits mixing generations. The interconnection clips and vertical stacking alignment changed between V3 and V4. Mixing them violates the structural calculation model, voiding insurance.
Q: Is this product available outside Europe? A: While CSTB is a French standard, the CD Reef V4 is distributed in North Africa, the Middle East, and parts of Canada. However, local jurisdictions may require a parallel CSA or ASTM certification.