This article provides a deep dive into what encompasses and why it is essential for modern construction projects. What is CD-Reef v4?
Users can filter by keyword, document type, structural element (e.g., roofing, foundations), or publication date.
Access to NF EN standards and DTUs indispensable for executing structural works.
Note: As of 2026, the dataset and a simplified GUI are available on CSTB’s research data portal. cd reef v4 cstb 2021
To appreciate the value of the Reef product, one must first understand the authority behind it. The CSTB is much more than a simple publisher. It is a public establishment serving innovation in the building industry, whose activities are structured around four key pillars: research, expertise, evaluation (including product certification), and the dissemination of knowledge.
The brought key changes to keep up with green building laws and new tech. It helps architects, engineers, and builders stay safe and legal. What is CD Reef V4 CSTB?
March 2021 – CSTB Technical Report No. 2021-09 This article provides a deep dive into what
: Access to over 10,000 documents covering the technical and regulatory framework of construction, including DTU (Unified Technical Documents) , legislative texts, and calculation rules. Sector-Specific Coverage : The software spans multiple domains, including: Building Physics : Thermal, acoustic, and fire safety regulations. Architecture & Urbanism : Design guides and urban planning regulations. Legal Frameworks : Construction insurance, liability, and site safety. Flexible Access : Available as an online service (Reef Intégral)
This is the core strength of Reef technology. The 2021 evaluation certified an L'nT,w as low as with a 6mm underlay + 60mm screed. For context, an untreated concrete slab typically measures 78 dB. A reduction to 45 dB is equivalent to dropping from "loud footsteps" to "whispered conversation."
is a fourth-generation resilient acoustic underlayment, primarily manufactured for use under cementitious and anhydrite screeds. Unlike traditional foam or rubber underlays, the "Reef" series utilizes a high-density recycled elastomer matrix, often incorporating granulated rubber bonded with polyurethane resins. The "V4" designation signifies the fourth version of this product line, incorporating improvements in compression resistance, thermal conductivity, and long-term creep behavior based on feedback from prior installations. Access to NF EN standards and DTUs indispensable
Thus, "" refers to the 2021 edition of the fourth version of the Reef documentary database , published by the French CSTB, distributed on a CD-ROM or DVD.
The construction industry in 2021 was heavily focused on sustainability and digital transition (BIM - Building Information Modeling). The CD-Reef v4 database supported this by integrating the technical aspects of:
It is important not to confuse the Reef with other CSTB products. The keyword sometimes leads to confusion with a completely different software also called "CD-Reef", which is a tool "designed to simulate the behavior of marine structures subjected to waves and currents" for coastal protection projects. This is a specialized engineering simulation tool, not the documentary encyclopedia.
Technical guidelines, test protocols, and general installation rules. Key Features and Functionalities of CD-Reef V4
The national standard codes of practice for traditional building techniques.