Tenmat’s Intumescent Fireblocking for Ventilated Rainscreen Systems Receives New York City DOB/OTCR Material Approval
New York, NY – April 14th,2025| Tenmat, a global leader in high-performance passive fire protection solutions and materials, is proud to announce that its intumescent fireblocking for ventilated rainscreen systems has received official material approval from the New York City Department of Buildings (DOB) and the Office of Technical Certification and Research (OTCR). This approval exemplifies Tenmat’s commitment to providing innovative, code-compliant fire protection technology for modern-day façade applications.
Until now, architects and specifiers have faced challenges when designing façade systems, in accordance with the new NYC Building Code. When specifying appropriate fireblocking, traditional methods often block ventilation and drainage – diminishing the advantages of façade applications. However, the recent development of Intumescent Fireblocking has addressed this issue.
With NYC’s DOB/OTCR approval, Tenmat’s Intumescent Fireblock material complies with the 2022 NYC Building Code Section 718.2.1 (item #8) when required in concealed spaces of exterior wall coverings as specified in accordance with BC 718.2.6.1. With the increasing emphasis on fire safety in new high-rise and commercial construction, this seal of approval enables architects, developers, and contractors to specify Tenmat’s fireblocking solutions with confidence.
“We are thrilled to receive this important acceptance letter from New York City DOB/OTCR,” said Marco Kristen, President at Tenmat. “This approval validates from the effectiveness of our intumescent fire block on preventing the spread of fire in ventilated rainscreen systems, a critical component of modern building envelope design.”
Under normal conditions, Tenmat’s rigid and highly expansive intumescent fire block enables the maintenance of an open ventilated cavity, preserving the energy conservation and building science benefits associated with cladding systems, while concurrently serving as a formidable fire barrier in the event of a building fire. Furthermore, this technology allows for ventilated rainscreen systems to operate at maximum capacity while performing and meeting fire safety standards. For more information about Tenmat’s intumescent fireblocking solutions and how they contribute to enhanced fire safety in ventilated rainscreen systems, contact Morgan Allen at 302-633-6600.
About Tenmat
For over 100 years, Tenmat has been a leader in the development, engineering and manufacturing of intumescent materials that offer advanced passive fire protection and fire blocking capabilities.
Tenmat offers a unique range of flexible, lightweight, and ready-to-use products and solutions for the most demanding firestopping applications. Our state-of-the-art, in-house R&D Laboratory and ISO 9001:2015 accredited production facilities have been developing and manufacturing technically superior passive fire protection products and intumescent materials for over 100 years. All Tenmat products have been fire-tested by independent third-party labs such as UL and Intertek. To learn more about Tenmat, click here.
